Simplified model for the prediction of ozone generation in polluted urban areas with continuous precursor species emissions

Abstract

In this paper we study the transient ozone generation process in polluted urban areas, using a simplified set of chemical reactions for the NOx and hydrocarbon photolysis. We obtained a reduced kinetic mechanism and it is solved using the boundary layer theory due to the appearance of two time scales in the problem associated with the photo-chemical reactions of the NO2 and unburned fuel, respectively. Assuming a temporal addition of ozone precursor species, we obtained in closed form, the temporal evolution of the ozone concentration as a function of the physico-chemical parameters. (C) 1999 Elsevier Science Ltd. All rights reserved.