Selective catalytic reduction of NO_(x) with NH_(3):opportunities and challenges of Cu-based small-pore zeolites

查看全文 作　　者：Yulong [1]Shan;Jinpeng [1,3]Du;Yan [2]Zhang;Wenpo [2]Shan;Xiaoyan [1,3]Shi;Yunbo [1,2,3]Yu;Runduo [4]Zhang;Xiangju [5]Meng;Feng-Shou [5]Xiao;Hong [1,2,3]He

机构地区：[1]State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;[2]Center for Excellence in Regional Atmospheric Environment,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China;[3]College of Resources and Environment,University of Chinese Academy of Sciences,Beijing 100049,China;[4]State Key Laboratory of Chemical Resource Engineering,Beijing Key Laboratory of Energy Environmental Catalysis,Beijing University of Chemical Technology,Beijing 100029,China;[5]Key Laboratory of Applied Chemistry of Zhejiang Province,Department of Chemistry,Zhejiang University,Hangzhou 310007,China

出　　处：《National Science Review》索引2021年第8卷第10期,共20页

基　　金：supported by the National Natural Science Foundation of China(21637005,21906172,51822811 and 51978640)。 摘　　要：Zeolites,as efficient and stable catalysts,are widely used in the environmental catalysis field.Typically,Cu-SSZ-13 with small-pore structure shows excellent catalytic activity for selective catalytic reduction of NO_(x) with ammonia(NH_(3)-SCR)as well as high hydrothermal stability.This review summarizes major advances in Cu-SSZ-13 applied to the NH_(3)-SCR reaction,including the state of copper species,standard and fast SCR reaction mechanism,hydrothermal deactivation mechanism,poisoning resistance and synthetic methodology.The review gives a valuable summary of new insights into the matching between SCR catalyst design principles and the characteristics of Cu^(2+)-exchanged zeolitic catalysts,highlighting the significant opportunity presented by zeolite-based catalysts.Principles for designing zeolites with excellent NH_(3)-SCR performance and hydrothermal stability are proposed.On the basis of these principles,more hydrothermally stable Cu-AEI and Cu-LTA zeolites are elaborated as well as other alternative zeolites applied to NH_(3)-SCR.Finally,we call attention to the challenges facing Cu-based small-pore zeolites that still need to be addressed. 关键词：environmental catalysis Cu-SSZ-13 NH_(3)-SCR reaction mechanism small-pore zeolites

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Selective catalytic reduction of NO_(x) with NH_(3):opportunities and challenges of Cu-based small-pore zeolites

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