Re: [biofuels-biz] Embodied energy in biodiesel

2004-01-01 Thread David Teal

Tom,
This report incorporates most previous studies on the topic.  It has been
criticised for being less than generous to biodiesel from waste oil, but
have a look anyway:

http://www.defra.gov.uk/farm/acu/research/reports/nf0422.pdf

David T.


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[biofuels-biz] A nice story

2003-12-14 Thread David Teal

One of my customers for biodiesel is a musician.  He decided to build a new
recording studio behind his house.  First job was to excavate for the
foundations.  Being a Brit. and careful with money, he hired a small digger
and had 6 friends come round with wheelbarrows to shift the surplus earth.
On the first day, they all complained about the choking diesel fumes from
the digger.  The second day, the musician syphoned biodiesel out from the
tank of his car and used that to re-fuel the digger.  The 6 friends were
very happy (but still complained that they felt hungry).  The digger didn't
seem to notice any difference.
True.

David T.


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Re: [biofuels-biz] Fwd: Re: [Burnveggies] New German biodiesel standard

2003-11-16 Thread David Teal

Good. Free copy of DIN EN 14214 found and translated by AltaVista Babelfish
from
http://members.dokom.net/torsten.kiebert/html/dinen14214.html

As well as iodine number (which is a proxy for degree of unsaturation),
there are also limits for the percentage of linoleate ester and for esters
of fatty acids with more than 3 double bonds.  This seems to encompass 3
ways of saying the same thing, and smacks of bad law.  I know this is not
the case as the standard has been hammered out by a range of interested and
knowledgeable parties.  Committee compromise?

David T.


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Re: [biofuels-biz] Fwd: [biofuel] Mixing times for complete reactions- was Re: Max capacity

2003-11-08 Thread David Teal

Pannier,
Hydro-cyclone separation is a good idea in principle.  From my experience
with these, I should think you will be looking at a bank of several small
diameter units manifolded together on all three pipes (inlet, apex and
vortex finder).  If these are above the reactor and uninsulated, the mix
will cool and help the thermosyphon to keep going.  Power from a solar
collector can be pretty good in bright sunlight (e.g. 0.5 kW/sq. metre) so
it is not an impossible dream at all.  Remember that once up to operating
temperature you need a heat sink as well as a heat source to get
circulation.  The head loss in skinny cyclones might be around 0.5 metres,
and this added to other pipe friction and entry/exit losses means you will
need quite a tall structure to get a powerful thermosyphon flow.
Glycerol-rich mix will drop out from the apex as underflow.  The question
is; how to get the best balance between removing glycerol (which inhibits
transesterification) and removing catalyst along with the dark stuff?  I
suppose trial and error is a reasonable approach if you have plenty of sunny
days.  The underflow will also contain alcohol and esters.  These will have
to be separated by gravity and distillation for return to the next batch.

 We are interested to  design the use of  solar enegy instead of wood
as fuel  and looking for the innovative design. Is there any one who already
have done this design  for recirculation using thermo siphon  without pump ,
solar heating, product separation on the top using cyclone   and
recirculation of catalyst.Will  this method   useful compared to
conventional  method.


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Re: [biofuels-biz] Fwd: Biorefinery projects take first steps

2003-11-07 Thread David Teal

Quite impressive by the American funding agencies.  One reservation though:

The project's goal is to develop catalyst
systems and a continuous process to produce isosorbide from sorbitol
and to support a scale-up of the process, purification and recovery,
and pilot plant operation. 

So are we heading for huge factories with feedstock being hauled large
distancesagain?

Another intersting snippet I came across recently:

The oil to be esterified must be extremely dry and low in free fatty acids,
peroxides and any other material that may react with sodium methoxide. A few
minutes after the catalyst is added, the oil acquires a reddish brown color
due to the formation of a complex between the sodium and the glycerides.
This complex is thought to be the true catalyst.

David T.


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Re: [biofuels-biz] USING SEPARATOR FOR AFTER WASH TREATMENT OF ME

2003-09-17 Thread David Teal

So, the old question of centrifuge vs. straight gravity separation has
re-surfaced.  I had dismissed centrifuges for various reasons, but would
still like to speed things up.  One action I have observed is that when
misty ME is left to settle in a glass cylinder, a lot of the water is
attracted to the side walls rather than the bottom of the vessel.  Once on
the sides, small water droplets coalesce and fall to the bottom.
The same is not observed in metal or HDPE vessels.  My speculation is that
because the water molecules are polar, while the ME is non-polar, and the
glass is electrically non-conducting, then a static electrical charge on the
cylinder attracts the water.  If this is true, it is left to devise a way of
charging a larger non-conductive plastic vessel (inside +ve, outside -ve or
vice-versa) and we have the makings of a nice quiet but effective process
:-)
By way of caution, I still harbour a suspicion that clearing may be due to
peroxidation stimultated by daylight, and that the observations could have
nothing to do with electrical charge.  Who knows?

David T.


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[biofuels-biz] Well done Aunty Beeb

2003-09-09 Thread David Teal

BBC programme Auto Motive covers issues current on this list.  Recommended
listening at:
http://www.bbc.co.uk/radio4/factual/rams/mon0902.ram



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[biofuels-biz] Well done Aunty Beeb

2003-09-08 Thread David Teal

BBC programme Auto Motive covers issues current on this list.  Recommended
listening at:
http://www.bbc.co.uk/radio4/factual/rams/mon0902.ram


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[biofuels-biz] Where did 3.5 come from?

2003-08-29 Thread David Teal

I was intrigued by the contribution of a few weeks back and copied below.
So I checked back to Mike Pelly and others recipes.  No sign of why 3.5g/l
is the amount of NaOH needed for biodiesel (over  above ffa neutralisation
amount).  Can someone elucididate please?

Keith, quoting Todd on 7th August said:

Most of us who have performed straight base reactions titrate in
order to determine how much compensation must be made to override
the presence of FFAs.
And most of us have relied upon the 3.5 grams NaOH + x formula.
The really fanciful part that few people have given much thought
to in the backyard biodieseler's environment is that catalyst is
never destroyed. It may get bound up, such as with FFAs or
particulates, but if both of those variables are compensated for,
the remaining free catalyst is there to do its job.

So...define the purpose of a catalyst. Essentially adding extra
amounts of catalyst accomplishes virtually nothing save for
reducing reaction times, as catalyst is not destroyed.

Essentially, even in a straight base esterification, it should
only take a gram or less of catalyst beyond the titration
requirement to effect a completed reaction over time. The biggest
problem is that few people want to take the time. One-half gram
of catalyst under heavy agitation might take 24 hours or perhaps
even longer to convert 1 liter of oil.

But the beauty is that if only one-half gram is used, 3.0 grams
are omitted in comparison to some of the tried and true methods
in the biodieseler's bibles.

If you can get rid of this amount of base, you can also get rid
of a relative amount of acid neutralizer, whether it be in a
water wash or the FFA recovery from the glycerin layer.

But the primary benefit of base catalyst reduction to the lowest
possible level (lowest possible level to meet specific demands)
is the reduction of soap formation.

Yes, the base is a catalyst. But yes, it also saponifies
triglycerides - it is conducive to making soap, even in the absence of
FFAs.

The primary trick is to get rid of the FFAs, thereby reducing the
volume of excess base catalyst needed for compensation, then
create a system where time is not the most important
element...where the method of manufacture and the energy comsumed
to create ester manufacture is at a minimum and in balance with
the least possible amount of catalyst appropriate to the specific
application.

If this is 15 gallons expected to react completely in two hours,
the catalyst requirement will be heavy, and so will the soap
manufacture.

If this is 500 gallons expected to react completely in only 24
hours under heavy agitation, the catalyst requirement can be
minimized to extremely small levels, which will in turn reduce
soap manufacture, and in turn, reduce wash problems.

David T.



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Re: [biofuels-biz] Re: Contraction and Convergence

2003-08-24 Thread David Teal

Talking of climate change, have a look at the UK's campaign group activities
and information at:
http://freethesheeple.net/cacc/html/index.html

They also intend to use and promote biofuels

David T.


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Re: [biofuels-biz] any homebrewers or BD for sale along western half of I-80?

2003-08-06 Thread David Teal

Most efficient way to haul extra weight with a small car is to use a trailer
(not USA mobile home, just a garden trailer).  Buy it in California and sell
it in Iowa when it is empty.


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Re: [biofuels-biz] Re: Mixing times for complete reactions

2003-07-30 Thread David Teal

Mark (Girl Mark) recommends these:
 http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=1479

Best

Keith

For UK, try the equivalent here:

http://www.northerntooluk.com/product_detail.asp?c1=Water+Pumpsprodid=10995
5E

David T.


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Re: [biofuels-biz] Separation of water from WVO

2003-07-22 Thread David Teal

Terry Lohnes' original post reported that :

 Right now, I'm experimenting with separation of 80%
 soybean oil, 20% water (emulsified in a blender) using a CaCl salt
 solution at varying concentrations and temperatures.

