Effect of barium on reducibility and activity for cobalt-based Fischer-Tropsch synthesis catalysts  

作　　者：Agudamu Bao Jinlin Li Yuhua Zhang 

机构地区：[1]Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission Ministry of Education, South-Central University for Nationalities, Wuhan 430074, Hubei, China [2]School of Chemistry and Chemical Engineering, Soochow University, Suzhou 215123, Jiangsu, China

出　　处：《Journal of Natural Gas Chemistry》2010年第6期622-627,共6页天然气化学杂志（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grants No:20590360 and 20773166)

摘　　要：Barium modified Co/Al2O3 catalysts were prepared by incipient wetness impregnation.The catalysts were characterized by XRD,TPD and DRIFTS.The catalytic activity for Fischer-Tropsch synthesis was measured in a continuously stirred tank reactor.It was found that small amounts of BaO（≤2 wt%） improved the cobalt reducibility,which led to more cobalt active sites on the catalyst surface,and then resulted in higher CO conversion and C5＋ selectivity.However,for the catalysts with high BaO loadings negative effects on the catalytic activity and selectivity for high hydrocarbons were observed because of low cobalt reducibility.Barium modified Co/Al2O3 catalysts were prepared by incipient wetness impregnation.The catalysts were characterized by XRD,TPD and DRIFTS.The catalytic activity for Fischer-Tropsch synthesis was measured in a continuously stirred tank reactor.It was found that small amounts of BaO（≤2 wt%） improved the cobalt reducibility,which led to more cobalt active sites on the catalyst surface,and then resulted in higher CO conversion and C5＋ selectivity.However,for the catalysts with high BaO loadings negative effects on the catalytic activity and selectivity for high hydrocarbons were observed because of low cobalt reducibility.

关 键 词：Fischer-Tropsch synthesis BARIUM Co/Al2O3 REDUCIBILITY 

分 类 号：TQ223.121[化学工程—有机化工] TF821[冶金工程—有色金属冶金]