Re: [Biofuel] Biodiesel

Fri, 12 Aug 2005 02:43:31 -0700

Hi Ian,
 
Solidification is generally a bad thing to have happen to your BioD. Solid BioD doesn´t flow so your engine cannot start. Although it is possible that it might store for longer periods of time. That idea just popped into my head. I have no idea if it´s true but it would make sense as solids react (degrade) more slowly in general than liquids.
 
Tom Irwin

From: Ian & Theresa Sims [mailto:[EMAIL PROTECTED]
To: Biofuel@sustainablelists.org
Sent: Thu, 11 Aug 2005 18:09:17 -0300
Subject: Re: [Biofuel] Biodiesel

Hi Tom
Let me see if I 've got this right. BD made with Animal fat solidifies at a higher temp than WVO? This could be handy info as a lot of the chippies here use lard.Fortunatley I think I've got onto a source of WVO. Diesel prices in NZ are now a $1 pL for your interest
Ian
----- Original Message -----
From: Tom Irwin
Sent: Thursday, August 11, 2005 1:56 PM
Subject: Re: [Biofuel] Biodiesel

Hi Ian and Theresa,
 
Definitely have to agree with Todd here. I´ve been doing a lot of work making BioD from animal fat. It resolidifies at relatively high temperatures. I left 2 liters in a hood in my lab over winter break. They turn off the heat here cause we rarely get freezing temperatures. We have a few days down to about 5 degrees C and some as high as 22. When I returned to the lab it was chilly again and the BioD was a yellowish white solid. With the heat on the last two weeks it´s liquified and looks just like it did originally but I haven´t engine tested it yet to see if it still really is BioD.
 
Tom Irwin
 

From: Appal Energy [mailto:[EMAIL PROTECTED]]
To: Biofuel@sustainablelists.org
Sent: Wed, 10 Aug 2005 19:44:42 -0300
Subject: Re: [Biofuel] Biodiesel

> tell me how long Biodiesel will keep after production.

Keep it in an airtight vessel with only enough head space for thermal
expansion and contraction and it will be sufficient beyond this time
next year. More probably well beyond that. At least long enough for the
fallout to settle, a season's worth of rains to soak it in and you to
plant another crop so you can do whatever it is that you feel you must
do that can't be done without an infernal combustion engine.

Spec it to10 microns filtration and be happy. After that, it's not the
sediment that will grab you by the short and curlies but the saturated
esters (from animal fats and hydrogenated oils. Depending upon the
parent stock, your filter could be throttled by "B-100" at temps as high
as 40*F.

Last time we rendered deer tallow and made biodiesel from it we were
stonewalled after an overnight temp of 56*F.

Todd Swearingen



Ian & Theresa Sims wrote:

> Does anyone tell me how long Biodiesel will keep after production.
> Can someone clarify the final filter process after production. Some
> say 5 microns some say 10. Mike pelly's recipe dosn't seem to say
> anything about it? And how long should it stand or can you pour it
> straight in?
> Cheers Ian
>
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