高等学校化学学报

高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (S1): 383.

• Chemistry in Surface Science • 上一篇    下一篇

Effect of SO2 on the NO Oxidation over NiO/γAl2O3 Catalyst

LI Ping1, ZHAO Yue1, LU Guan-Zhong1, ZHAO Xiu-Ge2, LU Wen-Zhi2, XIAO Wen-De2   

  1. 1. Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237;
    2. Research Center of Chemical Reaction Engineering, East China University of Science and Technology, Shanghai 200237
  • 出版日期:2000-12-31 发布日期:2000-12-31

Effect of SO2 on the NO Oxidation over NiO/γAl2O3 Catalyst

LI Ping1, ZHAO Yue1, LU Guan-Zhong1, ZHAO Xiu-Ge2, LU Wen-Zhi2, XIAO Wen-De2   

  1. 1. Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237;
    2. Research Center of Chemical Reaction Engineering, East China University of Science and Technology, Shanghai 200237
  • Online:2000-12-31 Published:2000-12-31

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摘要：

NO is the dominant component of NOx. It can be easily oxidized to NO2 over active catalysts in the oxidizing exhaust gases. And then, the high reactive NO2 can be removed completely further through adsorption or absorption approach. However, SO2,another main contaminant in the exhaust, is well known to poison the oxidative catalysts. A strong deactivation for metal oxides supported on Al2O3 was found when catalysts had been exposed to the gas containing 500ppm SO2. It was also reported that the inhibition effect of SO2 was enhanced at low temperatures. But recently, some studies declare that the oxidation of propane can be promoted over Pt/γ-Al2O3 if a small amount of SO2 (20 ppm) is present in the feed gas[1]. Jang et al. have also found that SO2 has a promoting effect for the oxidation of NO to NO2 over CO3O4/γ-Al2O3 catalyst[2]. These observations are meaningful because the existence of SO2 in the oxidizing exhaust is often inevitable and the problem of catalyst deactivation by SO2 has puzzled researchers for a long time.

Abstract:

NO is the dominant component of NOx. It can be easily oxidized to NO2 over active catalysts in the oxidizing exhaust gases. And then, the high reactive NO2 can be removed completely further through adsorption or absorption approach. However, SO2,another main contaminant in the exhaust, is well known to poison the oxidative catalysts. A strong deactivation for metal oxides supported on Al2O3 was found when catalysts had been exposed to the gas containing 500ppm SO2. It was also reported that the inhibition effect of SO2 was enhanced at low temperatures. But recently, some studies declare that the oxidation of propane can be promoted over Pt/γ-Al2O3 if a small amount of SO2 (20 ppm) is present in the feed gas[1]. Jang et al. have also found that SO2 has a promoting effect for the oxidation of NO to NO2 over CO3O4/γ-Al2O3 catalyst[2]. These observations are meaningful because the existence of SO2 in the oxidizing exhaust is often inevitable and the problem of catalyst deactivation by SO2 has puzzled researchers for a long time.

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