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Hello Golan and all,
from experience I can tell that the
methanol test as described on the JtF homepage rather well corresponds to the
result you will have from the test according to the EN 14214 regarding the ester
content. However, if the methanol test shows e.g. 1 ml (4%) of undissolved oil
in the measuring glass, you can expect an ester content of 92-94% according to
the EN norm. In order to meet the norm with an ester content of min 96,5%, the
methanol test will have to show no undissolved oil at all.
pH measurements are difficult and the
right conclusions from these measurements can be even harder to
draw.
But, a "neutral" BD can have a pH value of
anything between 4,5 -7, depending upon which other substances are present in
the BD. It is also important to know that the pH scale is logarithmic when
judging the results of the measurements.
If a WVO has a pH value above 7, it means
that there are alkaline compounds present, probably tenside remains. The
way of succeeding with biodiesel production goes through an accurate raw
material control, adjusting the recipe and process details according to
that.
Good luck to you !
Jan Warnqvist
AGERATEC AB
+ 46 554 201 89
+46 70 499 38 45
----- Original Message -----
Sent: Sunday, January 15, 2006 5:07
PM
Subject: Re: [Biofuel] Jan's Methanol
test
hi joe
iuse the test and it still gives me hadeake .
at list half of the times are not as it should be
im at the begining of the way and it give me direction.
i just put abigger pump and it already looking better
i alsow parchesed a PH tester and i start to take test from old BD
sampels (unwashed)resault 12.2-13.3 how doese that sound?
tested as well somewvo i got 8.4-8.5 i thought it should be acid? have u
got any idea
all the best
golan
On 13/01/06, JJJN
<[EMAIL PROTECTED]>
wrote:
Hi
Joe,
I use every test on JtF to test my Bio and also the the
Hanna
Instruments test for Glycol. I do this every single
batch. I have never
had any fallout in Jans test to
date.(Knock Knock Knock on wood) ( I
measure it out precisely ) I have
graduated to the base/base method and
have had absolutely great results.
That said I got into a washing awhile
back that was not as good as I
like so I investigated and found that I
am dealing with FFA's that are
higher than I want. I am moving to the
acid/base learning
phase for that. I did also learn that if I pour the
WVO that
is liquid and on top at 28 deg F into a bucket and process the
stuff that
gets clumpy (on bottom) I greatly reduce the FFA's in the
oil.
(14% or so lower) compairitably (tests of each done side by side
same
temp same everything except oil and very precise). So in
the
future winter freeze cycles I will cut out the dark top stuff and
save
for Acid processing. I have since adopted this and my bio stands up
to
intense stir washing each and every wash now.( I get clean and clear
at
the third wash but I do go 4 just because) I might add that
after I
take a grab sample from the batch and mix 50% water, then give it
a 30
second shake, it separates into 2 phases in 1 minute or so.(thats at
50
- 60 deg F water) That is my first clue I have a good thing
going.
Hope this helps.
Jim
Joe Street wrote:
>
Hi All;
>
> The other day I threw out a question but it was an
afterthought on
> another thread. Nobody has answered so
here I am trying again on a
> specific thread. I am
interested to know *how many on the list do Jan
> Warnqvist's
methanol test*
> <http://journeytoforever.org/biodiesel_vehicle.html#quality>
and how
> much precipitate do people get? How much is
ok? The description
> states that every 1 ml equals 4%
contaminate and indicates what
> 'causes washing
problems' I have absolutely no washing problems now
> with
the way my reactor is running, my BD has a density of 0.88 , there
>
is a dramatic lightening of color after the split, I get a
reasonable
> amount of glycerine (not that this means a hell of a lot)
but as an
> example, last batch was horrible oil I had to use 15.5
grams of KOH
> per liter oil and I ended up with 23 liters of BD at
the end out of 25
> liters oil. The first wash water was
milky white and the 4th was
> almost like drinking water and the PH
was 7.3 vs 7.4 before washing.
> No detectable 3rd layer formed at any
stage of the process. By all
> accounts this should be good quality
fuel but I will still get a
> little fallout from the
methanol test ( I haven't quantified it yet
> because I didn't do in
in a graduated cylinder but there is definitely
> a clear amber liquid
phase at the bottom on the tube after settling)
>
> So my
question once again is who else uses this test and how is it
> going
for you? Does anyone get a perfect result (no fallout)
from
> this test? And finally should I be concerned by a
couple of percent
> contamination in my fuel?
>
> I did
search the mail archive twice using 'methanol test' and also
> 'Jan
Warnqvist' as keywords, but the returns were not so informative.
>
List members I need your wisdom!
>
> Jan perhaps you are most
qualified to answer but I would really like
> to get a sense of the
percentage of the list members who are running
> this test. So chime
in!
>
> Joe
>
>
**
>
>------------------------------------------------------------------------
>
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>
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>http://www.mail-archive.com/biofuel@sustainablelists.org/
>
>
>
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