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题名: Cu-exchanged Al-rich SSZ-13 zeolite from organotemplate-free synthesis as NH3-SCR catalyst: Effects of Na+ ions on the activity and hydrothermal stability
作者: Zhao, Zhenchao1;  Yu, Rui1;  Zhao, Rongrong1;  Shi, Chuan1;  Gies, Hermann2;  Xiao, Feng-Shou3;  De Vos, Dirk4;  Yokoi, Toshiyuki5;  Bao, Xinhe6;  Kolb, Ute7;  Feyen, Mathias9;  McGuire, Robert9;  Maurer, Stefan9;  Moini, Ahmad8;  Mueller, Ulrich9;  Zhang, Weiping1
关键词: NH3-SCR ;  Cu-SSZ-13 catalyst ;  Organotemplate-free synthesis of SSZ-13 ;  Na+ effect ;  Hydrothermal stability
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2017-11-15
DOI: 10.1016/j.apcatb.2017.06.013
卷: 217, 页:421-428
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 relatively low activity at lower temperatures and high cost of SSZ-13 zeolite from organotemplate synthesis are two of major problems of presently commercialized Cu-SSZ-13 catalysts for NH3-SCR reaction. Cu-exchanged Al-rich SSZ-13 catalysts with Si/Al=4 from organotemplate-free synthesis have been prepared, and show superior NH3-SCR performance with NO conversions above 85% at wide-temperature window ranging from 150 to 650 degrees C. Cu-Na-SSZ-13 catalysts with varied amount of residual Na+ were prepared by partial ion-exchange of as-prepared Al-rich Na-SSZ-13, and it's found that Cu-Na-SSZ-13 catalyst with moderate Na+ content can improve both the low-temperature activity and its hydrothermal stability. Al-27 and H-1 MAS NMR spectra indicate that residual Na+ can stabilize the framework Al in Al-rich SSZ-13 zeolite. UV-Vis-NIR and H-2-TPR spectra demonstrate that Na+ co-cations enhance the reducibility of Cu2+, whereas too much amount of Na+ may result in the formation of CuOx, during the hydrothermal treatment, and further decrease the hydrothermal stability of Cu-Na-SSZ-13 catalyst. The optimized organotemplate-free Cu-Na-SSZ-13 with 2.7 wt% Cu and 1.7 wt% Na exhibits almost the same NO conversions as the commercial high-silica Cu-SSZ-13 catalyst at 150-550 degrees C after 750 and 800 degrees C hydrothermal aging, and shows promising practical applications. (C) 2017 Elsevier B.V. All rights reserved.
关键词[WOS]: SOLID-STATE NMR ;  CU-SAPO-34 CATALYSTS ;  CU-SSZ-13 CATALYST ;  BETA-ZEOLITE ;  REDUCTION ;  NOX ;  NH3 ;  AMMONIA ;  SITES ;  FE
语种: 英语
WOS记录号: WOS:000405158000042
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152061
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, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China
2.Ruhr Univ Bochum, Inst Geol Mineral & Geophys, Bochum, Germany
3.Zhejiang Univ, Dept Chem, Hangzhou 310028, Peoples R China
4.Katholieke Univ Leuven, Ctr Surface Chem & Catalysis, Leuven, Belgium
5.Tokyo Inst Technol, Chem Resources Lab, Yokohama, Kanagawa, Japan
6.Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
7.Johannes Gutenberg Univ Mainz, Inst Phys Chem, D-55128 Mainz, Germany
8.BASF Corp, Catalysts LLC, Iselin, NJ 08830 USA
9.BASF SE, Proc Res & Chem Engn, D-67056 Ludwigshafen, Germany

Recommended Citation:
Zhao, Zhenchao,Yu, Rui,Zhao, Rongrong,et al. Cu-exchanged Al-rich SSZ-13 zeolite from organotemplate-free synthesis as NH3-SCR catalyst: Effects of Na+ ions on the activity and hydrothermal stability[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2017,217:421-428.
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