My concern is that this is not representative of typical water contamination
percentages (more like 1 to 3%) and that there may be an effect analogous to
the famous azeotrope when distilling ethanol.  It may be a great idea, and
salts have other uses in 'rescuing' disastrous biodiesel batches (as
reported by Todd Swearingan some time ago and more recently by Girl Mark).
Can I urge Terry to consider lower water contents in his promised trials?

David T.


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Re: [biofuels-biz] Fwd: Separation of Ethanol from Water

2003-07-15 Thread David Teal

Christopher Phillips reports:
I have found that by adding a small quantity of
Potassium Carbonate to a mixture of Ethanol and Water, the solution
separates into an aqueous phase and an organic phase (the organic phase
being the Ethanol of course).

If this is true, shame on all those scientists who have had folk doing this
the hard way all these years.  Should be easy enough to try, though, and I
might just do that.  One question that comes immediately to mind is how to
distinguish the two liquids; they are both colourless, unless the KCO4 tints
the water.  Otherwise it is back to hydrometers etc.

David T.


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Re: [biofuels-biz] USIS Group One Step Closer to Zero Emission Vehicle

2003-07-14 Thread David Teal

This is quite an impressive achievement, so please don't dismiss it out of
hand.  It is also far more practical than the hydrogen fuel cell car
demonstrated on UK TV's Top Gear programme last night.  The website is at
www.usinduction.com .  Some of us experimented with water mist or vapour
induction systems last year (and earlier), with good results on torque and
fuel consumption.  Next get the Ozzies to test their cars on ethanol or
biodiesel or SVO plus steam :-)

David T.


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Re: [biofuels-biz] diester oil

2003-06-26 Thread David Teal

Levent,
Diester is a confusing name.  The 'di' part has nothing to do with
chemistry, it is just short for 'diesel', while the 'ester' part is ...
well .. ester :-)

David T.


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Re: [biofuels-biz] The Hydrogen hype, the scam artists at work.

2003-06-25 Thread David Teal

Hakan,
Your perspective on hydrogen is probably right and needs saying in public.
You make comparisons with gas from coal.  I remember in the days before
methane was discovered in the North Sea (known as 'North Sea' gas rather
than 'Natural' gas here in Britain by the way), and most towns  cities had
their gasworks sited near the railway, canal or navigable river bringing in
the coal.  In Britain, the Commonwealth and elsewhere the product was known
as 'Towns gas' rather than 'City gas'.  The carbon monoxide content made it
more toxic than methane.  Apart from the points you made, these old gasworks
are among the most polluted sites in the land, with naptha, phenols, tars 
sulphur compounds still in the soil, long after the bad egg smells have gone
away.  The same would apply to gas from biomass (or turkey guts), though
with modern pollution abatement methods I suppose it can be kept under
control.
An interesting side note was that tar from the gasworks was used to surface
roads at bus stops because it does not soften in the oil dripping from bus
engines.
At a meeting a couple of years ago, a delegate suggested that the best
policy for global warming would be to burn all the world's trapped methane
before it escaped into the atmosphere.  Then there is the issue of methane
hydrate on the sea bed..

Dvid T.


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Re: [biofuels-biz] Peugeot takes it's diesel racing on biofuel

2003-06-20 Thread David Teal

Paul,
I recently visited a very large diester plant in Northern France.  Their
feedstock is 100% French grown rapeseed oil, processing flowchart is bog
standard.  Plant is alongside an oil extraction industry, whose output is
40% to food trade and 60% to diester.  Fuel is shipped (by water transport)
to 3 oil refineries for blending with mineral diesel prior to distribution.

Watch this space for news of a UK biodiesel competition sports car.

David T.


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Re: [biofuels-biz] New to biofuels and a quick question

2003-06-18 Thread David Teal

Also in UK, have had the same problem.  Tried angle grinder (eats blades and
VERY noisy), jigsaw better but still somewhat antisocial, and a nibbler
which is great, although it creates thousands of small crescent-shaped
shards of tinplate swarf.  To get the nibbler started, a sharp chisel makes
the initial hole.  The discs go to metal recycling, while the barrels are
flattened out and used to clad over the insulation of the various hot bits
of my biod production plant.  Best way to clean the old oil off is firstly
heat to allow it to flow away and then hot water  caustic soda (you will
already have some of this anyway).
btw, my heat nowadays comes from burning glycerol.

David T.


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Re: [biofuels-biz] Kerry says energy plan a key to national security

2003-06-16 Thread David Teal

Kerry's proposal, which an aide said would cost a net $18 billion
over 10 years, would make cars and trucks more energy efficient by
offering tax incentives for purchases of efficient vehicles and new
incentives for manufacturers to build them.

Meanwhile European manufacturers have been building and successfully selling
'efficient' vehicles for years driven by customer demand rather than
billions of tax incentives.  More cynical than sceptical?

The sixties slogan ya caint beat cubes has long been debunked but seems to
linger on in the American psyche.




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Re: [biofuels-biz] switchgrass to electricity (PR)

2003-05-29 Thread David Teal

Until the numbers get bigger, this possibly qualifuies as greenwash?  Good
idea in principle, though not exactly new.


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[biofuels-biz] H2 from glyc.

2003-05-02 Thread David Teal

Here's an interesting clip from
http://www.eere.energy.gov/hydrogenandfuelcells/pdfs/25315hh.pdf

Results
In earlier work we reported the ease of gasification of glycerol in
supercritical water.Table 2
confirms the earlier result.In it we see that the hydrogen content of the
gas increases from 38%
to 51 %after 3.45 hr,while the methane content decreases from 20%to 11
%.During this time
the total gas yield increased from 1.18 to 1.6 L/g and all the carbon in the
feedstock was
converted to gas.The increasing gas yield is due to the consumption of water
and methane by
the steam reforming reaction.Evidently this reaction is catalyzed by the
reactor's wall and/or the
carbon catalyst,which become more active (i.e.seasoned)as time passes.When
the gas yield
reached a steady state,the feed was switched and sawdust paste was fed to
the reactor for 4
hours.After this,glycerol was again fed to the reactor.Table 2 shows that
the sawdust paste
causes the reactor's wall and/or the carbon catalyst to lose some activity
towards the steam
reforming reaction.
The waste product generated by the commercial production of biodiesel fuel
contains glycerol
and methanol.We prepared a mixture of these two alcohols with a composition
identical to that
of the industrial waste.The gas produced from this mixture (see Table 3)is
very rich in
hydrogen,and the yield (2.05 L/g)is high.The water leaving the reactor was
clean with a pH of
4-5.Evidently,this waste product is a perfect feedstock for hydrogen
production.



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Re: [biofuels-biz] Illinois Approves $1 Billion Clean Coal Power Plant

2003-04-07 Thread David Teal

Last para. of this posting of justification for new generating plant burning
high-sulphur Illinos coal was:

Mead told the lawmakers that ultralow emission technologies that
address all emissions, including carbon dioxide, are in the pipeline.
Such low or zero emission systems may be years away from
commercialization, but the knowledge gained from such studies will
likely have good transfer to improving today's state of the art
systems, Mead said. The eventual application of ultraclean systems
will hold tremendous value to a nation whose greatest fossil energy
resource is coal.

Parallels here surely with the hydrogen fuel debate where near-term
opportunities for ghg reduction are foregone on the premise that something
wonderful is just over the horizon.

David T.


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Re: [biofuels-biz] ethanol biodiesel

2003-03-14 Thread David Teal

Daniel,
I think you will find that water has a greater affinity for ethanol than it
does for quicklime (CaO), so you cannot rely on this to absorb unwanted
water from the mix.  It has been used for neutralising FFAs.  Try an archive
search on 'another way'.
I don't really know the answer to your other question, but your suggestion
that the single-phase product might be diglyceride is superficially
attractive.  Probably there would be monos and tris present as well.  There
are tests for this if you want to get serious.

David T.


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Re: [biofuels-biz] finally, a James Woolsey interview.... coversmore than one proposed alt-fuel-bio-fuel solution

2003-03-11 Thread David Teal

James wrote:
WOW!  There is a market for FFA's ..
http://www.changingworldtech.com/techfr.htm
I would have never guessed.  Now how to sell it in bulk following glyc
seperation.
James Slayden

Unfortunately, the process produces FFAs rather than consuming the little
blighters, per the following quote pasted from their website:


FATTY ACID OILS
The TDP process is capable of producing significant quantities of fatty
acids from agricultural and forestry feedstock. Fatty acids are carboxylic
acids derived from or contained in animal or vegetable fat or oil. Fatty
acids are used in a wide range of applications: detergents, soaps, cleaners,
stabilizers, industrial surfactants and pharmaceuticals, personal care
products, lubricants and rubber products. The fatty acids produced by the
TDP process are primarily palmitic, stearic and oleic acids.

