Kinetics of the reaction O(3P) + SO2 + M → SO3 + M over the temperature range of 299°–440°K

Abstract

AbstractRate constants for the reaction O(3P) + SO2 + M have been determined over the temperature range of 299°–440°K, using a flash photolysis–NO2 chemiluminescence technique. For MAr, the Arrhenius expression was obtained. At room temperature k2Ar = (1.05 ± 0.21) × 10−33 cm6/molec2·sec. In addition, the rate constants k2 = (1.37 + 0.27) × 10−33 cm6/molec2·sec, k2 = (9.5 ± 3.0) ± 10−33 cm6/molec2·sec, k3 = (1.1 ± 0.2) ± 10−31 cm6/molec2·sec, and k3 = (2.6 − 0.9) ± 10−31 cm6/molec2·sec were obtained at room temperature where k3M is the rate constant for the reaction O + NO + M → NO2 + M. The rate data are compared and discussed with literature values.