[Stoves] Vegetable oil or biodiesel?
Crispin Pemberton-Pigott
crispinpigott at gmail.com
Wed Nov 9 15:44:09 CST 2011
Dear Richard
I think if you want to make a fuel you will have to avoid saponification and
I had not given it any thought, but if you add the lye directly to the oil
it will turn some of it into soap immediately so they must have a method of
keeping it pretty thin to avoid that.
I don't think soap burns, certainly not easily. Too much water in it.
I know that heating veg oil an simply keeping it hot for a while causes a
shortening of the chains. I think that is the poor man's treatment. Used
cooking oil has a much lower viscosity than fresh oil, especially compared
with cold pressed oil. There is no reason it could not be used as a stove
fuel after 'desiccation by heat'.
Regards
Crispin
Thanks for that Crispin,
Re used veggie oil for the slow running single lung 5 to 8hp diesels, you
are right on: In thinking abit about it, indeed soap is otherwise made from
lye/ caustic soda/ and tallow.
Wonder how it would do in the faster running diesels eh ?
Will revert from Lushoto (TZ) next week.
Richard
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