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题名: On the selectively catalytic reduction of NOx with methane over Ag-ZSM-5 catalysts
作者: 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
发表日期: 2002-03-08
卷: 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
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.
关键词[WOS]: ZEOLITE CATALYSTS ;  NITROGEN-OXIDES ;  NITRIC-OXIDE ;  EXCHANGED ZSM-5 ;  CO-FERRIERITES ;  OXYGEN ;  HYDROCARBONS ;  PROPENE ;  PERFORMANCE ;  CU/ZSM-5
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000174141600001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/84891
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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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

Recommended Citation:
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.
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