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Support effect of the supported ceria-based catalysts during NH3-SCR reaction
Yao, Xiaojiang1,2,3; Chen, Li3,4; Kong, Tingting1,3; Ding, Shimin1; Luo, Qiong3; Yang, Fumo1,2,3,4
2017-08-01
摘要To investigate how the physicochemical properties and NH3-selective catalytic reduction (NH3-SCR) performance of supported ceria-based catalysts are influenced as a function of support type, a series of CeO2/SiO2, CeO2/gamma-Al2O3, CeO2/Zro(2), and CeO2/TiO2 catalysts were prepared. The physicochemical properties were probed by means of X-ray diffraction, Raman spectroscopy, Brunauer-Emmett-Teller surface, area measurements, X-ray photoelectron spectroscopy, Hz-temperature programmed reduction, and NH3-temperature programmed desorption. Furthermore, the supported ceria-based catalysts' catalytic performance and H2O + SO2 tolerance were evaluated by the NH3-SCR model reaction. The results indicate that out of the supported ceria-based catalysts studied, the CeO2/gamma-Al2O3 catalyst exhibits the highest catalytic activity as a result of having a high relative Ce3+/Ce4+ ratio, optimum reduction behavior, and the largest total acid site concentration. Finally, the CeO2/gamma-Al2O3 catalyst also presents excellent H2O + SO2 tolerance during the NH3-SCR process. (C) 2017, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
关键词Support effect Supported ceria-based catalyst Reduction behavior Surface acidity Ammonia-selective catalytic reduction
DOI10.1016/S1872-2067(17)62868-7
发表期刊CHINESE JOURNAL OF CATALYSIS
ISSN0253-9837
卷号38期号:8页码:1423-1430
通讯作者Yao, XJ ; Yang, FM (reprint author), Yangtze Normal Univ, Collaborat Innovat Ctr Green Dev Wuling Mt Areas, Chongqing 408100, Peoples R China. ; Yao, XJ ; Yang, FM (reprint author), Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Fujian, Peoples R China. ; Yao, XJ ; Yang, FM (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Res Ctr Atmospher Environm, Chongqing 400714, Peoples R China. ; Yang, FM (reprint author), Chongqing Univ, Sch Urban Construct & Environm Engn, Chongqing 400045, Peoples R China.
收录类别SCI
WOS记录号WOS:000408600200015
语种英语