David T.


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Re: [biofuels-biz] bubble drying- big correction

2003-01-26 Thread David Teal

Mark,
When you raised the bubble-dry issue a few weeks back, I wasn't convinced
that the main action was necessarily water evaporation.  I tend to store
samples of biodiesel in capped 2 litre Dr. Pepper style plastic bottles, and
had noticed that if an air space is left above the liquid, it always reduces
in volume, partially collapsing the bottle.  My surmise has been that a
oxidation process was at work, where the oxidation products are liquid, and
the oxygen is removed from the air.  I have also noted that if the sample
strarted hazy, it would clear at the same time, not always with a
preciptated residue of water or anything else.  It would be interesting to
test for oxygen depletion in the air pocket.  I did try a rudimentary test
to extinguish a burning taper (like we did at school chemistry lessons), but
this was not conclusive.

David T.


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Re: [biofuels-biz] waste oil burners bu rning glyc erine,Ê ffa'sÊ

2003-01-26 Thread David Teal

Tom, Mark,
For comparison, my glyc. burner is a converted natural gas water heater from
my brother's house.  It started with one Babbington nozzle fashioned from a
soup-spoon, with air supplied from a 12 volt tyre-inflating compressor.
Enough ambient air is entrained by the atomising jet to complete combustion,
but it can blow back if the wind is in the wrong direction.  It now has an
additional air blower to keep the flame front away from the nozzle.  It runs
very well on biodiesel, less well on pre-heated SVO, and poorly on
pre-heated glyc alone.  I tried mixing fuels in variable ratio using a
tee-piece in the supply line, but adjusment was too critical.  Next version
will have 2 Babbington nozzles (probably tea-spoons), one for biodiesel and
one for pre-heated glyc.  The atomised spray jets will converge into the
centre of the combustion tube.  In this way the fuel mix can be controlled
more easily, and the temperature can be brought up to a steady high value
before introducing the glyc.
Heat is removed by a pumped water circuit and transferred to WVO heating and
meth recovery stills.  With abundant heat, it should be possible to distil
XS meth from biod as well as from glyc. There is then no dissolved meth in
the washwater, which is otherwise a potential pollution hazard.

David T.


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Re: [biofuels-biz] waste oil burners burning glycerine, ffa's

2003-01-14 Thread David Teal

Several contributors have spoken about drip plates.  I was advised by a
prof. of fuel science that dissolving 5% water in the glyc. would cause it
to vaporise explosively on contact with the hot plate, so improving
atomisation and combustion completeness.  Obviously, you would lose the
latent heat in the steam, but at 5%, that would be rather small.  Anyway, it
would be quite easy to try for those with a working furnace.

David T.


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Re: [biofuels-biz] waste oil burners burning glycerine, ffa's

2003-01-14 Thread David Teal

Hi David

Was he talking specifically about glyc, or about the complete
by-product, with soap/FFA and catalyst?

Best

Keith

I buttonholed him over canapes at a seminar, so could not be that specific.
I had the impression that the technique would work with any liquid fuel that
was miscible (or emulsified) with water.

David T.





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Re: [biofuels-biz] oil @ $33 per barrel

2003-01-06 Thread David Teal

James wrote:
actually MM, Rayon is made from corn starch and some nasty chemicals.  :)
I seem to recall Rayon being made from coal in the UK, in the days before
North Sea Oil.

David




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Re: [biofuels-biz] butanol process and biodiesel biproduct

2003-01-06 Thread David Teal

Thanks, Paddy.  I always understood that the dark colouration was due to the
FFAs.  What do you reckon is in the by-product apart from glycerine, alcohol
and a few salts?  If oleic (and other?) FAs are soluble in esters, does this
account for the variation in colour between batches (base-base process)?
Are they water-soluble?

David, I'm not convinced that the 'the mixture of FFAs and glycerol that
combine in our 'by-product'.' that you mention does actually contain FFA. I
recently aquired a sample of 95% pure oleic acid and found that it was
completely soluble in biodiesel. Also, other FFA's will be solids which
would be visible as solids as soon as the mixture cooled down. Personnally,
I don't have any other explanations, although I'm sure there are others more
qualified to comment  Paddy






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Re: [biofuels-biz] Re: butanol process

2003-01-02 Thread David Teal

I wonder whether this would work on the mixture of FFAs and glycerol that
combine in our 'by-product'. i.e. with no triglycerides present.

David T.


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Re: [biofuels-biz] Australian ethanol and sustainability!

2002-12-29 Thread David Teal

At last a note of sane reality injected into this thread from Harry.
Thanks, this is one I don't have to immediately delete.  I believe there
have been parallel arguments in Brazil concerning the ecological
consequences of large-scale sugar production.  Keith will doubtless
reinforce the appreciation of danger in large-scale anything from mining to
monoculture agriculture like oil palm.  Maybe the answer is indeed in
smaller-scale distributed enterprises, but this is quite difficult for
governments to get to grips with.  There is much lip-service paid to SMEs by
politicos in Brussels, London, Washington (World Bank as well as USA) etc.
but the reality of support is a plethora of reports and rather little action
on the ground.

David T.


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[biofuels-biz] Burning sunflowers

2002-12-21 Thread David Teal

Quote from the Leeds University alumni magazine www.leeds.ac.uk/alumni :

Fuel and energy researchers are hoping to use sunflower oil to produce
hydrogen, a fuel of the future.  Hydrogen has been attractive as a fuel
because it can create electricity with no harmful emissions.  Most methods
of producing the gas, however, create pollution.  Researchers are testing a
pollution free system using only sunflower oil, air, water vapour and two
special catalysts.

David T.


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Re: [biofuels-biz] Fwd: Biodiesel question

2002-12-21 Thread David Teal

Please reply direct to Daniel.

Keith
Someone please tell Daniel that any bus can become a 'biodiesel bus' simply
by putting the right fuel in its tank.

David

We are interested in contacting a biodiesel bus organization or interest
for
a possible eco-tour of Los Angeles using a biodiesel bus. Can anyone put us
in contact with appropriate parties in the LA area?

Thanks,


Daniel Escalzo
The Green Festival




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Re: [biofuels-biz] skin on biodiesel

2002-12-12 Thread David Teal

Lots of interesting chemistry coming out of this thread, but I do wonder
whether the answer might not be in the physics rather than the chemistry of
the process.  Possibly the glycerol has not fully settled when the upper
layers of ester are syphoned off.  Then, when the lower level is exposed to
cold air, the entrained glyc. solidifies into the reported skin.  Why not
try a longer (or warmer, with better insulation) settling period before
racking off?

David T.


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Re: [biofuels-biz] Film on the ethanol issue in Australia

2002-12-11 Thread David Teal

I have only limited experience of ethanol as motor fuel.  Mine was hydrous
(around 165 deg. proof) and immiscible with petrol.  The car ran well enough
after opening out the carb. jet, but the corrosion of metal and plastic
components was very severe (just as decribed in the article).  I have always
ascribed this problem to the water content and assumed that all those
Brazilians stay happy motorists because their fuel suppliers use A3 sieves.
My suggestion, therefore, is to be sure the tests reported by the
anti-ethanol press declare the water content of the blend under evaluation.
Ethanol is hygroscopic anyway, so an actual measurement has to be made, and
not a simple reliance on a supplier's statement.
As for reports of knocking, this is most surprising given the high octane
number.  Indeed, most authorities suggest advancing ignition timing and/or
increasing compression ratio to take advantage of this.  In other words,
engines are less likely to knock on alcoholic fuel blends.

David T.


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Re: [biofuels-biz] Small-scale ethanol

2002-12-04 Thread David Teal

I have had a car running on home-made ethanol, but abandoned the project in
favour of biodiesel, mainly on cost grounds.  There is, however, another
aspect of ethanol which disquiets.  Most proponents cite the carbon dioxide
released during fermentation as some sort of advantage, saying it promotes
plant growth or can be used to make fizzy drinks.  No mention of either:
*Its role as a greenhouse gas or
*The loss of energy in all that carbon
In one sense, fermentation  is a cold combustion process so we are
squandering a decent part of the energy in the original feedstock sugars.

Or have I got it all wrong?

David T.


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Re: [biofuels-biz] Diesel Car Emissions May Increase Global Warming

2002-10-28 Thread David Teal

This flies in the face of conventional wisdom, which maintains that aerosols
like soot actually reduce warming by reflecting solar radiation back into
space.  Even black particles do this by re-radiating infra-red having been
warmed themselves.  I don't like to discuss conspiracy theories, but this
looks like a prime candidate.

David T.


