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费托合成催化剂Co-CeO2/SiO2的研究
引用本文:师海波,李强,代小平,余长春,沈师孔.费托合成催化剂Co-CeO2/SiO2的研究[J].石油科学(英文版),2005,2(2).
作者姓名:师海波  李强  代小平  余长春  沈师孔
摘    要:


Co-CeO2/SiO2 Fischer-Tropsch Synthesis Catalyst
Shi Haibo,Li Qiang,Dai Xiaoping,Yu Changchun,Shen Shikong.Co-CeO2/SiO2 Fischer-Tropsch Synthesis Catalyst[J].Petroleum Science,2005,2(2).
Authors:Shi Haibo  Li Qiang  Dai Xiaoping  Yu Changchun  Shen Shikong
Abstract:A series of Co (10.7 wt. %)-CeO2/SiO2 catalysts with various cerium contents was prepared and evaluated. The optimized ceria-promoted catalyst exhibits good activity, high selectivity towards long chain hydrocarbons, and excellent stability. The promotion mechanism of ceria was investigated using X-ray diffraction (XRD), temperature programmed reduction (TPR), H2 temperature programmed surface reaction (H2-TPSR) and transient response technique. It is suggested that the improved catalytic performance of the catalyst modified by ceria be attributed to (1) the improvement in the dispersion of metallic cobalt and the amount of active sites for Fischer-Tropsch Synthesis (FTS), leading to an increased concentration of surface active carbon species and high selectivity towards long chain hydrocarbons; (2) the inhibition of disproportionation of CO and the removal of inactive surface carbon species.
Keywords:Fischer-Tropsch Synthesis  Co/SiO2  ceria  TPR  H2-TPSR  transient response technique
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