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题名: The promotion effects of Mn, Li and Fe on the selectivity for the synthesis Of C-2 oxygenates from syngas on rhodium based catalysts
作者: Yin, HM;  Ding, YJ;  Luo, HY;  Chen, WM;  Lin, LW;  Bao, X;  Xu, Y
刊名: NATURAL GAS CONVERSION VII
发表日期: 2004
卷: 147, 页:421-426
收录类别: ISTP ;  SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Organic ;  Chemistry, Physical ;  Energy & Fuels
研究领域[WOS]: Chemistry ;  Energy & Fuels
英文摘要: Rh-based catalysts with the promoters of Mn, Li and Fe were prepared. The activity of the catalyst for C, oxygenates formation enhanced with the addition of additives. The promotion effects of these additives were investigated by means of FT-IR, CO-TPD and TPSR of adsorbed CO with H-2,. IR results suggested that Fe, Mn and Li might be in close contact with Rh, and formed new active sites, which promoted CO activation on Rh surface and favored the formation of C-2 oxygenated intermediates. The results of CO-TPD and TPSR showed that only a part of adsorbed CO on the catalyst could be hydrogenated into CH4. The ratio of CH4 quantity in TPSR to that of desorbed CO in CO-TPD on various catalysts was calculated, and it decreased in the order: Rh/SiO2 >Rh-Mn/SiO7 >Rh-Mn-Li/SiO >Rh-Mn-Li-Fe/SiO2, which implied that non-dissociated CO increased in the reverse order. Which was consistent with the catalytic activity of C, oxygenates formation sequence. The improvement of the space-time yield (STY) and selectivity towards C-2 oxygenates could be explained based on that the increase of the nondissociative CO and the decrease of dissociative CO on the catalyst favored the insertion of CO into CHx.
关键词[WOS]: PRESSURE FT-IR ;  SIO2-SUPPORTED RH ;  CO HYDROGENATION ;  CONVERSION ;  MECHANISM
语种: 英语
WOS记录号: WOS:000224407500071
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139599
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. The promotion effects of Mn, Li and Fe on the selectivity for the synthesis Of C-2 oxygenates from syngas on rhodium based catalysts[J]. NATURAL GAS CONVERSION VII,2004,147:421-426.
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