Biodiesel causes natural rubber to rot and swell. Older diesel vehicles built for Europe and (probably all) built for US use have rubber parts in their fuel systems. This is OK with the sulphur containing diesel fuels, but isn't suitable for ultra low sulphur diesel fuels. I don't know specifically what it is in ULS which upsets rubber, but happily the necessary fuel system modifications allow the vehicles to use biodiesel.
I think B20 is currently about the best blend. It gives enough biodiesel content to significantly clean-up emissions and it's far more friendly to non bio compatible vehicles. It has also been shown to have a slight positive effect on miles per gallon. B100 has about 10% less calorific value than petroleum diesel, but in use delivers only 5% less mpg. The more consistent fuel molecules and oxygen content improve combustion. Ideally we'd all be running B100 biodiesel, but as we can't currently (if ever) make enough to replace petroleum fuel we might as well let as many people as possible benefit from this clean fuel. Every tonne of petroleum displaced is a few tonnes less CO2 dumped into the sky (I believe every 1T of fossil diesel releases 3T of CO2). Regards Dave --- In [EMAIL PROTECTED], "steve spence" <[EMAIL PROTECTED]> wrote: > there is no sulfur in biodiesel. biodiesel blended with petrol diesel is no > longer "biodiesel". it's B20, B30, etc. > > > Steve Spence > Subscribe to the Renewable Energy Newsletter: > http://www.webconx.com/subscribe.htm > > Renewable Energy Pages - http://www.webconx.com > Palm Pilot Pages - http://www.webconx.com/palm > X10 Home Automation - http://www.webconx.com/x10 > [EMAIL PROTECTED] > (212) 894-3704 x3154 - voicemail/fax > We do not inherit the earth from our ancestors, > we borrow it from our children. > -- > > ----- Original Message ----- > From: "frank" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Thursday, July 26, 2001 10:38 AM > Subject: [biofuels-biz] RFI > > > > > > All. I live in California and am trying to spread the use of bio- diesel. > I recently ran into an issue: The diesel fuel regulations that are > curretnly in place and the new ones on the drawing board. As I undestand > them, the big issue is sulfur. Current Ca. regs allow 150ppm..the new ones > go down to 5ppm. Does anyone know the sulfur content of bio-diesel [b20]? > Is it determined only by the petro-diesel componet of the bio- diesel? > > > > Tx, Frank > > ------------------------ Yahoo! Groups Sponsor ---------------------~--> Small business owners... Tell us what you think! http://us.click.yahoo.com/vO1FAB/txzCAA/ySSFAA/9bTolB/TM ---------------------------------------------------------------------~-> Biofuels at Journey to Forever http://journeytoforever.org/biofuel.html Biofuel at WebConX http://www.webconx.com/2000/biofuel/biofuel.htm To unsubscribe from this group, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
