Interesting..... Which is worse, platinum, palladium and rhodium, or hydrocarbons, carbon monoxide and nitrogen oxides? Biodiesel has greatly reduced levels of hydrocarbons, carbon monoxide and nitrogen oxides, so maybe we are chasing our own tails here?
I'm going to rethink recommending cat converters on b100 vehicles. Steve Spence Subscribe to the Renewable Energy Newsletter: http://www.webconx.com/subscribe.htm Renewable Energy Pages - http://www.webconx.dns2go.com/ Human powered devices, equipment, and transport - http://24.190.106.81:8383/2000/humanpower.htm [EMAIL PROTECTED] ----- Original Message ----- From: "Keith Addison" <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Saturday, December 01, 2001 5:48 AM Subject: Re: [biofuel] catalytic converter question > Hi Craig and all > > More on this, from the archives: > > http://www.planetark.org/dailynewsstory.cfm?newsid=9772 > Planet Ark > Catalytic convertors contribute to pollution-magazine > > UK: February 9, 2001 > > LONDON - Instead of helping to clean up the environment, catalytic > converters used on car exhausts are adding to pollution, a science > magazine said on Wednesday. > > Researchers have found metal from converters in remote areas of > Greenland proving, they say, that it is a global problem. > > "It's not just close to the cities and highways," Carlo Barbante, a > chemist at the University of Venice, Italy, told New Scientist > magazine. > > Catalytic converters convert pollutant gases into less noxious > products. The platinum, palladium and rhodium in the coverters fitted > to cars catalyse reactions that convert hydrocarbons, carbon monoxide > and nitrogen oxides. > > Barbante and his team measured concentrations of the metals in ice > and snow cores from Greenland dating from 1969 to 1988 and from > 1991-1995. > > After comparing the cores to samples dating back 7,500 years, they > found that concentrations of the metals had been increasing since > 1976. > > "Rhodium levels are already 120 times higher than in the > 7,500-year-old ice. Palladium and platinum levels have increased 80 > and 40-fold respectively," according to the magazine. > > Barbante said the ratios they uncovered were similar to car exhausts > found in another study, which suggests the metals originated from > catalytic converters. > > REUTERS NEWS SERVICE > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > Please do NOT send "unsubscribe" messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > > ------------------------ Yahoo! Groups Sponsor ---------------------~--> See What You've Been Missing! Amazing Wireless Video Camera. Click here http://us.click.yahoo.com/75YKVC/7.PDAA/ySSFAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Please do NOT send "unsubscribe" messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
