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Catalytic deactivation mechanism research over Cu/SAPO-34 catalysts for NH3-SCR (II): The impact of copper loading
Tang, Jiaojiao1; Xu, Minhong1; Yu, Tie1,2,4; Ma, Hongfei2; Shen, Meiqing1,3; Wang, Jun1,3
关键词Cu/sapo-34 Nh3-scr 950 Degrees c Hydrothermal Treatment Structure Stability
刊名CHEMICAL ENGINEERING SCIENCE
2017-08-31
DOI10.1016/j.ces.2017.04.053
168页:414-422
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Technology
类目[WOS]Engineering, Chemical
研究领域[WOS]Engineering
关键词[WOS]IN-SITU SYNTHESIS ; CU-SAPO-34 CATALYSTS ; MOLECULAR-SIEVE ; HYDROTHERMAL STABILITY ; LOW-TEMPERATURE ; NOX ; REDUCTION ; SAPO-34 ; AMMONIA ; SCR
英文摘要Four Cu/SAPO-34 samples by one-pot method are utilized to examine their durability after 950 degrees C hydrothermal treatment and its relation with copper loading, The SCR results show fresh Cu/SAP0-34 with 3.91% copper loading (F-Cu-3.91) performs the superior NO conversion, wide temperature window and excellent nitrogen selectivity among fresh samples, and NO conversion is mainly determined by isolated Cu2+ contents at low temperature. After 950 degrees C aging treatment, Cu/SAPO-34 catalysts with copper loading under 1.70% present good stability, while the ones with copper loading above 3.91% show activity and crystallinity decline. Ex-situ DRIFTs, XRD and NH3-TPD results reveal the 950 degrees C aging process leads to Si-OH-Al bonds breakage and phase transition of chabazite support over Cu/SAPO-34 samples with high copper loading, meanwhile, the EPR and TPR outcomes prove the copper oxides' further dispersion and coordination variation due to skeleton collapse. Finally, this work is trying to manifest the appropriate copper loading for a stable Cu/SAPO-34 catalyst and its deactivation mechanism during extreme working situation. (C) 2017 Elsevier Ltd. All rights reserved.
语种英语
WOS记录号WOS:000404492300032
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/152128
专题中国科学院大连化学物理研究所
作者单位1.Tianjin Univ, Sch Chem Engn & Technol, State Educ Minist, Key Lab Green Chem Technol, Tianjin 300072, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Zhongshan Rd 457, Dalian 116023, Peoples R China
3.Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
4.Chem Sci & Mat Syst Lab, Gen Motors Global Res & Dev, 3500 Mound Rd, Warren, MI 48090 USA
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Tang, Jiaojiao,Xu, Minhong,Yu, Tie,et al. Catalytic deactivation mechanism research over Cu/SAPO-34 catalysts for NH3-SCR (II): The impact of copper loading[J]. CHEMICAL ENGINEERING SCIENCE,2017,168:414-422.
APA Tang, Jiaojiao,Xu, Minhong,Yu, Tie,Ma, Hongfei,Shen, Meiqing,&Wang, Jun.(2017).Catalytic deactivation mechanism research over Cu/SAPO-34 catalysts for NH3-SCR (II): The impact of copper loading.CHEMICAL ENGINEERING SCIENCE,168,414-422.
MLA Tang, Jiaojiao,et al."Catalytic deactivation mechanism research over Cu/SAPO-34 catalysts for NH3-SCR (II): The impact of copper loading".CHEMICAL ENGINEERING SCIENCE 168(2017):414-422.
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