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Investigation of low-temperature hydrothermal stability of Cu-SAPO-34 for selective catalytic reduction of NOx with NH3
Xiang, Xiao1,2; Wu, Pengfei1,2; Cao, Yi1; Cao, Lei1; Wang, Quanyi1; Xu, Shutao1; Tian, Peng1; Liu, Zhongmin1
KeywordCu-sapo-34 Low Temperature Hydrothermal Stability Nitrogen Oxides Selective Catalytic Reduction Ammonia Oxidation
Source PublicationCHINESE JOURNAL OF CATALYSIS
2017-05-01
DOI10.1016/S1872-2067(17)62836-5
Volume38Pages:918-927
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
WOS Research AreaChemistry ; Engineering
WOS KeywordCOPPER SURFACE-AREA ; CU/SAPO-34 CATALYSTS ; NITROUS-OXIDE ; NH3-SCR ; AMMONIA ; SAPO-34 ; SCR ; SO2 ; IMPROVEMENT ; CU-SSZ-13
AbstractThe 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.
Language英语
WOS IDWOS:000402346400017
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/152308
Collection中国科学院大连化学物理研究所
Affiliation1.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
Recommended Citation
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.
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