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《Chinese Journal of Catalysis》 2007-07
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Effects of Reduction Atmosphere on Structure and Catalytic Activity of Co-ZrO_2 Catalyst for Fischer-Tropsch Synthesis

JIA Litao1,2,FANG Kegong1,CHEN Jiangang1,SUN Yuhan1(1 State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,The Chinese Academy of Sciences,Taiyuan 030001,Shanxi,China;2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China)  
The effects of reduction atmosphere on the structure of the Co-ZrO2 coprecipitation catalyst and its catalytic activity for Fischer-Tropsch synthesis were investigated by means of X-ray diffraction,transmission electron microscopy,scanning electron microscopy,and temperature-programmed reduction.The reduction of the Co-ZrO2 catalyst in CO atmosphere led to an increase in BET surface area but obvious decrease in syngas atmosphere.The cubic metallic cobalt species(2θ=44.4°) was observed for the catalyst reduced in H2.After the reduction of the catalyst in either syngas or CO,both the cubic metallic cobalt and hexagonal metallic cobalt(2θ=41.7° and 47.5°) appeared with the presence of the carbon deposition.No catalytic activity was detected for the catalyst sample reduced in CO owing to the severe carbon deposition.The catalyst samples reduced in either syngas or H2 showed the similar CO conversion though the carbon deposition was observed for the former,and its high CH4 selectivity could be attributed to the presence of carbon deposition.
【Fund】: 国家重点基础研究发展计划(973计划 2005CB221402).
【CateGory Index】: O643.36
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