Marc,
it is true that the trans-esterification process will partly eliminate the
polymerization properties of highly unsaturated fatty acids.How did you
establish the iodine number ?
What kind of oil as raw material are you talking about ?
But there are still some things to attend to:
Highly unsaturated fatty acids can be quite aggressive to the material in
the fuel system. If you want to play it a little safer, mix the BD with BD
of a more saturated oil.
Jan Warnqvist
AGERATEC AB
[EMAIL PROTECTED]
+ 46 554 201 89
+46 70 499 38 45
- Original Message -
From: Marc Arends [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Sunday, August 21, 2005 8:06 PM
Subject: [Biofuel] Iodine value, polymerisation and oxidation
Hello,
My WVO consist of 80% polyunsaturated oil and i calculated that this has
an
iodine value of 150. But when i look at the table National standards for
biodiesel, found here
http://journeytoforever.org/biodiesel_yield2.html#biodstds
you see the iodine value of BD should be on avarage less then 120. Which
makes my BD not suitable for my car cause the BD will undergo
polymerisation.
You also read on the webpage that oil with a iodine number above 50 will
damage your car. Found here
http://journeytoforever.org/biodiesel_yield.html.
On the other hand i red this article stating that Trans-esterifying
triglyceride oils and fats with monohydric alcohols to form biodiesel
largely eliminates the tendency of the oils and fats to undergo
polymerisation and auto-oxidation and also reduces the viscosity of the
oil
to about the same as petroleum diesel.
Found here http://www.shortcircuit.com.au/warfa/paper/paper.htm
My idea was to mix my high polyunsaturated BD with mineral diesel until
it
does no demage to my car, but i now i don't know how much of each i should
use.
Can anyone help me please, i am very confused.
Greetings,
Marc
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