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MECHANISMS OF PHOTOCHEMICAL REACTIONS IN URBAN AIR
Citation:
Pitts, Jr., J., K. Darnall, W. Carter, A. Winer, AND R. Atkinson. MECHANISMS OF PHOTOCHEMICAL REACTIONS IN URBAN AIR. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/3-79/110 (NTIS PB80132384), 1979.
Description:
Results of an environmental chamber study and three basic studies pertaining to the chemistry of air pollution are described. Results obtained during the last four years of a long-term program designed to provide data required for the validation of models for chemical transformations in air pollution are presented. A 5800-liter, Teflon-coated, evacuable, thermostatted chamber and a 25 KW xenon arc solar simulator were used for irradiations, under simulated atmospheric conditions, of various hydrocarbon-NOx-air mixtures. Results from a total of 114 irradiations, employing representative alkanes, olefins, aromatics, and oxygenates, both singly and in two or multi-hydrocarbon mixtures, are reported. The experimental procedures and analytical methods employed in this study and the limitations and uncertainties in the data are discussed. The kinetics and mechanism of the gas phase reaction of hydroxyl radicals with o-cresol and methoxy benzene were studied. The reactions of O3 with acetylene, methylglyoxal and a series of aromatic hydrocarbons were also studied.