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题名: Preparation of K-Co-Mo-C catalyst and its catalytic performance for mixed alcohol synthesis
作者: Li, CL;  He, YL;  Liu, ZM
关键词: potassium ;  cobalt ;  molybdenum ;  carbon ;  syngas ;  mixed alcohol
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2006-05-01
卷: 27, 期:5, 页:409-415
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: A K-Co-Mo-C catalyst with remnant carbon was prepared by the sol-gel method. The carbon content was adjusted by adding different amounts of carbon precursor. Catalytic behavior of mixed alcohols synthesis from syngas was investigated over the catalysts. By combining different characterization techniques, such as X-ray diffraction, thermo-gravimetric analysis, N-2 adsorption isotherms method, and temperature-programmed desorption of hydrogen, it was revealed that the presence of appropriate content of remnant carbon increased the dispersion of active phase and improved the yield and selectivity for alcohol. For the catalysts with superfluous remnant carbon, the selectivity for alcohol decreased and the selectivity for hydrocarbon increased, which might be due to the fact that with the increase of amount of carbon precursors, Mo species was readily reduced to the metallic state. For the sample calcined in air, the metal oxide precursors were easily aggregated to irreducible compound, so the activity for alcohol synthesis was low. The sample with 2.8% carbon had the largest surface area and pore volume, and showed the highest activity for alcohol synthesis. Calcining sample at higher temperature in inert atmosphere also caused the activity for alcohol synthesis to decrease obviously, but the selectivity for C-2 divided by alcohols increased markedly.
关键词[WOS]: MOLYBDENUM ;  CO-H2
语种: 英语
WOS记录号: WOS:000238200000010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140340
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, Lab Nat Gas Utilizat & Appl Catalysis, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Li, CL,He, YL,Liu, ZM. Preparation of K-Co-Mo-C catalyst and its catalytic performance for mixed alcohol synthesis[J]. CHINESE JOURNAL OF CATALYSIS,2006,27(5):409-415.
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