Chinese Journal of Catalysis ›› 2011, Vol. 32 ›› Issue (7): 1113-1128.DOI: 10.3724/SP.J.1088.2011.10315

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Research Progress in Vanadium-Free Catalysts for the Selective Catalytic Reduction of NO with NH3

LIU Fudong, SHAN Wenpo, SHI Xiaoyan, ZHANG Changbin, HE Hong*   

  1. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
  • Received:2011-03-10 Revised:2011-04-02 Online:2011-07-18 Published:2014-11-28

Abstract: Selective catalytic reduction of NO with NH3 (NH3-SCR) is a well-proven technique for the removal of NOx from stationary sources such as coal-fired power plants, and is also one of the most promising techniques for the NOx elimination from diesel exhaust under oxygen-rich conditions. Due to some inevitable disadvantages of the present V2O5-WO3 (MoO3)/TiO2 catalyst for industrial use, many researchers focus on the development of novel, highly efficient, stable, environmental-friendly and vanadium-free NH3-SCR catalysts. The research progress in the field of vanadium-free NH3-SCR catalysts is reviewed, including zeolite catalysts (such as Fe-zeolite catalysts and Cu-zeolite catalysts) and oxide catalysts (such as Fe-based oxide catalysts, Mn-based oxide catalysts, and other vanadium-free oxide catalysts). Several aspects in this field, including the evaluation of catalytic performance, the structure analysis of active sites, the improvement of low temperature activity, the study of NH3-SCR reaction mechanism, the enhancement of H2O/SO2 durability, and the feasibility analysis for industrial use, have been discussed in detail. The possible developing orientation and research interests in the field of vanadium-free NH3-SCR catalysts are previewed.

Key words: selective catalytic reduction, flue gas denitration, diesel exhaust purification, vanadium-free catalyst, zeolite catalyst, oxide catalyst, low temperature activity, reaction mechanism