2. The Clean Air Act should be modified to remove the
current oxygenate requirement in RFG and oxy fuels.
Discussion: In older vehicles, the addition of an
oxygenate promoted more complete combustion and lower
air emissions. Over the last twenty years substantial
improvement in combustion technology and emissions
controls have been introduced incremental phases.
Since the 1994 model year all vehicles are required to
have optimized combustion to an extent that oxygenates
have negligible effects. As the existing fleet of
motor vehicles continues to turn over, the air quality
improvements that can be expected from the already
obsolete oxygenate requirement will continue to
diminish.
The oxygenate requirement causes an additional
problem. It has become an obstacle limiting the
ability to maximize the total evaporative and tailpipe
emissions from gasoline that could be accomplished by
using different formulations without a prescribed
oxygenate requirement.
Another oxygenate in common use is Ethanol. It is the
chemical name for the ingredient of interest in vodka,
and other fermented beverages. It also is an air
pollutant. When combusted it produces additional
pollutants some of which are HAPs such as
acetaldehyde.


__________________________________________________
Do You Yahoo!?
Yahoo! GeoCities - quick and easy web site hosting, just $8.95/month.
http://geocities.yahoo.com/ps/info1

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
For SC email list T-and-C, send: GET TERMS-AND-CONDITIONS.CURRENT
to [log in to unmask]