Acta Phys. -Chim. Sin. ›› 2004, Vol. 20 ›› Issue (09): 1078-1082.doi: 10.3866/PKU.WHXB20040904

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Influences on Oxidation of SO2 and SO32- by Gas Discharge

Ren Jia-Rong;Liu Ji-Xin;Li Rui-Nian;Zhao Bi-Ying;Xie You-Chang   

  1. State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871; Department of Applied Physics, Beijing Institute of Technology, Beijing 100081
  • Received:2004-01-29 Revised:2004-04-16 Published:2004-09-15
  • Contact: Xie You-Chang E-mail:yxie@pku.edu.cn

Abstract: Oxidation effects of SO2 and SO32- by gas discharge were studied. Powers of both DC and DC superimposed AC were used to generate gas discharge. The results show that the gas discharge had no effect on SO2 oxidation in gas phase and enhanced oxidation of SO32- in solution evidently. The enhancement of SO32- in solution is attributed to that gas discharge can generate free radical OH. The free radical can react with SO32- in solution to induce a chain reaction, in which SO32- is oxidized by O2 in air. But the free radical cannot induce a chain reaction in gas phase, which contains SO2. In the meanwhile, gas discharge by power of DC superimposed AC can have a better effect than by power of DC.

Key words: Gas discharge, Oxidation, Non-thermal plasma, DC superimposed AC