, September 06, 2002 4:44 PM
Subject: Re: [biofuels-biz] Re: hi ffa feed stocks
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
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
Dear Keith,
Actually I did understand this, having checked it
out a bit and
discussed it with a few people, but I understand it
even better now -
thanks! What puzzled me and mainly why I asked was
what you said
about methanol excesses. For the whole process,
Aleks uses rather
less
Dear Keith,
Actually I did understand this, having checked it
out a bit and
discussed it with a few people, but I understand it
even better now -
thanks! What puzzled me and mainly why I asked was
what you said
about methanol excesses. For the whole process,
Aleks uses rather
less
Hi Michael
(Sorry to be a tad pedantic and maybe a bit
long-winded but it sort of goes with the patch as a
Visiting Professor here in Thailand!)
Not at all, not long-winded, nice clear explanation, I'm sure a lot
of people will appreciate that.
Actually I did understand this, having checked
Hi Keith,
In answer to your question:
Lets start with a litre of oil.
Ours has a density of 910.9 grams/litre so a Free
Fatty Acid content of 5% on a weight basis means that
5% of that 910.9 grams is FFA
So one litre of oil with a FFA content of 5% (weight
basis) contains 45.55 gms of FFA
Dear Marco,
I presume that you have read the
http://journeytoforever.org/biodiesel_svo.html and
their stuff on ethanol? It is an excellent place to
start and concisely sets out all the major
constraints.
Our work with agricultural engines showed that there
is a considerable difference between
Hello Michael
snip
Incidentally, with respect to the high free fatty acid
feeds, the limit to the amount of FFA possible is
probably related to the formation of water in Alek's
first stage esterification using sulfuric acid as the
catalyst. Thus 5%FFA in the oil means that 4mls of
water are
Dear Marco,
I have plent of Palm Oil. When you mentioned that
you used Straight
Palm Oil you hadn't transerterificate the oil?
That is correct. The first stage of our program was to
demonstrate that oil-palm growers could run their farm
machinery on straight palm oil (SPO)by making simple
Dear Michael,
tks a lot for your help. So, we can use palm oil direct without
transes.?
WHich motor modifications do you usually do?
Do you know how to do the sme process with Ethanol? Or anyone who
does it?
regards,
Marco
--- In [EMAIL PROTECTED], Michael Allen [EMAIL PROTECTED] wrote:
Dear Michael,
I have plent of Palm Oil. When you mentioned that you used Straight
Palm Oil you hadn't transerterificate the oil?
regards, Marco
--- In [EMAIL PROTECTED], Michael Allen [EMAIL PROTECTED] wrote:
Dear David,
We did extensive work last year on heated Straight
Palm Oil (SPO)
Dear David,
We did extensive work last year on heated Straight
Palm Oil (SPO) in two-wheeled tractors and fishing
boat motors. We had field trials by local farmers of
four commercial tractors and did test-bed work with
three others. Crude palm oil caused erosion of the
pistons by late ignition
We would be using standardised WVO, with FFA 10% to dilute the
greasetrap oils (from 85% FFA to N%FFA). However, this may not prove
economically viable. I will keep you informed of the results of any
experiments performed as to FFA limits.
I noted in Keith's link, an option that may be the
Hi David,
[EMAIL PROTECTED] is running a research project
on transesterification of beef tallow. I'm not sure he
has heaps of results from his enzymatic process yet
but he certainly has references to all the literature
you need. (Mohammed is an Associate Professor of
Chemical Engineering at the
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
Still in regard to FFA, I will be blending in some wvo to bring the
levels down to a more managable level.
Would most appreciate any indication of maximum ffa level that could
be handled by a 2-stage acid-base reaction, at standard pressure/60
degrees C (to minimise capital/running costs).
Still in regard to FFA, I will be blending in some wvo to bring the
levels down to a more managable level.
Would most appreciate any indication of maximum ffa level that could
be handled by a 2-stage acid-base reaction, at standard pressure/60
degrees C (to minimise capital/running costs).
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.
http://www.wired.com/news/technology/0,1282,53591,00.html
Choo-Choo
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
: movember [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, August 19, 2002 9:03 PM
Subject: [biofuels-biz] Re: hi ffa feed stocks
I am able to source large quantities of the high ffa feedstock
(FFA
85%), however initial miniature tests (1 litre batches using
Aleks'
two stage Acid/Base
: Tuesday, August 20, 2002 10:14 PM
Subject: [biofuels-biz] Re: hi ffa feed stocks
The high-ffa feedstock is from industrial food waste and grease
traps. It doesn't smell very nice either!
Out of interest, what is the upper limit of FFA that would be
suited
to standard pressure, ~60 degrees C
I am able to source large quantities of the high ffa feedstock (FFA
85%), however initial miniature tests (1 litre batches using Aleks'
two stage Acid/Base method) have proved unsuccessful.
Would the same process, under high Temperature/Pressure, be
sufficient to convert feedstocks of this
]
To: biofuels-biz@yahoogroups.com
Sent: Monday, August 19, 2002 9:03 PM
Subject: [biofuels-biz] Re: hi ffa feed stocks
I am able to source large quantities of the high ffa feedstock
(FFA
85%), however initial miniature tests (1 litre batches using
Aleks'
two stage Acid/Base method) have proved unsuccessful
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