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On the selectively catalytic reduction of NOx with methane over Ag-ZSM-5 catalysts
Shi, C; Cheng, MJ; Qu, ZP; Yang, XF; Bao, XH
关键词Ag-zsm-5 Nox Methane Tpr
刊名APPLIED CATALYSIS B-ENVIRONMENTAL
2002-03-08
36期:3页:173-182
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
研究领域[WOS]Chemistry ; Engineering
关键词[WOS]ZEOLITE CATALYSTS ; NITROGEN-OXIDES ; NITRIC-OXIDE ; EXCHANGED ZSM-5 ; CO-FERRIERITES ; OXYGEN ; HYDROCARBONS ; PROPENE ; PERFORMANCE ; CU/ZSM-5
英文摘要The catalytic performance of silver-modified ZSM-5 catalysts in the selectively catalytic reduction (SCR) of NOx with methane was investigated. NO was selectively reduced by CH4 to N-2 in the presence of excess O-2, and the catalytic activity depended on both the activation of CH4 and the adsorption properties of NOx. Silver incorporated in ZSM-5 zeolite activated CH4 at low temperatures and lowered the "light-off" temperature for the CH4-SCR of NOx. Temperature-programmed (TP) spectroscopy studies depicted that surface nitrosyl species directly decomposed to N-2 in the absence of O-2. CH4 could not effectively reduce surface nitrosyl species, but might facilitate the direct decomposition of NO through the removal of surface oxygen. Surface nitrates were formed in NO and O-2 coexisting system and could be effectively reduced by CR4 to nitrogen. The priority of surface nitrates to O-2 in the reaction with CH4 clearly demonstrated that CH4 selectively and preferentially reduced the surface nitrate species to N-2 in the excess of oxygen. (C) 2002 Elsevier Science B.V. All rights reserved.
语种英语
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WOS记录号WOS:000174141600001
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被引频次:42[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/84891
专题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, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Dalian Univ Technol, Lab Plasma Phys Chem, Dalian 116024, Peoples R China
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Shi, C,Cheng, MJ,Qu, ZP,et al. On the selectively catalytic reduction of NOx with methane over Ag-ZSM-5 catalysts[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2002,36(3):173-182.
APA Shi, C,Cheng, MJ,Qu, ZP,Yang, XF,&Bao, XH.(2002).On the selectively catalytic reduction of NOx with methane over Ag-ZSM-5 catalysts.APPLIED CATALYSIS B-ENVIRONMENTAL,36(3),173-182.
MLA Shi, C,et al."On the selectively catalytic reduction of NOx with methane over Ag-ZSM-5 catalysts".APPLIED CATALYSIS B-ENVIRONMENTAL 36.3(2002):173-182.
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