Joe,
Keep in mind that I had a 1M. piece of copper tubing submerged in the
BD for over 3 months. I have a cubie of BD that was still crystal clear
after 2 months (the longest I have stored BD other than the polymerized
stuff) and it will go in the car.
The 50+ gal (200L) of BD in question is burning in my oil-fired boiler.
I'm about half way through it and with the temps getting cooler it should be
gone soon. Good riddance to it.
I like the silver lining you found in what looked like a grey cloud.
Tom
----- Original Message -----
From: "Joe Street" <[EMAIL PROTECTED]>
To: <biofuel@sustainablelists.org>
Sent: Friday, October 06, 2006 1:12 PM
Subject: [Biofuel] Polymerization of BD- more than copper to be
concernedwith.
> While looking for info on IR spectra, I found this excellent paper;
>
> http://nationalbiodieselboard.com/resources/reportsdatabase/reports/gen/19970612_gen-234.pdf#search=%22biodiesel%20methyl%20ester%20wavenumber%22
>
> Which talks about issues surrounding fuel contamination and deposits.
> An earlier thread had comments from Tom Kelly regarding copper ions
> causing polymerization. According to this paper other metals such as
> aluminum and iron can catalyze polymerization when biodiesel is stored.
> This news is good and bad. The bad news is I think it is impossible to
> avoid these metal ions. Even if the system is all plastic or plastic
> lined I bet the WVO feedstocks are already chocked with metal, and the
> fuel will pick up metals in the vehicle anyways. This means that
> biodiesel should not be stored. DUH. Didn't I read that on J2F years
> ago? The good news is that the polymerization is slow at room
> temperature. This is also good news because it means that the folks who
> are trying to produce massive quantities of biodiesel are going to have
> a BIG problem that they just cannot solve because they need to store and
> transport the product. And their product has a poor shelf life. Hmmm. Of
> course the home brewer who can make fuel locally and use it immediately
> doesn't have to worry. Yaaaay. Chalk one up for sustainability.
> Uh I guess we already knew this eh Keith? But I never thought of it as
> a problem for big oil until now.
>
> Joe
>
>
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