Re: mixture question

Ok, OKAY. We're convinced! Here's another question: We live in SW (Multnomah
Village), and though I want to particioate in the co-op when we get the car,
I'd like to know of the closest retailer of B100. Anybody in my area?

Peter


On 11/28/06, Jeff Brandt <[email protected]> wrote:
>
> I don't see any reason why it would. As far as I know the B20 blend at
> Carson Oil has always been ULSD and I've heard of no problems.
>
> If wax forms at low temps, then I don't see what sulfur would have to
> do with it. Does anyone know if sulfur contributes to cold flow
> properties of diesel.
>
> Currently under great discussion in the industry is problematic water
> content in biodiesel after it has left the factory.
>
> Biodiesel is actually hydrophobic (repels water) at a stable
> temperature. Although changing daily temperatures cause thermal
> expansion and contraction of the fuel. When the fuel contracts it
> becomes hygroscopic and absorbs very small amounts of water from the
> atmosphere (up to about 1200 ppm).
>
> Normally this isn't much of a problem because of the high turnover
> rate at most stations. The fuel just doesn't sit around long enough to
> cause any problems.
>
> But as the temperature drops, the water in the fuel will form ice
> crystals near 32F. These crystals provide sites for nucleation and
> accelerate the gelling of the fuel. It's my understanding that the
> long chain fatty acids are the first to bond and will effectively fall
> out of solution or end up clogging filters.
>
> I've heard that some producers are trying to encourage retailers to
> install decanting breathers on there storage tanks and transport
> trucks to prevent atmospheric humidity from contributing to this
> effect.
>
> Fuel can supposedly be fixed by heating to high temperatures to break
> the water <-> fatty acid bond. Then the water can be removed through
> conventional absorbtion filters. Otherwise a real pain in the ass if
> you had thousands of gallons.
>
> This is my current understanding, if anyone else has a better or more
> complete understanding of this. Please share your experience.
>
> --
> Jeff Brandt
> Sun Break Biofuels, LLC
> mailto:[email protected]
>
> On 11/28/06, Brian Jamison <[email protected]> wrote:
> > Anyone hear of issues mixing the new ULSD with B99?  I haven't been able
> > to confirm a report that wax may result in cold temperatures.
> >
> > -B
> > --
> > Brian Jamison
> > President, Board of Directors
> > GoBiodiesel Cooperative
> >
> > _______________________________________________
> > pdx-biodiesel mailing list
> > [email protected]
> > http://lists.gobiodiesel.org/mailman/listinfo/pdx-biodiesel
> >
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