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题名: Influence of iron promoter on catalytic properties of Rh-Mn-Li/SiO2 for CO hydrogenation
作者: Yin, HM;  Ding, YJ;  Luo, HY;  Zhu, HJ;  He, DP;  Xiong, JM;  Lin, LW
关键词: rhodium ;  iron ;  carbon monoxide ;  hydrogenation ;  C-2 oxygenates
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2003-03-31
卷: 243, 期:1, 页:155-164
收录类别: SCI
文章类型: Article
部门归属: 805
项目归属: 805
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: The effect of iron promoter on the catalytic properties of Rh-Mn-Li/SiO2 catalyst in the synthesis Of C-2 oxygenates from syngas was investigated by means of the following techniques: CO hydrogenation reaction, temperature-programmed reduction (TPR), temperature-programmed desorption and reaction of adsorbed CO (CO-TPD and TPSR) and pulse adsorption of CO. The results showed that the addition of iron promoter could improve the activity of the catalysts. Unexpectedly, the yield of C-2 oxygenates increased greatly from 331.6 up to 457.5 g/(kg h) when 0.05% Fe was added into Rh-Mn-Li/SiO2 catalyst, while no change in the selectivity to C-2 oxygenates was observed. However, the activity and selectivity Of C-2 oxygenates were greatly decreased if the Fe amount exceeded 1.0%. The existence of a little iron decreased the reducibility of Rh precursor, while the reduction of Fe component itself became easier. CO uptake decreased with increasing the quantity of Fe addition. This phenomenon was further confirmed by CO-TPD results. The CO-TPD and TPSR results showed that only the strongly adsorbed CO could be hydrogenated, while the weakly adsorbed CO was desorbed. We propose that Fe is highly dispersed and in close contact with Rh and Mn; such arrangements were responsible for the high yield Of C-2 oxygenates. (C) 2002 Elsevier Science B.V. All rights reserved.
关键词[WOS]: SUPPORTED RHODIUM CATALYSTS ;  RH/SIO2 CATALYSTS ;  CARBON-MONOXIDE ;  RH ;  H-2 ;  ACETALDEHYDE ;  DESORPTION ;  MANGANESE ;  RHMN/NAY ;  SYNGAS
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000181997600013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/83351
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, Nat Gas Utilizat & Appl Catalysis Lab, Dalian 116023, Peoples R China

Recommended Citation:
Yin, HM,Ding, YJ,Luo, HY,et al. Influence of iron promoter on catalytic properties of Rh-Mn-Li/SiO2 for CO hydrogenation[J]. APPLIED CATALYSIS A-GENERAL,2003,243(1):155-164.
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