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Investigation of low-temperature hydrothermal stability of Cu-SAPO-34 for selective catalytic reduction of NOx with NH3

文献类型：期刊论文

作者Xiang, Xiao1,2; Wu, Pengfei1,2; Cao, Yi1; Cao, Lei1; Wang, Quanyi1; Xu, Shutao1; Tian, Peng1; Liu, Zhongmin1
刊名CHINESE JOURNAL OF CATALYSIS
出版日期2017-05-01
卷号38页码:918-927
关键词Cu-sapo-34 Low Temperature Hydrothermal Stability Nitrogen Oxides Selective Catalytic Reduction Ammonia Oxidation
DOI10.1016/S1872-2067(17)62836-5
英文摘要The low-temperature hydrothermal stabilities of Cu-SAPO-34 samples with various Si contents and Cu loadings were systematically investigated. The NH3 oxidation activities and NH3-selective catalytic reduction (SCR) activities (mainly the low-temperature activities) of all the Cu-SAPO-34 catalysts declined after low-temperature steam treatment (LTST). These results show that the texture and acid density of Cu-SAPO-34 can be better preserved by increasing the Cu loading, although the hydrolysis of Si-O-Al bonds is inevitable. The stability of Cu ions and the stability of the SAPO framework were positively correlated at relatively low Cu loadings. However, a high Cu loading (e.g., 3.67 wt%) resulted in a significant decrease in the number of isolated Cu ions. Aggregation of CuO particles also occurred during the LTST, which accounts for the decreasing NH3 oxidation activities of the catalysts. Among the catalysts, Cu-SAPO-34 with a high Si content and medium Cu content (1.37 wt%) showed the lowest decrease in NH3-SCR because its Cu2+ content was well retained and its acid density was well preserved. (C) 2017, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
语种英语
WOS记录号WOS:000402346400017
源URL[http://cas-ir.dicp.ac.cn/handle/321008/152308]  
专题大连化学物理研究所_中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Engn Lab Methanol Olefins, Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Xiang, Xiao,Wu, Pengfei,Cao, Yi,et al. Investigation of low-temperature hydrothermal stability of Cu-SAPO-34 for selective catalytic reduction of NOx with NH3[J]. CHINESE JOURNAL OF CATALYSIS,2017,38:918-927.
APA Xiang, Xiao.,Wu, Pengfei.,Cao, Yi.,Cao, Lei.,Wang, Quanyi.,...&Liu, Zhongmin.(2017).Investigation of low-temperature hydrothermal stability of Cu-SAPO-34 for selective catalytic reduction of NOx with NH3.CHINESE JOURNAL OF CATALYSIS,38,918-927.
MLA Xiang, Xiao,et al."Investigation of low-temperature hydrothermal stability of Cu-SAPO-34 for selective catalytic reduction of NOx with NH3".CHINESE JOURNAL OF CATALYSIS 38(2017):918-927.

入库方式： OAI收割

来源：大连化学物理研究所

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