Mechanism of Selective Catalytic Reduction of NO at Low Temperature over V2O5/ACF Catalysts

Chinese Journal of Catalysis ›› 2009, Vol. 30 ›› Issue (10): 1007-1011.

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Mechanism of Selective Catalytic Reduction of NO at Low Temperature over V2O5/ACF Catalysts

HOU Yaqin1,2, HUANG Zhanggen1,*, MA Jianrong3, GUO Shijie1

1State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, Shangxi, China 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3School of Environment and Safety, Taiyuan University of Science and Technology, Taiyuan 030024, Shangxi, China

Received:2009-10-25 Online:2009-10-25 Published:2013-06-06

Abstract

Abstract: A novel V₂O₅/activated carbon fiber (ACF) catalyst for NO removal was prepared. The mechanism of selective catalytic reduction of NO was carried out by a transient response experiment and NH₃ adsorption and oxidation. The results show that NH₃ adsorption is necessary and is a fast process. The active sites can be easily formed in the presence of O₂. Adsorption and temperature-programmed desorption with online mass spectroscopy analysis were used to study the adsorption and oxidation behavior of NH₃ at 120 ^oC over the V₂O₅/ACF catalyst. The adsorbed NH₃ can be oxidized to N₂H₂ on the catalyst surface, and N₂H₂ is an intermediate of oxidized NH₃.

Key words: vanadium oxide, activated carbon fiber, selective catalytic reduction, ammonia, adsorption, activation, mechanism

HOU Yaqin;HUANG Zhanggen;*;MA Jianrong;GUO Shijie. Mechanism of Selective Catalytic Reduction of NO at Low Temperature over V2O5/ACF Catalysts[J]. Chinese Journal of Catalysis, 2009, 30(10): 1007-1011.

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Mechanism of Selective Catalytic Reduction of NO at Low Temperature over V2O5/ACF Catalysts

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