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Re: [biofuels-biz] Potential hazard to engines

2002-09-22 Thread David Teal

Jaques raised a very good question back on 5th Sept., and as a non-chemist I
was looking forward to seeing what the answer would be (something about
polymerisation perhaps).  A related problem seems to have arisen with very
high pressure common rail systems (1600 Bar).  These issues must be
addressed or we are going to be discredited by the petrolhead fraternity:

Greetings,

Speaking with an engine mechanic working for my local Caterpillar dealer, I
was told that a customer using Biodiesel had come in for service due to
engine failure. Upon inspection, it was evidenced that an injector seal had
failed thereby allowing some biodiesel to come in contact with engine oil.
Apparently that contact caused a resulting mixture similar to tar which
failed the engine.
Does anyone have any information if indeed mixing biodiesel with motor oil
would cause a tar like substance, and if so why?

Thanks for any info.

Jacques Sinoncelli






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Re: [biofuels-biz] Southern States Power Co. Participates in the Formation of theAgua Mansa, Bioenergy L.L.C.

2002-09-09 Thread David Teal

The interesting part of the report is below.  Is this feasible I wonder,
given the different iodine and cetane numbers in the two standards.  Mind
you, the plant hasn't actually been built yet, so I guess they can say what
they like ;-)

 Agua Mansa is designed to produce biodiesel that will not only meet
ASTM standards but also the more stringent DIN 51606 specifications,
allowing the fuel produced here to be introduced in virtually any
market in the world.

Also, not quite happy about world-wide distribution.  One of the benefits of
biofuels is local production for local consumption.  Please don't just
replicate the old oil industry picture.


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Re: [biofuels-biz] Re: hi ffa feed stocks

2002-09-07 Thread David Teal

One fact in common to all the recent contributors to this thread has been
the bad effects of water produced in the acid esterification of FFAs;
including saponification in the subsequent base transestrification stage.
Most of us like to keep things simple, so I contemplate a boiling operation
between acid and basic stages to evaporate the unwanted water.  This would
apply to our Scottish lard chip fat supply.  The energy burden need not be
too onerous using heat exchangers to recover some of the sensible heat
(latent heat can't be easily recovered), and by using glycerol as heating
fuel.  I am a little worried about what boiling sulphuric acid (albeit
dilute at this stage) will do to ordinary piping and vessel materials.

David T.


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Re: [biofuels-biz] Re: hi ffa feed stocks

2002-08-22 Thread David Teal

Thanks for your response, prof. Allen.  I'll formulate an inquiry to
Mohammed Farid as you suggest.  You mentioned Thai railway application. I
saw somewhere that German railways are using SVO in some of their shunting
engines.
The encouraging part of your message is you are reacting at 60C and that
this is near methanol boiling point.  That implies you are succeeding at
atmospheric pressure. Do you use conc. sulphuric acid first stage?  I agree
meth recovery is so simple that using excess is not really a problem.

David T.


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[biofuels-biz] Re: hi ffa feed stocks

2002-08-20 Thread David Teal

In Scotland, chip shops use lard (animal fat).  Last week I took a quantity
of such material and tried (admittedly without much confidence) using the
same procedure as for WVO (2 stage base).  Nothing doing, as expected.  I
was hoping Aleks' acid/base method would be the answer, but from Todd's
reply we might need HTP.  Any experience with lard anyone?

David T.


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Re: [biofuels-biz] catalytic converters

2002-08-02 Thread David Teal

Thanks to everyone who contributed to this thread.  I have sent Paddy's
reference to yer man.  Here's hoping..

David T.


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[biofuels-biz] Cat converters

2002-07-31 Thread David Teal

A prospective biodiesel user (waste management contractor) operates a fleet
already fitted with catalytic converters.  Can anyone please point to an
authoritative reference which confirms that the fuel and the device are
compatible?  Obviously the workers are in close proximity to the tailpipe
emissions, which makes it the perfect application.  I just need to convince
the fleet manager that his cat won't die.

David T.


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Re: [biofuels-biz] Re: Engine makers, refiners can meet US diesel rule - EPA

2002-07-02 Thread David Teal

Steven wrote:
Harry, fascinating stuff. Where did you get your Australian info from? I
would love to see the reports. I have suggested to quite a few farmers that
the introduction od LSD  ULSD is going to give us farmers a bit of trouble
based on every one elses woes, but no-one really thinks it will be a
problem.

Steven

Probably what will happen in USA will be the same as Europe.  Early adopters
of ULSD like Canada and Sweden did indeed have problems with loss of
lubricity and with loss of rubber vulcanising properties.  These were solved
by introducing lubricity additives and by auto makers changing the type of
rubber used in fuel systems.  Only France is different (as usual!) where
they add 5% bio to ULSD instead of synthetic lubricity restoring additive.
I believe the poor lubricity is not due to loss of sulphur so much as the
hydroprocessing used to remove it, which alters some of the other compounds
responsible for lube properties.

David T.




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Re: [biofuels-biz] DOE Grant

2002-06-10 Thread David Teal

Todd wrote:
David,

I'm trying to get a handle on what yesterday's technology is
relative to biodiesel manufacture.

Esterification and transesterification technologies aren't going
to be changing much more in the future than they have in the
recent past. And even if a few improvements in CP or catalysts
occur, the wheel is still going to be round, invaluable and
profitable.

Todd Swearingen

I have agreed with most of what you said to Tom.  The new technologies
include biological (enzymes) and phyical (UV, u'sonic) methods, algae
feedstock and such like.  This is distinct from fine-tuning our present
processes with heat exchangers, vacuum distillation etc.  The
batch/continuous question is irrelevant, although it would be interesting to
hear how Simon Wells' miniature continuous processor is coming along.

David T.



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Re: [biofuels-biz] DOE Grant

2002-06-08 Thread David Teal

Tom,
Camillo reckons 250,000 gal/yr is too small to be economic based on European
experience.  Please bear in mind that Europeans enjoyed a lot of EU
financial support and possibly illegal tax breaks in their home markets.
Therefore they did not have to hone costs in anything like the way you have
done at Yellow.  I would suggest you could be right in thinking this is a
good size, looking at the Australian and British scenes, which started later
and had to be leaner with far less financial help.
My second point is that this forum is very concious of promising research
into new and better pathways for triglyceride to ester conversion, so it
would take a brave person to invest heavily in yesterday's technology.  This
is not meant as any sort of slight on Camillo's offering nor on the
appropriateness of reminding us of it.  Indeed, the same could be said of
Pacific's technology as mentioned by Keith.

David T.


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Re: [biofuels-biz] Is 10% EthOH, 10%water, 20% bio, 60% dieselthe ultimate blend?

2002-05-24 Thread David Teal

Are you sure about this, Keith?  I have tried to mix hydrous ethanol (about
80%) with biodiesel by shaking in a glass jar, and found that they separate
again.  Also, I have seen references to far lower biodiesel water
solubilities than the 1200 ppm reported by Camillo (e.g. 7 ppm).
As for the coarse filter to let through the emulsion, there must be a
downside to that surely (risk of abrasive particles).

David T.


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Re: [biofuels-biz] Fw: RETROFIT ETHANOL VEHICLE

2002-05-18 Thread David Teal

K. Vishwanath wants to devise dual-fuel capability for petrol  100%
ethanol.  I did this 2 years ago in order to use 170 proof (15% water)
ethanol without the need to dehydrate it.  This is good fuel but will not
mix with petrol.  My approach was to:
1.Fit a 3-way valve to the inlet manifold in place of the original carb
2.Onto one branch was fitted the original carb
3.Onto the other branch was fitted a similar carb modified for ethanol
4.Both carbs were linked to same throttle and choke cables so they
opened and closed together
5.Vacuum advance tube was connected to both carbs via a tee piece
6.To change from petrol to ethanol, you simply rotate the 3-way valve so
that the induction airflow is drawn through the other carb.  Fuel is only
sucked from the float chamber when air is flowing through the carb.
6.Modifications to the carb were radical enlargement of the jet orifice
and replacement of rubber seals with nylon parts.

Unsolved problems included corrosion of ali and steel parts, especially the
float chamber, and finding space in the engine compartment.  With modern
vehicles mostly having fuel injection, the scope for this type of
application is declining.  The project was abandoned in favour of biodiesel,
which has better economic ratios where I live.


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Re: [biofuels-biz] Digest Number 230

2002-05-15 Thread David Teal

Tom's reply is very interesting.  I have been looking at the Babington stuff
too, and now realise that it would ideal for co-firing glyc. with bottled
propane.  The propane gas could be fed directly into the ball instead of
compressed air, inter-alia saving the need for a compressor.  I've not had a
chance to try this, but suspect that some air would be needed as well to get
the right balance of atomisation and heating value.  So long as the gas
pressure remains above the air pressure, it should be simple enough to meter
gas into the air line.  I intended to apply for a research grant on glyc.
burning, and this new idea might be just the thing to hang the application
on.  What is the patent position?

Going back to the Mother Earth drip-feed design, I hope to dilute the heated
glyc with about 5% water, in the expectation that flash boiling of water in
the droplets on contact with the hot plate will burst them into a finely
atomised mist.

