Reducing ozone: Modeling studies.

  • Published 1995 in Environmental science & technology


Baseline research on fuels and emissions The Auto/Oil Quality Improvement Research Program (AQIRP) has developed data on fuel-vehicle system options that will help legislators and regulators meet the nation's clean air goals through a study program including three components: (1) extensive vehicle emission measurements, (2) air-quality modeling studies to predict the ef­ fects of the measured emissions on ozone formation, and (3) economic analysis of the fuel-vehicle systems. This program is the largest and most comprehen­ sive project of this nature ever attempted. The results of Phase I are summarized below; Phase II is under way and will be reported at a future date. Phase I involved more than 2200 emissions test using 29 fuel compositions in 53 vehicles. The tests measured tailpipe, evaporative, and running-loss emis­ sions and quantified the concentration of 151 different organic compounds plus oxides of nitrogen (NOJ and carbon monoxide (CO). AQIRP is developing an exten­ sive database of information on fuel composition ef­ fects on vehicle emissions, using the hundreds of mil­ lions of data points generated by these tests. Emissions were measured in current and older fleets of vehicles using experimental gasolines formu­ lated to provide a wide variation in total aromatics and total olefin content, oxygenate type and content, sulfur content, Reid vapor pressure, and 90% distilla­ tion temperature (Tgo). Emissions also were measured in prototype flexibleand variable-fueled vehicle fleets using three methanol-gasoline mixtures ranging from MO (0% methanol) to M85 (85% methanol). The emissions data were then employed to con­ duct air-quality modeling studies for New York City, Los Angeles, and Dallas-Fort Worth, using state-ofthe-science models and emissions inventories devel­ oped with standard procedures. In these studies, AQIRP focused on ozone air pollution, the main com­ ponent of urban smog. Extensive refinery modeling studies were made to develop cost estimates for producing various research gasoline formulations. The performance of these exist­ ing models was validated with refinery data from an

DOI: 10.1021/es00001a759

Cite this paper

@article{1995ReducingOM, title={Reducing ozone: Modeling studies.}, author={}, journal={Environmental science & technology}, year={1995}, volume={29 1}, pages={40A} }