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题名: Catalytic reduction of NO over in situ synthesized Ir/ZSM-5 monoliths
作者: Wang, AQ;  Liang, DB;  Xu, CH;  Sun, XY;  Zhang, T
关键词: Ir catalysts ;  ZSM-5 ;  monoliths ;  lean-burn deNO(x) ;  NO reduction
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2001-08-01
卷: 32, 期:3, 页:205-212
收录类别: SCI
文章类型: Article
部门归属: 15005
项目归属: 1501
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 Ir-based catalysts was investigated for the reduction of NO under lean-burn conditions over binderless Ir/ZSM-5 monoliths, which were prepared by a vapor phase transport (VPT) technique. The catalytic activity was found to be dependent not only on the Ir content, but also on the ZSM-5 loading of the monolith. With the decreasing of the Ir content or the increasing of the ZSM-5 loading of the monolith, NO conversion increased. When the ZSM-5 loading on the cordierite monolith was raised up to ca. 11% and the metal Ir content was about 5 g/l, the NO conversion reached its maximum value of 73% at 533 K and SV of 20 000 h(-1). Furthermore, both the presence of 10% water vapor in the feed gas and the variation of space velocity of the reaction gases have little effect on the NO conversion. A comparative test between Ir/ZSM-5 and Cu/ZSM-5, as well as the variation of the feed gas compositions, revealed that Ir/ZSM-5 is very active for the reduction of NO by CO under lean conditions, although it is a poor catalyst for the C3H8-SCR process. This unique property of Ir/ZSM-5 makes it superior to the traditional three-way catalyst (TWC) for NO reduction under lean conditions. (C) 2001 Elsevier Science B.V. All rights reserved.
关键词[WOS]: PRECIOUS-METAL CATALYSTS ;  LEAN-BURN CONDITIONS ;  SELECTIVE REDUCTION ;  EXCESS OXYGEN ;  HYDROCARBONS ;  ZEOLITE ;  OXIDE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000169768200007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/84561
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, Dalian 116023, Peoples R China

Recommended Citation:
Wang, AQ,Liang, DB,Xu, CH,et al. Catalytic reduction of NO over in situ synthesized Ir/ZSM-5 monoliths[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2001,32(3):205-212.
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