David T.

Tom wrote:
I've been doing several postings on that other web site on this topic, so
here is my input on this topic. The Babington burner works great for raw
oil,
ugly biodiesel, or other fluids, but it will not burn glycerol in
concentrations greater than about 20 or 25%. It seems that this stuff is
water based and just doesn't have all of the energy needed to sustain a
flame. I had considerable success last winter in burning it on a wood fire,
but by itself it would only burn the volatile part and then leave a
substantial vegetable gum residue that did not burn.

My current plan is to build a masonry burner that maintains the 1000 degree
temperature needed for complete combusion. The Babington will keep up the
temperature using raw oil and the glycerine will be dribbled into a pan
where
it should burn cleanly, leaving a mild residue ash.  All of this is theory,
but I have hope this system will work after 2 years of efforts.

Tom Leue @ Homestead Inc.






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Re: [biofuels-biz] Digest Number 230

2002-05-14 Thread David Teal

Chuck wrote:
What to do with all the Glycerin?  Egads!  BURN IT!  many, many BTU's
there.
Wait a minute...maybe we should pump it back into the ground where all the
oil came from to prevent earthquakes =:-O

I agree, but how to do it safely and in a way that the useful heat can be
recovered.  I am experimenting with this, starting with a 'Mother Earth'
waste oil furnace design (which you can get to from Keith's site).  It would
be of interest to many here if anyone has experience of burning glyc.  The
problems are to ensure a uniformly high temperature to dissociate ALL the
acrolein and to either avoid or easily handle the 'coke'.

Any takers?

David T.








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Re: [biofuels-biz] Suppliers?

2002-04-29 Thread David Teal

Please, no more bickering you two heroes!

Multipurpose degreaser, eh?!  That's a great idea and presumably doesn't
attract EPA strictures in USA.  Do your customers enjoy degreasing the
insides of their fuel tanks I wonder.  Sorry, how would you know?

David T


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Re: [biofuels-biz] Re: Vacuum

2002-04-11 Thread David Teal

Motie,
Youre on the right track with corrugated culvert pipe.  I have done some
work on resistance of pipes to external pressure, and have a design
spreadsheet somewhere.  Otherwise, you can find good guidelines from AWWA
(American WaterWorks Association) for thin-wall pipe with external
stiffening rings.  The material is way off yielding in direct compression,
but you need to restrain it against buckling.  A cheaper and easier way of
doing this is to select 2 concentric pipes of different diameters and fill
the annulus with concrete.  That sort of composite is very stiff, but you'll
never lift it!

As for keeping the vapour hotter than the liquid, your scheme will
eventually overheat the liquid and either kill the yeast or denature the
enzymes.  Why not put a cooling coil in the liquid?

Keep up the good work
David T.


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[biofuels-biz] Vacuum

2002-04-10 Thread David Teal

Motie-d was asking about vacuum pumps, fridge compressors etc for vac
distillation.  One idea I have toyed with is inspired by the famous
Magdeburg experiment where air was expelled from a vessel by boiling water
in it. The steam replaces the air.  When the vessel is cooled again, the
steam condenses and there you have a very low pressure (vapour pressure of
water at ambient temp).  It occurs to me that the same could be applied to
vac distillation by connecting a strong vessel (the steamer/condenser) to
your evaporation chamber and controlling the pressure in the latter by a
valve in the connecting pipe.

I dont think there is any patent on this one!

The condensing vessel need not be excessively large as, once the evaporating
ethanol/water mix is at the desired temp  press, the vapour produced is
re-condensed in the reflux still so the net volume change is minimal.

David T.


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Re: [biofuels-biz] electric lift pumps

2002-02-14 Thread David Teal

Phil,
Try www.thomasautos.co.uk
Neil Eldridge is service director and very knowledgeable.  Thomas Auto
Injection are agents for the Stanadyne range of US-made goodies, which I
think would include what you are looking for.
David T.


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Re: [biofuels-biz] Generally Stalled Motors

2002-02-11 Thread David Teal

Tom, it's probably not time for guerilla biodiesel, but there are PLENTY
of environmental advocacy groups who would espouse your cause.  Pressure,
especially independent and well-publicised, on your administrators is the
best chance to get them to reconsider their INTERPRETATION of the rules they
have to operate.  It's amazing how the same words can mean different things
sometimes.  Best not to antagonise (or antagonize possibly) anybody or push
them into a corner from which they cannot budge without losing face.
Your website has been an inspiration to many.  Choose your advocacy groups
with a little care, and see how you go.  PLEASE dont just give up.

David T.


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Re: [biofuels-biz] Mother Earth News Waste Oil Heater

2002-01-11 Thread David Teal

Had a good look at this with a view to burning glycerol (after recovering XS
methanol).  If anybody has actually built one of these, perhaps they will
have some advice on how well it works..and on what fuel.  Any
temperature estimates?

Combustion air is admitted via the pre-heating chamber on the flue, but I
would be apprehensive about gases escaping in the reverse direction,
particularly at start-up  shut-down.  Fan assisted air might help raise
combustion temperature to avoid acrolein, but positive pressure in the
furnace body is undesirable due to outward leakage of gases. On the other
hand, a fan assisted flue would be very hot.  Perhaps the best might be for
a tall flue stack to gain a good natural draught.

Any ideas before we start cutting metal?

David T.


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[biofuels-biz] Palm kernel oil

2002-01-03 Thread David Teal

I have been offered 4.5 tonnes of unused palm kernel oil from an ice cream
factory which is closing down.  It is a hard solid at ambient temperature
and normally stored at 50C.  The offer will expire, and I'm not sure whether
to take this material as I have no experience with processing exotics.  Any
advice from list members who have transesterified palm kernel oil for
biodiesel would be much appreciated.

David T.


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[biofuels-biz] Ideas Applications

2001-12-20 Thread David Teal

Some interesting stuff here for builders of biodiesel processors

 http://www.oilmiser.com/ideas.htm

David T.


[Non-text portions of this message have been removed]


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Re: [biofuels-biz] Fw: VIRUS

2001-12-20 Thread David Teal

This sounds like the hoax we had a few months back.  Suggest investigate
before deleting possibly essential system file.


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Re: [biofuels-biz]

2001-12-08 Thread David Teal

Tony,
This is a common question with a multitude of answers, none of them very
good at the moment.  The main options seem to be:
1Sell or give it to craft soap makers
2Become a craft soap maker
3Consolidate your output with others and have it refined/distilled into
commercial grade glycerine.  This process is not practical at a small scale.
There is also a danger that the market will experience a glut of glycerine
and the price will drop
4Get the methanol out of it and compost the rest with other compostable
biomass
5Burn it to produce heat.  The problems here are that unless the
combustion temperature is at least 600C, toxic acrolein gas is released, and
there is a tendency to coke up the furnace components.

My bet is that combustion in an appropriately designed and operated furnace
is most likely to be the best plan.  Somebody was working on a fluidised bed
combustor which seemed like a promising idea, but news of that project has
dried up.

David T.


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[biofuels-biz] Any comments? - You think petrol grows on trees?

2001-11-10 Thread David Teal

no nitrogen? must be burning in a pure oxygen atmosphere ;-)

Steve Spence

Either that or combustion temperature is much lower than usual, which would
be less thermodynamically efficient.  Dont mock USM.  I have had other
dealings with them and they are in the first or second rank academically.
In fact they were veg. oil fuel pioneers 10 or more years ago.

Aeolus


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Re: [biofuels-biz] enzymes

2001-11-08 Thread David Teal

Paddy wrote:
Glad to see there's some interest in this method of 'biodiesel' production.
I think you're right that it would no longer be called biodiesel, there's a
company called Ebony solutions in Chester, UK that produces what it calls
'E-diesel'

Of course Ebony has access to a very consistent feedstock oil from Sharwoods
popadom bakery.  I recall that enzyme processing is specific to a narrow
range of fatty acid constituents, and that seems to be a major barrier to
its wider exploitation.  A potentially fertile area for research, therefore,
would be to isolate a cocktail of enzymes (lipases) which would convert a
wider spectrum of feedstocks.  I would suggest (implore?) anyone with the
right influence to promote such research at their academic or commercial
laboratory.  Meanwhile, why not mince up a couple of pig pancreases and see
what can be done at a practical level with your own favorite veggie?

Aeolus


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Re: [biofuels-biz] Coco Diesel Technology

2001-11-05 Thread David Teal

Hints of more efficient and less costly processes than the traditional
NaOH/methanol approach should be taken seriously.  Remember the porcine
lipase thread of a few months back?  Anyone investing strong money in plant
reliant on the traditional approach must accept the risk that it may become
obsolete.  That is not to say it will stop working, just that it may become
less competitive in cost, and hence be a 'stranded asset', in the way that
coal-fired power stations have.
This is one good reason to think twice before paying large sums for packaged
plant as offered by some Middle European players.  There are other less
risky ways to make biodiesel production profitable, and I am very actively
working on this.

