分子筛类催化剂上甲烷选择性催化还原NOx研究进展  

Progress of selective catalytic reduction of NO_x with methane over zeolite-based catalysts

作　　者：荆国华[1,2] 李俊华[1] 杨栋[1] 郝吉明[1] 

机构地区：[1]清华大学环境科学与工程系,北京100084 [2]华侨大学化工学院,福建厦门361021

出　　处：《化工进展》2009年第3期504-510,517,共8页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(20677034);国家863计划(2006AA060301)资助项目

摘　　要：选择性催化还原NOx是处理工业废气和稀燃汽车尾气NOx的有效方法。由于还原剂甲烷廉价易得,甲烷选择性催化还原NOx(简称CH4-SCR)已成为近年来的研究热点,而分子筛类催化剂因催化活性高而得到广泛研究。本文综述了CH4-SCR脱除NOx体系中不同金属负载的分子筛催化剂及反应机理方面的研究进展,包括Co系、Pd系、In系等分子筛催化剂在催化性能、反应机理及掺杂改性等方面的研究现状,并提出了分子筛类催化剂用于CH4-SCR的研究方向。Selective catalytic reduction of NOx is an efficient technique to remove NOx in the presence of excess oxygen for both stationary and mobile sources. Selective catalytic reduction of NO with methane （CH4-SCR） has received considerable attention because methane is low cost and easily obtained. Characterized with high catalytic activity, zeolite-based catalysts have been widely studied. In this paper, the advances in zeolite-based catalysts for CH4-SCR are reviewed, with focus on catalytic activity, reaction mechanism and the promotion effect of the main four types of Co, Pd, In and Ag catalysts supported on zeolite. By comparing the properties of these catalysts, the application and further research direction on zeolite-based catalyst of CHa-SCR are proposed.

关 键 词：甲烷 选择性催化还原 氮氧化物 分子筛 

分 类 号：X701.7[环境科学与工程—环境工程] O643.36[理学—物理化学]