Photochemical modeling of the impact of fuels and vehicles on urban ozone using auto/oil program data
- General Motors Research and Development Center, Warren, MI (United States)
- Systems Applications International, San Rafael, CA (United States)
- Mobil Research and Development Corporation. Paulsboro, NJ (United States)
An extensive set of emission tests has been conducted in the Auto/Oil Air Quality Improvement Research Program on different fuel/vehicle systems. These emission tests have been used to model the impact of fuel/vehicle changes on ozone formation in Los Angeles, Dallas-Fort Worth, and New York in 1995 and 2005/2010. Light-duty vehicles are estimated to contribute 28-37% of the peak ozone in 1980/1985, decreasing to 7-18% in 1995, and further decreasing to 5-9% in 2005/2010. Gasoline changes that show promise in reducing the contribution of light-duty vehicles to ozone formation are reductions in olefin content, 90% distillation temperature, sulfur content, and vapor pressure. Results for a methanol/gasoline blend (M85) used in prototype flexible/variable fuel vehicles depend on the assumptions used to project future M85 emissions. A research test gasoline produced less ozone than the M85 cases in Los Angeles and New York and either more or less ozone than M85 in Dallas-Fort Worth, depending on the assumptions. Sensitivity tests for Los Angeles addressed uncertainties in the overall magnitude of emissions from light-duty vehicles, in the biogenic inventory, and in the representation of the atmospheric chemistry. 51 refs., 7 figs., 11 tabs.
- OSTI ID:
- 232453
- Journal Information:
- Environmental Science and Technology, Journal Name: Environmental Science and Technology Journal Issue: 3 Vol. 30; ISSN ESTHAG; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
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