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Main Title The impact of methanol and CNG fuels on motor vehicle fuel toxic emissions /
Author Black, Frank. ; Gabele, P.
Other Authors
Author Title of a Work
Gabele, Peter.
CORP Author Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab.
Publisher U.S. Environmental Protection Agency, Atmospheric Research and Exposure Assessment Laboratory,
Year Published 1991
Report Number EPA/600/D-91/240
Stock Number PB92-110378
Subjects Automobiles--Motors--Exhaust gas ; Automobiles--Motors (Compressed-gas) ; Methanol as fuel ; Air quality management
Additional Subjects Automotive fuels ; Methanol ; Compressed gases ; Natural gas ; Toxic substances ; Exhaust gases ; Clean Air Act ; Motor vehicles ; Exhaust emissions
Library Call Number Additional Info Location Last
NTIS  PB92-110378 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 17 pages : charts ; 28 cm
The 1990 Clean Air Act Amendments require that the Environmental Protection Agency investigate the need for reduction of motor vehicle toxic emissions such as formaldehyde, acetaldehyde, benzene, 1,3-butadiene, and polycyclic organic matter. Toxic organic emissions can be reduced by utilizing the control technologies employed for regulated THC (NMHC) and CO emissions, and by changing fuel composition. The paper examines emissions associated with the use of methanol and compressed natural gas fuels. Both tailpipe and evaporative emissions are examined at varied ambient temperatures ranging from 20 C to 105 F. Tailpipe emissions are also examined over a variety of driving cycles with average speeds ranging from 7 to 48 mph. Results suggest that an equivalent ambient temperatures and average speeds, motor vehicle toxic emissions are generally reduced with methanol and compressed natural gas fuels relative to those with gasoline, except for formaldehyde emissions, which may be elevated. As with gasoline, tailpipe toxic emissions with methanol and compressed natural gas fuels generally increase when ambient temperature or average speed decreases (the sensitivity to these variables is greater with methanol than with compressed natural gas). Evaporative emissions generally increase when fuel volatility or ambient temperature increases (however, the relative contribution of evaporative sources to the aggregate toxic compound emissions is small).
Caption title. Includes bibliographical references (p. 15-17). Microfiche.
Contents Notes