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KMID : 1059519910350020111
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Journal of the Korean Chemical Society
1991 Volume.35 No. 2 p.111 ~ p.118
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The Kinetics Study of Ozone with Sulfur Dioxide in the Gas Phase
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Kwon Young-Sik
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Abstract
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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.
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KEYWORD
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