Promotion effect of Ce and Ta co-doping on the NH_(3)-SCR performance over V_(2)O_(5)/TiO_(2)catalyst  

作　　者：Long Liu Xin Shen Zhihua Lian Chunxi Lin Ying Zhu Wenpo Shan Hong He 

机构地区：[1]Collaborative Innovation Center of Chemistry for Energy Materials,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China [2]Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China [3]State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [4]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Environmental Sciences》2025年第4期332-339,共8页环境科学学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.22276182 and 22188102);the Natural Science Foundation of Fujian Province,China(No.2023J06048);the Youth Innovation Promotion Association of Chinese Academy of Sciences(No.2021303).

摘　　要：NH_(3)-SCR(SCR:Selective catalytic reduction)is an effective technology for the de-NO_(x)process from both mobile and stationary pollution sources,and the most commonly used catalysts are the vanadia-based catalysts.An innovative V_(2)O_(5)-CeO_(2)/TaTiO_(x)catalyst for NO_(x)removal was prepared in this study.The influences of Ce and Ta in the V_(2)O_(5)-CeO_(2)/TaTiO_(x)catalyst on the SCR performance and physicochemical properties were investigated.The V_(2)O_(5)-CeO_(2)/TaTiO_(x)catalyst not only exhibited excellent SCR activity in a wide temperature window,but also presented strong resistance to H_(2)Oand SO_(2)at 275◦C.A series of characterizationmethods was used to study the catalysts,including H2-temperature programmed reduction,X-ray photoelectron spectroscopy,NH_(3)-temperature programmed desorption,etc.It was discovered that a synergistic effect existed between Ce and Ta species.The introduction of Ce and Ta enlarged the specific surface area,increased the amount of acid sites and the ratio of Ce^(3+),(V^(3+)+V^(4+))and Oα,and strengthened the redox capability which were related to synergistic effect between Ce and Ta species,significantly improving the NH_(3)-SCR activity.

关 键 词：NH_(3)-SCR Vanadia-based catalysts Synergistic effect CO-DOPING Low temperature 

分 类 号：X701[环境科学与工程—环境工程] TQ426[化学工程]