||ManTech Environmental Technology, Inc., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. National Exposure Research Lab.;Department of Energy, Washington, DC.
EPA and DOE initiated cooperative study of alternative fuel vehicle emissions and their implications for air quality in 1991. This paper describes studies of the atmospheric photochemistry of motor vehicle exhaust emissions with reformulated gasoline fuel. Alternative fuel (e.g., methanol, ethanol, and natural gas) benefits must be contrasted with those of reformulated gasoline. The results of indoor (using an array of fluorescent lights to simulate sunlight) chamber irradiations of vehicle exhaust are reported. Time profiles of NOx, ozone, PAN nitric acid, and aldehydes are reported. Tertiary butylformate, a transformation product of MTBE emissions, is also examined.