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题名: Enhancement of low-temperature activity over Cu-exchanged zeolite beta from organotemplate-free synthesis for the selective catalytic reduction of NO with NH3 in exhaust gas streams
作者: Xu, Li1;  Shi, Chuan1;  Zhang, Zhaoshun1;  Gies, Hermann2;  Xiao, Feng-Shou3;  De Vos, Dirk4;  Yokoi, Toshiyuki5;  Bao, Xinhe6;  Feyen, Mathias7;  Maurer, Stefan7;  Yilmaz, Bilge8;  Mueller, Ulrich7;  Zhang, Weiping1
关键词: Organotemplate-free Beta zeolite ;  Cu-Beta catalyst ;  NH3-SCR ;  H-2-TPR ;  CO-FTIR
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2014-12-01
DOI: 10.1016/j.micromeso.2014.04.034
卷: 200, 页:304-310
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: A series of Cu-exchanged Al-rich Beta zeolites from organotemplate-free synthesis was prepared and investigated for selective catalytic reduction (SCR) of NOx with NH3 in exhaust gas streams. In comparison to conventional Cu-Beta zeolite with Si/Al ratio of 19, Cu-Beta zeolite with Si/Al ratio of 4 is a superior low-temperature NH3-SCR catalyst. Very high NO conversion (>95%) can be achieved at temperatures as low as 150 to similar to 400 degrees C. XRD, UV-Vis-NIR and NH3-TPD measurements show that more isolated Cu2+ ions are present at the exchange sites of Al-rich Beta zeolite. The combination of CO-FTIR and H-2-TPR analysis demonstrates that Cu2+ ions could be reduced more readily on the Al-rich Beta than on the conventional Beta probably due to the proximity of the isolated Cu2+ ions. These can be correlated to the enhancement of NO conversion at lower temperatures over Cu-exchanged Al-rich Beta zeolite. (C) 2014 Elsevier Inc. All rights reserved.
关键词[WOS]: DIESEL-ENGINE ;  AMMONIA ;  SITES ;  SCR ;  CU/SAPO-34 ;  CU-SSZ-13 ;  CU-ZSM-5 ;  ROUTE ;  IONS ;  FTIR
语种: 英语
WOS记录号: WOS:000343630100039
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145874
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.Dalian Univ Technol, State Key Lab Fine Chem, Sch Chem, Dalian 116024, Peoples R China
2.Ruhr Univ Bochum, Inst Geol Mineral & Geophys, Bochum, Germany
3.Zhejiang Univ, Dept Chem, Hangzhou 310028, Zhejiang, Peoples R China
4.Katholieke Univ Leuven, Ctr Surface Chem & Catalysis, Leuven, Belgium
5.Tokyo Inst Technol, Chem Resources Lab, Yokohama, Kanagawa 227, Japan
6.Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
7.BASF SE, D-67056 Ludwigshafen, Germany
8.BASF Corp, Chem Res & Engn, Iselin, NJ 08830 USA

Recommended Citation:
Xu, Li,Shi, Chuan,Zhang, Zhaoshun,et al. Enhancement of low-temperature activity over Cu-exchanged zeolite beta from organotemplate-free synthesis for the selective catalytic reduction of NO with NH3 in exhaust gas streams[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2014,200:304-310.
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