Aeolus


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[biofuels-biz] Re: drying oil

2001-09-22 Thread David Teal

A question of rheology.
Much recent talk of using centrifuges, spray dryers etc. to remove water
from oil.  If the oil, water and other minor constituents were Newtonian
fluids of differing density at room temperature, there would be no need for
any of this.  Simple gravity settlement would eventually stratify them for
easy separation.  Heating seems to help, which suggests that some of the
minor constituents fuse (melt) at temperatures between 20C  80C.  But
heating alone seems not to be the complete answer.  A centrifuge does 2
things: it increases the gravity acceleration many times over; and it
vibrates a little (sometimes more than a little).  Merely increasing 'g'
will not cause separation of fluids which do not separate under normal
gravity.  The fact that centrifuges DO appear to work must therefore be due
to the vibration.  This would be logical if the minor constituents are
non-Newtonian and exhibit a yield stress characteristic.  The vibration
would create transient stresses within the mixture of fluids.  If the peak
stress is greater than the yield stress, then shearing can take place and
settlement can progress (quickly in a centrifuge or slowly in a simple tank.
My proposition, therefore, is that we should forget centrifuging and stick
to gentle heat and vibration.  As an aside, Simon (or was it Martin?) has
reported that the vibration caused by attaching his air pump to the side of
the bubble washing vessel seemed to improve that process. Hmmm does anyone
really know the answer?

David Teal


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Re: [biofuel] Bio washing

2001-06-04 Thread David Teal

James wrote:
I'm thinking of tapping off from the base of the washing vessel and
pumping the water / bio back into the top of the vessel via a
domestic shower head. Has anyone tried this?
I'm also wondering what I can do with the residual water after the
cleaning process is completed.
 James

I think this is a good idea, though I have not tried it.  Water here is
'hard' and foaming is not a problem with bubble wash.  Washwater can be used
as a mild weedkiller.

David T


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Re: [biofuel] Green Party Battle Bus

2001-06-02 Thread David Teal

my local parliamentary candidate knows about biodiesel.  His url is:
http://www.eastkent-greenparty.org.uk/elections/richardboden.htm
Unfortunately, there is no direct email address, although I know he has
one..just can't find it at the moment.  No harm in going through his agent I
guess.

David T.


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[biofuels-biz] Off-spec product

2001-05-31 Thread David Teal

Terry Biofuels wrote in the other list:

No real need to boil after washing - if you want, take it up to 80 deg C
and
most water will drop out.
Murkiness is probably tallow esters, if temperature is below 8 deg C and pH
is 7.  Warm slightly, when it will disappear.
Allow tallows to settle for a week - draw off from top and use 100% - mix
the lower murky layer with warm petrodiesel to achieve cold weather
properties.
This is not sacrilege - any petrodiesel replaced is good petrodiesel!

which exemplifies a question which will arise in small-scale commercial
production.  As in any process, a certain amount of product will be off-spec
and therefore unsaleable. Nevertheless, such 'seconds' may be perfectly
useable in-house by operators vehicles.  It is therefore worth keeping
records of the quantity of off-spec likely to be produced so it can be
compared with anticipated in-house consumption.

Any comments?

Aeolus





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Re: [biofuel] Re: magnets in fuel line.

2001-05-30 Thread David Teal

John Li makes a convincing, if subjective, case for there being a shortfall
in the octane rating of locally supplied petrol in Philippines.  Surely this
is a golden opportunity to go for ethanol blending (gasohol) which is IMHO
the best way to raise octane rating.  Somebody ought to pick up on this and
make his/her mark.

David T.


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Re: [biofuel] Re: Reclaiming the methanol

2001-05-25 Thread David Teal

Dale is right, recovered methanol is OK to re-use.  I have found that from
biod made using 15% meth (v/v WVO), the glyc. yields 3% meth (v/v WVO) and
is well worth the trouble of simple distillation at 70 deg C.  Probably will
use 20% in future for an easier life without unnecessary loss of costly
reagent.

David T


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Re: [biofuel] Engine oil and ADDITIVES

2001-05-23 Thread David Teal

Quote from a MAFF report:
12
1.0.iii Oil Crops - Markets
The total world production of vegetable oils is over 85 million tonnes, with
more than 80%
originating from soya bean, oil palm, rapeseed, sunflower and coconut.
Whilst the majority of
this oil is used in the food industry 25% is used in non-food or technical
applications, by the
oleochemical industry.
Oil Crop market areas
Lubricants
It is reported that around 740,000 tonnes of lubricants are used in the UK
each year, whilst
the EU market for lubricants is reputed to be some 4.5 million tonnes (59).
Of these, over
580,000 tonnes (13%) are unaccounted for after use and presumably lost to
the environment.
The loss of hydraulic oils is believed to be around 8% whilst for engine
oils the figure proposed
is 34%. Further to this the European Environmental Agency has estimated that
around 260,000
tonnes of oil are lost in the North Sea each year (59). It therefore seems
logical that vegetable
oil-based lubricants are perceived to have the greatest competitive
advantage in total loss
systems e.g. chain bar oils, two stroke marine engines, drilling muds,
agricultural greases and
possibly in applications where the risk of loss is high. e.g. certain
hydraulic systems.
In such cases their negative impact on the environment is much less than
that of mineral oil-based
lubricants. Although they are more expensive than mineral oil-based
lubricants, less is
needed per tonne of wood cut, so the cost is no greater. However, their
extensive use in these
contexts is likely to be dependent on specific environmental legislation (as
is the case in
Germany and Switzerland). Nevertheless, since April 1995 the UK's Forestry
Enterprise (a
division of the Forestry Commission) has adopted a policy of using
environmentally-friendly
lubricants to lubricate chainbars and chains, in both their motor manual
systems and automated
harvesters. The UK's Environment Agency is also keen to promote the use of
more
environmentally-friendly products.
At the 'Lubricants from oilseeds workshop' held in London on 9th May 1996,
Dr Harold of
Lubrizol International Laboratories stated that the estimated potential EU
market for
biodegradable lubricants was in the region of 370,000 million tonnes (10).
However, to date
only a fraction of the market (35,000 tonnes) is actually derived from
vegetable oils (see also
Table 1.4).


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Re: [biofuel] Model Engines

2001-05-22 Thread David Teal

Martin Brook wrote:
A company called Irvine do them in theUK. Irvine Engines Ltd, Unit 2,
Brunswick Ind. Pk, New Southgate, London, N11 1JL.  I've lost their number
but directory enquiries have it.

As a long-time model flying enthusiast, I have, of course been experimenting
with biofuels in model engines with the following results:

Glow plug fuel (conventional) is 0% to 15% nitromethane, 20% castor oil
(and/or synth), the rest methanol.  Ignition is by exothermic catalytic
heating of methanol on hot platinum alloy coil (glow plug), in addition to
compression heating.  To take advantage of biod's great lubricity plus
ability to burn, I tried a straight mix of biod + methanol.  Of course they
do not mix, so this approach is NBG.  (This must also be the reason most of
the XS meth ends up in glycerol rather than in the biod.)

Model diesel fuel (conventional) is 30% ether, 20% oil, 50% paraffin.  I
tried a few alternative mixes and found 75% biod, 25% ether worked OK.  Note
the complete omission of separate lubricant.  No sign of overheating or
siezing even with prolonged running on several different engines (I have
quite a collection, including some of the excellent Irvine diesels which are
no longer made, just glow motors now).  Power was noticably down on
conventional fuel and I had the (subjective) impression that it wasn't
burning fast enough.  Exhaust residue much less than normal, and rather
sticky.  My flying companions thought I was having a barbeque from the
smell.

If Jeremy still wants to demo his fuel with this type of model engine, I
suggest he enlists the help of an experienced model flyer, as there is a
certain knack to starting and adjusting them.

 model airplane engines are retrofittable to run on diesel fuel. the kits
are
 available at certain model store. they may not be that cheap though.
 anton
 --
 From: Jeremy Shuey [EMAIL PROTECTED]
 To: biofuel@yahoogroups.com
 Subject: [biofuel] Model Engines
 Date: May 11, 2001, 9:05 PM
 

 Does anyone know where a person could buy or build a
 working model of a diesel engine?  I want to use the
 engine to burn the biodiesel that I make in
 demonstrations and also be able to do some testing
 with it.  Any information would be appreciated.  Also,
 the less expensive, the better.  ;-)  Thanks in
 advance.
 
 Jeremy
 



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Re: [biofuel] Diesel engines - running on biodiesel

2001-05-18 Thread David Teal

Exactly right, it's called pilot injection and is an alternative to fitting
spark plugs when using gaseous fuel such as from a wood gasifier or any
other source.  Fuel use in the pilot system can be rather minor once the
engine is warmed up.
David T.

