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题名: NOx storage-reduction over Pt/Mg-Al-O catalysts with different Mg/Al atomic ratios
作者: Cheng, H;  Chen, GW;  Wang, SD;  Wu, DY;  Zhang, Y;  Li, HQ
关键词: lean-burn ;  NOx ;  storage-reduction ;  platinum ;  hydrotalcite ;  MgO
刊名: KOREAN JOURNAL OF CHEMICAL ENGINEERING
发表日期: 2004-05-01
卷: 21, 期:3, 页:595-600
收录类别: SCI
文章类型: Article
项目归属: 903
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: A series of Pt/Mg-Al-O catalysts with different Mg/Al atomic ratios were prepared. The NOx storage capacities of these catalysts were measured by isothermal storage at 350 degreesC. It was found that the NOx storage capacity increased with increasing Mg/Al atomic ratios. The catalytic behaviors of Pt/Mg-Al-O and Pt/MgO were studied with storage-reduction cycles at 400 degreesC. Under oxidizing conditions, NOx concentration in the outlet gas gradually increased with time, which indicated the catalysts could store NOx effectively. After a switch from oxidizing conditions to reducing conditions, NOx desorption peak emerged immediately due to the incomplete reduction of stored NOx, which lowered the total NOx conversion. With increasing Mg/Al atomic ratio in the catalysts, NOx conversion increases. Pt/MgO has the highest NOx conversion because of its best activity in the reduction of NOx by C3H6. It seems that with an increasing amount of MgO in the catalysts, the self-poisoning of Pt-sites by adsorbed species during the reaction of NOx with C3H6 may be inhibited effectively.
关键词[WOS]: NO(X) STORAGE ;  ADSORPTION ;  EXHAUST ;  ABSORPTION/DESORPTION ;  PEROVSKITES ;  ENGINE ;  OXIDE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000221991200008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/81017
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:
Cheng, H,Chen, GW,Wang, SD,et al. NOx storage-reduction over Pt/Mg-Al-O catalysts with different Mg/Al atomic ratios[J]. KOREAN JOURNAL OF CHEMICAL ENGINEERING,2004,21(3):595-600.
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