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题名: CO hydrogenation to light alkenes over Mn/Fe catalysts prepared by coprecipitation and sol-gel methods
作者: Wang, C;  Wang, QX;  Sun, XD;  Xu, LY
通讯作者: 徐龙伢
关键词: CO hydrogenation ;  light alkenes ;  manganese oxide ;  iron catalysts
刊名: CATALYSIS LETTERS
发表日期: 2005-11-01
DOI: 10.1007/s10562-005-8011-3
卷: 105, 期:1-2, 页:93-101
收录类别: SCI
文章类型: Article
部门归属: 8
项目归属: 804
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: CO hydrogenation to light alkenes was carried out on manganese promoted iron catalysts prepared by coprecipitation and sol-gel techniques. Addition of manganese in the range of 1-4 mol.% by means of coprecipitation could improve notably the percentage of C-2 (=) similar to C-4 (=) in the products, but it was not so efficient when the sol-gel method was employed. XRD and H-2-TPR measurements showed that the catalyst samples giving high C-2 (=) similar to C-4 (=) yields possessed ultra. ne particles in the form of pure alpha-(Fe1-xMnx)(2)O-3, and high quality in lowering the reduction temperature of the iron oxide. Furthermore, these samples displayed deep extent of carburization and different surface procedures to the others in the tests of Temperature Programmed Surface Carburization (TPSC). The different surface procedures of these samples were considered to have close relationship with the evolving of surface oxygen. It was also suggested that for the catalysts with high C-2 (=) similar to C-4 (=) yields, the turnover rate of the active site could be kept at a relatively high level due to the improved reducing and carburizing capabilities. Consequently, there would be a large number of sites for CO adsorption/dissociation and an enhanced carburization environment on the catalyst surface, so that the process of hydrogenation could be suppressed relatively to a low level. As a result, the percentage of the light alkenes in the products could be raised.
关键词[WOS]: FISCHER-TROPSCH SYNTHESIS ;  MANGANESE OXIDE CATALYSTS ;  X-RAY-DIFFRACTION ;  CARBON-MONOXIDE ;  IRON CATALYSTS ;  OLEFIN SELECTIVITY ;  REDUCTION ;  BEHAVIOR ;  SYNGAS ;  SPECTROSCOPY
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000232697100015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/93157
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, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Wang, C,Wang, QX,Sun, XD,et al. CO hydrogenation to light alkenes over Mn/Fe catalysts prepared by coprecipitation and sol-gel methods[J]. CATALYSIS LETTERS,2005,105(1-2):93-101.
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