[Stoves] Vegetable oil or biodiesel?

[Richard Stanley]

Dear Nathan, Steven, Crispin,AD et al.,
Thanks for all your inputs on t caustic add no add issue: I will keep it simple then--the standard low heat /filter, then 80c heat with radiato line heat exchanger starting on petro diesel then switching to veggie oil ad reverse for shutdown …no NaOH: Be in touch end next week with findings.
from Lushoto.
Richard 
 
On Nov 10, 2011, at 9:37 AM, Nathan Lorenz wrote:

> 
> Sent from Nathan's BlackBerry
> 
> Nathan Lorenz
> Vice President of Engineering
> Ph: +1-970-214-3331
> Skype ID: nathan.lorenz
> Nathan.Lorenz at EnviroFit.org
> 
> -----Original Message-----
> From: "Crispin Pemberton-Pigott" <crispinpigott at gmail.com>
> Date: Wed, 9 Nov 2011 16:44:09 
> To: 'Discussion of biomass cooking stoves'<stoves at lists.bioenergylists.org>
> Reply-To: Discussion of biomass cooking stoves
> 	<stoves at lists.bioenergylists.org>
> Subject: Re: [Stoves] Vegetable oil or biodiesel?
> 
> 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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