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
文献类型：期刊论文
| 作者 | Zhao, Zhenchao6; Yu, Rui6; Zhao, Rongrong6; Shi, Chuan6; Gies, Hermann7; Xiao, Feng-Shou8; De Vos, Dirk9; Yokoi, Toshiyuki1; Bao, Xinhe2; Kolb, Ute3 |
| 刊名 | APPLIED CATALYSIS B-ENVIRONMENTAL
 |
| 出版日期 | 2017-11-15 |
| 卷号 | 217页码:421-428 |
| 关键词 | Nh3-scr Cu-ssz-13 Catalyst Organotemplate-free Synthesis Of Ssz-13 Na++ Effect Hydrothermal Stability |
| DOI | 10.1016/j.apcatb.2017.06.013 |
| 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. |
| 语种 | 英语 |
| WOS记录号 | WOS:000405158000042 |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/152061]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Tokyo Inst Technol, Chem Resources Lab, Yokohama, Kanagawa, Japan 2.Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 3.Johannes Gutenberg Univ Mainz, Inst Phys Chem, D-55128 Mainz, Germany 4.BASF SE, Proc Res & Chem Engn, D-67056 Ludwigshafen, Germany 5.BASF Corp, Catalysts LLC, Iselin, NJ 08830 USA 6.Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China 7.Ruhr Univ Bochum, Inst Geol Mineral & Geophys, Bochum, Germany 8.Zhejiang Univ, Dept Chem, Hangzhou 310028, Peoples R China 9.Katholieke Univ Leuven, Ctr Surface Chem & Catalysis, Leuven, Belgium |
| 推荐引用方式 GB/T 7714 | 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. |
| APA | Zhao, Zhenchao.,Yu, Rui.,Zhao, Rongrong.,Shi, Chuan.,Gies, Hermann.,...&Zhang, Weiping.(2017).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.APPLIED CATALYSIS B-ENVIRONMENTAL,217,421-428. |
| MLA | Zhao, Zhenchao,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".APPLIED CATALYSIS B-ENVIRONMENTAL 217(2017):421-428. |
入库方式： OAI收割
来源：大连化学物理研究所
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