As I understand it, Diesels running on gaseous fuels such as NG have the
normal injectors for liquid fuel and also have some sort of gaseous fuel
distribution system in the inlet stream.  A small amount of liquid fuel is
injected to start combustion.

Don Bowen [EMAIL PROTECTED]
Valley Center, CA Senior Software Engineer




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[biofuel] LAXative?

2001-05-17 Thread David Teal

Los Angeles International Airport (LAX) announced Monday
that it will start turning its food waste into electricity through a
six-month pilot program. The airport currently ships as much
as 7,800 tons of food waste to landfills each year. Through
the new pilot program, the waste will instead be shipped to
the Hyperion Treatment Plant, run by the Los Angeles
Department of Public Works, where a digester will convert
the waste into methane and carbon dioxide. The methane
will then be piped to a power plant and burned to generate
electricity. See the press release at:
http://www.lawa.org/html/LAWA_show_news.asp?news=208.




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Fw: [biofuel] Dale's machine

2001-05-12 Thread David Teal

The subject of vacuum pumps seems to have come up again.  Here's a repeat of
an earlier post which had no response at the time
- Original Message -
From: David Teal [EMAIL PROTECTED]
To: biofuel@egroups.com
Sent: Monday, January 22, 2001 1:31 PM
Subject: [biofuel] Dale's machine


 Yes, Dale's biodiesel processor setup as described on his website looks
very
 useful.
 http://home.swbell.net/scrof/Biod_Proc.html
 One aspect might be more than a little daunting for backyard experimenters
 though.  Not everyone has friends with a spare vacuum pump, so I should
like
 to share an idea I am working on for just this purpose.  Any model
aircraft
 engine (2 stroke or 4 stroke) can be made to work as a vacuum pump.  All
you
 need to do is:
 *Remove the glowplug to reduce heat generation by adiabatic
compression
 *Spin the engine with an electric motor
 *Connect the vacuum tube to the air intake
 *Connect an oil supply to the needle valve (biodiesel is good lube)

 This setup certainly works, but I haven't tested it to the 25hg mentioned
 by Dale.

 David Teal


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Re: [biofuel] Re: Enzymes

2001-05-09 Thread David Teal

David Reid wrote:

Perhaps one ot two of you English guys should try tracking Edgar Woollatt
(Consultant, British Executive Service Overseas and formerly Development
Manager, Lever Bros Ltd, Cheshire) down. He is probably in his 70s I imagine
and may no longer be up with the play but would be a goldmine of
information. How about you Simon Wells?

I am a BESO member, and could possibly try to track him down.  There are
people in their 70s who are pretty sharp, EW could be one of them.

David Teal


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Re: [biofuel] Vapour Carburetion

2001-05-05 Thread David Teal

Another way anybody can estimate the power needed to keep their vehicle
moving at constant speed (air resistance + rolling resistance) is to coast
in neutral down a long hill.  Note the terminal speed reached, the weight of
the vehicle, and check on a contour map to find the gradient of the downhill
road.  I have done this, and found:
*The same vehicle will be faster when heavily loaded (makes sense)
*Different vehicles of similar weight reach different terminal speeds
(aerodynamics)
*15 hp for 60 mph quoted by David Reid is a reasonable figure

Power = force * distance/time
force = weight of vehicle * sine of road gradient
distance/time = speed

Not too hard if your units are consistent.
I have been slightly amused by the Vapour Carb dialogue, exemplifying the
process by which men eventually solve paradoxes.  Carnot is the limit for
any heat engine.

David T


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Re: [biofuel] Re: foggers

2001-05-01 Thread David Teal

Hi Munir,
I know Malaysia quite well, used to visit Ulu Perak every year (tin mining 
small hydro) and Sabah a couple of times.  It may be that during your humid
monsoon seasons there may be not much benefit from the fogger, but the hot
dry season could be a different story.  Anyway, it will be good to get your
feedback.

David Teal

hi david  dick..
i just fitted a fogger using dick's system few hours ago. it is the
simplest of all fogger i've come accross. thank's dick:)..i'm using a
honda integra 80's model using carburetor. i kept it as a secret to
my friends. but hey, they notice that my engine run quiter. well
david, at least rather than nothing. i'm staying in malaysia
(tropical climate). in a few day, i'll get result on how much gas
saving the fogger can give me.
regard's..
munir..




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[biofuel] bio-diesel pump

2001-04-30 Thread David Teal

Who wanted to see a bio-diesel pump?

 http://europa.eu.int/en/comm/dg17/atlas/html/body_biootech.html


[Non-text portions of this message have been removed]


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Re: [biofuel] more windpower

2001-04-22 Thread David Teal

Here is my patent spec. for noise reduction of wind turbines.  I hope this
will allow more of them to be used, as it mitigates one of their public
acceptability problems.
http://l2.espacenet.com/dips/viewer?PN=GB2353825CY=gbLG=enDB=EPD

David Teal


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Re: [biofuel] Re: small diesels and filtering fat

2001-04-22 Thread David Teal

Kevin,
There is not likely to be any water in 350 F oil.  If you can insulate your
barrels, then you would not need to re-heat before starting with the acid
(or other) transesterification.  No need to filter at this stage, you can do
it later, either between transesterification stages or at the end.
Everthing will cool down during washing, but you should filter again after
drying.

David T


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Re: [biofuel] more windpower

2001-04-22 Thread David Teal

robert luis rabello wrote
I found the site.  Please check out the following link:

http://www.wvt.de/englisch/index.htm

They claim the start up speed with NO LOAD is .3 meters / second.  I
looked at the power curve on the site and it didn't seem like they were
making any outrageous claims for low wind speed performance.  The genny is a
peculiar looking thing, however!

I had a look at this.  It has indeed a strange blade configuration, which
possibly explains why the performance graph is unlike any conventional wind
turbine.  Instead of power increasing with the cube of windspeed, the
relationship is not much better than linear.  I would guess that at tip
speed ratios away from optimum there is excessive drag, which severely
restricts output torque at higher windspeeds, and is probably noisy despite
the designer's denial.  Despite the above criticism, I actually quite like
the design, as it seems to use centrifugal force to maintain blade shape a
bit like a Darrius, and the drag feature is good safety for storm survival.
In other words, not efficient, but a different way to a practical result.

David T







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Re: [biofuel] BD glycerol validation

2001-04-19 Thread David Teal

Still banging on about quality control:
If the Aladdin test is NBG, then how about making a micro-batch from
supposedly finished biod (reacted, washed  dried).  Possibly use the
methoxide mixer as a reactor vessel, otherwise an insulated 1.5 litre coke
bottle if you don't mind getting some arm exercise.  Use some left-over
methoxide with the heated biod feedstock.

The possible results would be:
*Nothing visible:OK
*Soap formation:   biod was not quite dry
*Glycerol drop-out:   oil was not fully reacted

The micro-batch would be high in methanol, but can be added to the next main
batch.

David Teal


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Re: [biofuel] BD glycerol validation

2001-04-18 Thread David Teal

Micheal has a very good point here, and I have had a few thoughts on a
practical measure for residual glycerol.  My suggestion makes use of the
fact (true??) that glycerol does not burn at 200 to 500 deg.C, but esters
do.  The test, then, is to put a known mass of biodiesel into a simple oil
lamp burner, with a wick.  Then light the lamp and allow it to burn down to
a lower known mass.  Any glycerol content of the biod which has burned will
have accumulated in the wick.

The Aladdin test, then, is to weigh the wick before and after the burn and
so get a measure of glyc content.  Obviously, some refinements will be
needed, but I reckon the basic principle is OK for home laboratory use.  Try
it before and after washing y'all.  Any other ideas?

David Teal


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[biofuel] Fraud alert

2001-04-18 Thread David Teal

DIESEL FUEL FRAUD UNCOVERED
Millions of litres of low-quality fuel has been sold as
diesel in a sophisticated fraud, reports say. Up to 50m
litres of lubrication oil has been laundered in an
industrial-scale operation in the north of England and sold
cheaply to petrol stations. Customs officers are now
preparing prosecution orders amid fears the trade is
linked to terrorism in Ireland.






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Re: [biofuel] Re:(More efficient )way of making biodiesel

2001-04-12 Thread David Teal

Blackboard chalk?  Plaster of Paris?  Concrete?  nothing too exotic please

   I think that diat. earth as a carrier is good enough.

Yeah, little animal skeletons, hollow inside. Made of calcium, aren't
they?

