用于NH_3选择性催化还原NO的非钒基催化剂研究进展  

Research Progress in Vanadium-Free Catalysts for the Selective Catalytic Reduction of NO with NH_3

作　　者：刘福东[1] 单文坡[1] 石晓燕[1] 张长斌[1] 贺泓[1] 

机构地区：[1]中国科学院生态环境研究中心,北京100085

出　　处：《催化学报》2011年第7期1113-1128,共16页

基　　金：国家高技术研究发展计划(863计划;2009AA064802;2009AA06Z301);国家自然科学基金(50921064);日本高能加速器研究机构;2009G177~~

摘　　要：NH3选择性催化还原NO(NH3-SCR)技术在燃煤电厂烟气脱硝过程中有着多年的工业应用经验,也是最有望实际应用于柴油车尾气NOx催化去除的技术之一.鉴于目前工业化应用的V2O5-WO3(MoO3)/TiO2催化剂体系应用于柴油车尾气净化仍存在着诸多问题,开发新型、高效、稳定且环境友好的非钒基NH3-SCR催化剂体系成为NOx催化净化领域的研究热点.以分子筛催化剂(包括Cu基分子筛催化剂以及Fe基分子筛催化剂)和氧化物催化剂(包括Fe基氧化物催化剂、Mn基氧化物催化剂以及其他非钒基氧化物催化剂)为主线,综述了近年来国内外有关非钒基NH3-SCR催化剂的研究进展,较为全面地总结了该系列催化剂的NH3-SCR反应性能、活性中心结构、低温SCR活性改进、NH3-SCR反应机理、抗H2O或抗SO2性能改善以及工业化应用的可行性,并展望了该领域未来可能的发展方向和研究热点.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.

关 键 词：选择性催化还原 烟气脱硝 柴油车尾气净化 非钒基催化剂 分子筛催化剂 氧化物催化剂 低温活性 反应机理 

分 类 号：O643.36[理学—物理化学]