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	Phase transformation in cu-fe-based catalyst during co hydrogenation
	Lin Minggui1,2; Fang Kegong1; Li Debao1; Sun Yuhan1
刊名	Chinese journal of catalysis
	2008-06-01
卷号	29期号:6页码:559-565
关键词	Higher alcohol synthesis Copper-iron catalyst Phase transformation Carbon monoxide Hydrogenation
ISSN号	0253-9837
通讯作者	Lin minggui()
英文摘要	Phase transformation, especially the state of iron, in the cu-fe-based catalyst during co hydrogenation was investigated by x-ray diffraction, mossbauer spectroscopy, x-ray photoelectron spectroscopy, and laser raman spectroscopy. fe2o3 transformed into a mixture of fe3o4 and chi-fe5c2 upon syngas pretreatment at 300 degrees c, and the percentage of chi-fe5c2 went through a maximum during the reaction. the exposure of the reduced catalyst to the reaction conditions clearly influenced its morphology. however, 110 clear carburization of iron was observed on the surface of the reduced catalyst. the obvious discrepancy was due to the unique reduction characteristic of iron, leading to the enrichment of zinc and manganese atoms on the surface. instead, iron atoms were enriched on the surface during the co hydrogenation, which was resulted from the change of oxidation-reduction properties. after reduction, some free carbon deposited on the catalyst surface, and their graphitization took place when the reaction was carried out at 220 degrees c and was enhanced with increasing reaction temperature. this process significantly weakened the synergistic effect between copper and iron and therefore restrained the chain growth ability of the cu-fe-based catalyst.
WOS关键词	FISCHER-TROPSCH SYNTHESIS ; OXIDE CATALYSTS ; IRON-CATALYSTS ; SPECTROSCOPY ; ALCOHOLS ; XPS
WOS研究方向	Chemistry ; Engineering
WOS类目	Chemistry, Applied ; Chemistry, Physical ; Engineering, Chemical
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000257735100012
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2384482
专题	中国科学院大学
通讯作者	Lin Minggui
作者单位	1.Chinese Acad Sci, State Key Lab Coal Convers, Inst Coal Chem, Taiyuan 030001, Peoples R China 2.Chinese Acad Sci, Graduate Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lin Minggui,Fang Kegong,Li Debao,et al. Phase transformation in cu-fe-based catalyst during co hydrogenation[J]. Chinese journal of catalysis,2008,29(6):559-565.
APA	Lin Minggui,Fang Kegong,Li Debao,&Sun Yuhan.(2008).Phase transformation in cu-fe-based catalyst during co hydrogenation.Chinese journal of catalysis,29(6),559-565.
MLA	Lin Minggui,et al."Phase transformation in cu-fe-based catalyst during co hydrogenation".Chinese journal of catalysis 29.6(2008):559-565.

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