Diatom skeletons are mostly silicon. However, coral is calcium-based.
-- 
...Warren Rekow




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Re: Re:[biofuel] (More efficient )way of making biodiesel

2001-04-12 Thread David Teal

Aleks,
I visited Ljubljana University in the days of Marshal Tito, and still have
the second hand book I bought there.  That is the image I recall when
reading your valued posts :-)

David Teal


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Re: [biofuel] Spirit hydromter in UK

2001-04-05 Thread David Teal

Standard wine-making hydrometer measures from 1.150 to 0.970 sg.  This is no
good if you want to measure 0.85 sg spirits.  However, you can fashion a
float from closed cell blue foam or similar to place under the hydrometer.
Sand it down until it reads 1.150 when immersed in water.  This gives an
offset of 0.15, so the range becomes 1.000 to 0.820  sg QED.

David Teal


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Re: [biofuel] (no subject)

2001-04-04 Thread David Teal

A few books on the subject of biogas:

A Chinese Biogas Manual ed. Ariane van Buren
Uses diagrams and pictures to shiow how the basic design of the biogas pit
can be adapted for construction in different soils, from sandstone to sheer
rock, which should encourage developing countries to embark on their own
biogas programmes.
ISBN 0 90303 165 5

Running a biogas programme: A handbook by David Fulford (one of my ex
tutors)
Describes the designs and uses of biogas plants, with technical appendices,
for domestic and community plants.  Likely economic and social effects of
biogas programmes are described from experience, and advice given in the
problems of management.
ISBN 0 94668 849 4

These and others on the same subject can be ordered through:
http://www.itpubs.org.uk

David Teal


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Re: [biofuel] Help for setting up fuel cell energy source for small village.

2001-03-29 Thread David Teal

350 kWh/month = 0.5 kW average
A 2 kW wind turbine battery charger with 25% utilisation factor would be an
obvious choice.
It can be duplicated when demand rises (as it undoubtedly will).  Then
agricultural residues can be returned to the soil instead of messing around
at such small scale.

David T


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[biofuel] Blue stone blues

2001-03-28 Thread David Teal

There has been talk about disintegration of the blue aquarium stones used
for bubble washing.  This is unfortunately true, but there is a quick and
cheap remedy.  Discard the stone and its soluble plastic connector.  Empty
the contents of a tea bag through a small hole.  Push the air tube into the
hole in the tea bag and wire it up tight.  Wind a lead weight round the tube
nearby to make sure it sinks.  Fire up the pump and there you have it.  QED

David T


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Re: [biofuel] ENERGIES... week of 3/18/01

2001-03-27 Thread David Teal

Steve said:
1000 watts over what time frame? if its 1kwh/ hour, that's 24kwh/day, or
720
kwh/month. that's enough for some homes

You will find this contrast between kWh/day per home figures quoted for
North American and European settings.  It is OK, but does reveal the
voracious consumption your side of the pond.

David T


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Re: [biofuel] Comments needed

2001-03-23 Thread David Teal

All this engine stuff is very nice (really!) but the easiest way to reduce
your fuel consumption on the highway is to leave early, drive a little
slower, and tuck in behind something big.  It is quite noticable how you can
lift your right foot without losing speed when you come up behind a
juggernaut.

David Teal


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Re: [biofuel] Re: criminals, brown's bomb, hydrogen fusion, and ph measurements ...(#339)

2001-03-22 Thread David Teal

I did make a mister (Novak's baby) for my 2,8 litre Vauxhall Royale petrol
car.  It probably works too well and consumes a litre of water/ethanol mix
in a few miles.  It also makes the engine race in neutral, so I put a valve
in the suction line to reduce the flow rate.  I don't use this thirsty
vehicle enough to have come to any conclusion as to its effect on
performance or economy.yet.  Provisionally, I subscribe to the theory of
better combustion of the complex hydrocarbons, possibly with a catalytic
reaction in there somewhere.

Dick, have you abandoned the original mix in favour of straight water?

David Teal


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Re: [biofuel] Jerry - aquatic generator

2001-03-19 Thread David Teal

Yes, Jerry is right (again!), forget your paddlewheel idea, it will be
hopelessly inefficient, being a drag machine :-(
The barge should either have a vertical axis 4-blade rotor below it or,
preferable, a longshaft sub-horizontal rotor trailing behind.  A highly
recommended reference with good photos etc. is at:
http://www.caddet-re.org/assets/no83.pdf

OK, not on topic, but good stuff anyway

David Teal


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Re: [biofuel] Re: Gum?, wax?, soap?, glycerol?

2001-03-11 Thread David Teal

Alecs asked:
First which Two step method? Base-base or acid-base?

You got alakline glyc there. Glyc is not solid at room
temp, but with all this lye floating arroun, it's gel like. The base-
base two stage glyc burned, because it was fluid. It was fluid
because of lots of methanol in it. Once lighted it burns with a
strong, hot, yellow flame (sodium ions). After burning it leaves a
black gum residue, which has to be removed from the burner. The same
happens to the injector tips of your engine if you use not thoroughly
cracked bio (min 95% crack).

I had 3 answers to my question, suggesting gelatin, glycerin and alkaline
glyc.  (Alecs, the base-base method was used).  As the solution is strongly
alkaline, I think the last one is probably it.  Todd noted that excess
methanol was burning in my crucible, and this brings us round to easy ways
to recover this costly ingredient.  I was impressed by Dale Scroggins'
vacuum distillation method, and wonder whether anyone else has experience of
this.  Can it be done just on the residue after decanting off the oil (much
smaller volume to handle)?

David Teal


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Re: [biofuel] Methanol Help

2001-03-02 Thread David Teal

Terry mentioned methane hydrate, the solid stuff.  With global warming now
inevitable, it is important that these rich resources of fossil fuel should
be captured for use soon, otherwise they will vaporise to methane in the
atmosphere and become a VERY potent cause of further warming.  We've got a
positive feedback timebomb with this stuff!

Despite our common interest, I believe this issue is potentially more
important than renewable and carbon-neutral fuel making.

David Teal


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Re: [biofuel] Methanol Help

2001-03-02 Thread David Teal

 Hi David
 I keep hearing of this. Do you have some good references?
 TIA
 Keith Addison

From http://jin.jcic.or.jp/trends98/honbun/ntj980623.html.
(as Keith lives in Japan :-)
The worldwide total of methane hydrate is estimated to be equivalent to 250
trillion cubic meters of methane gas. Research on this substance has been
active overseas since the early 1990s, but attention is focused more on its
potential to contribute to climate change than to provide energy. If
temperatures were to rise on a global scale, causing some permafrost to
melt, then massive amounts of methane would be released into the atmosphere
to aggravate global warming. This would create a relentless cycle by melting
yet more permafrost, thereby releasing even greater amounts of methane.

From http://marine.usgs.gov/fact-sheets/gas-hydrates/title.html
The worldwide amounts of carbon bound in gas hydrates is conservatively
estimated to total twice the amount of carbon to be found in all known
fossil fuels on Earth.

From http://www.unsolvedmysteries.com/usm36060.html
Our enviroment is in deep trouble these days. Emmissions from burning fossil
fuels from coal, oil, and gas have polluted our atmosphre. Higher than
normal amounts of the greenhouse gas Carbon Dioxide has been suspected to be
causing global warming. But is it really worse than that? Maybe carbon
dioxide should be our least concern. Locked inside of the oceanic crust of
the Earth, there are deposites of a substance known as Methane Hydrate.
While it's usually frozen in the underwater depths, some of it in gasous
form can escape from the ocean floor and come near the surface. It's been
known to sink ships, since it can lower the boyancy of the water, and the
ship is unable to float. But to make matters worse, methane hydrate is also
a greenhouse gas, and it's unknown exactly how much of it there is
underwater. Scientists say that while carbon Dioxide can raise the global
tempiture up to 5 degrees F in the next 100 years at it's present rate of
increase, Methane Hydrate can raise it 13 degrees in only 10 years. The
climate could be ruined, crops will fail, storms will get worse, and in less
time than anything humans can do. And while we can control CO2 Emmissions,
Methane Hydrate is nautral, and unstoppable, should it happen. However,
Methane Hydrate can be used to do good. It is a combustible substance, both
in solid and gas forms. And it burns much cleaner than fossil fuels can.
While we don't have the technology to begin extracting large amounts of it,
maybe in the future, it can be an alternative energy source. Carbon Dioxide
will be reduced, and the harmful Methane Hydrate would be used up, so it
couldn't cause much damage to the world. The atmosphere could become a much
cleaner place.


- Original Message -
From: Keith Addison [EMAIL PROTECTED]
To: biofuel@yahoogroups.com
Sent: Thursday, March 01, 2001 6:54 PM
Subject: Re: [biofuel] Methanol Help


 Terry mentioned methane hydrate, the solid stuff.  With global warming
now
 inevitable, it is important that these rich resources of fossil fuel
should
 be captured for use soon, otherwise they will vaporise to methane in the
 atmosphere and become a VERY potent cause of further warming.  We've got
a
 positive feedback timebomb with this stuff!
 
 Despite our common interest, I believe this issue is potentially more
 important than renewable and carbon-neutral fuel making.
 
 David Teal




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