ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 35, Number 2
JKCSEZ 35(2)
April 20, 1991 

The kinetic of the gas phase reactions of ozone(0.5 torr) with sulfur dioxide was studied. The SO2 reaction was conducted in the 7∼22 torr range at 90∼155℃. The reaction rate was faster than the reaction rate of O3 in the presence of CO2 alone. The reaction of O3 with SO2 follows the rate law: -d(O3)/dt = k0(SO2)(M)(O3) ＋ 2k1(SO2)(O3). The first term of this rate law arises from a third order molecular reaction predominating in the lower temperature range and gave a rate constant k0 = (9.35 ± 8.6) × 109e-(11.05±2.04)kcal/RT(M-2s-1). The second term of the above rate law derived from a second order thermal decomposition reaction which was the major part of the reaction and gave a rate constant k1 = (1.53 ±1.5) × 1011e-22.7 kcal/RT. The overall reaction proceeds with kinetics of complex order composed mainly of second order and third order components.