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题名: Influence of Ethanol Impregnation on Properties of Co/SBA-15 Fischer-Tropsch Catalysts
作者: Duan Hongmin1, 2;  Ge Qingjie1;  Zhang Wei1, 2;  Xu Hengyong1
关键词: ethanol impregnation ;  cobalt-based catalyst ;  SBA-15 molecular sieve ;  Fischer-Tropsch synthesis ;  pore structure
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2009-09-01
卷: 30, 期:9, 页:901-906
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: SBA-15-supported cobalt (5%) catalysts were prepared by incipient wetness impregnation with aqueous and ethanol solution of cobalt nitrate. The Co/SBA-15 catalysts were characterized by N(2) physisorption, X-ray diffraction, and temperature-programmed reduction. The catalytic performance of the catalysts for Fischer-Tropsch (F-T) synthesis was evaluated in a fixed-bed reactor. Lower surface tension of ethanol is helpful to retain cobalt species in mesopores of the SBA-15 support during the drying process. As a result, the surface area and pore volume decrease, and the average pore diameter increases more remarkably for the catalyst prepared with ethanol solution of cobalt nitrate. Compared with the catalyst prepared with aqueous solution of cobalt nitrate, the catalyst prepared with ethanol solution of cobalt nitrate has smaller particle size Of Co(3)O(4) and higher dispersion of cobalt metal. The smaller Co(3)O(4) particles in the catalyst prepared with ethanol solution of cobalt nitrate interact strongly with the SBA-15 support and are reduced at higher temperature. The catalyst prepared with ethanol solution of cobalt nitrate exhibits higher initial activity and higher selectivity for C(5+) hydrocarbon in F-T synthesis. However, the activity of the catalyst decreases more rapidly during the F-T synthesis reaction than the catalyst prepared with aqueous solution of cobalt nitrate.
关键词[WOS]: SUPPORTED COBALT CATALYSTS ;  PROGRAMMED REDUCTION ;  MESOPOROUS STRUCTURE ;  SBA-15 ;  ALUMINA ;  SILICA ;  HYDROCARBONS ;  TPR
语种: 英语
WOS记录号: WOS:000271079600010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141289
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, Liaoning, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Duan Hongmin,Ge Qingjie,Zhang Wei,et al. Influence of Ethanol Impregnation on Properties of Co/SBA-15 Fischer-Tropsch Catalysts[J]. CHINESE JOURNAL OF CATALYSIS,2009,30(9):901-906.
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