Ozonolysis Rates of Some Atmospheric Gases

Abstract

Abstract Rate constants were measured for the gas phase reactions of ppm concentrations of ozone in air with acetylene, acetaldehyde and toluene as 8.6 ± 0.9, 3.4 ± 0.5 and 1.2 ± 0.6 × 10-20 cm3 molecule-1 sec.-1, respectively, using the O3/NO chemiluminesence detector. Toluene, xylene, methane and carbon monoxide were also investigated and upper limits for the rate constants were obtained. Combination with data on olefins and oxides of nitrogen gives a quantitative assessment of the various contributions to the removal of atmospheric ozone.