燃料化学学报2012，Vol.40Issue(11)：1336-1340,5.
助剂对Co/Al2O3催化剂浆态床费托合成反应性能影响
Effect of promoters on the performance of Co/Al2O3 catalysts for Fischer-Tropsch synthesis in slurry reactors
摘要
Abstract
The effect of ZrO2, Ru and/or Pt promoters on the structure and performance of Co/Al2O3 catalysts for Fischer-Tropsch synthesis in a slurry reactor was investigated. The results indicated that ZrO2 modification may prevent or reduce the formation of CoAl2O4 phase on the catalysts and improve the reduction of cobalt species, which is beneficial to the increase of the catalytic activity, the decrease of methane selectivity, as well as the improvement of C5+ selectivity. Small amounts of ruthenium and platinum as promoter are able to lower the reduction temperatures of cobalt species (Co3O4→CoO and CoO→Co°) and to get a high reduction extent; as a result, the catalysts promoted with noble metals exhibit much higher activity in CO hydrogenation. Moreover, the impregnation sequence of various components also has an important influence on the performance of resultant catalysts in Fischer-Tropsch synthesis. Impregnation of γ-Al2O3 with Zr at first, the formation of irreducible cobalt aluminate can be prevented; co-impregnation of γ-A12O3 with Co and Ru can enhance the interaction between cobalt and ruthenium, which benefits to the reduction of cobalt oxides; sequential impregnation of γ-Al2O3 with Co and Pt is beneficial to the dispersion of cobalt species. As a result, the sequentially impregnated catalyst Co-Pt-ZrO2/Al2O3 performs excellently in the Fischer-Tropsch synthesis.关键词
Co/γ-Al2O3催化剂/锆助剂/钌助剂/铂助剂/费托合成/浸渍次序Key words
Co/Al2O3 catalysts/ zirconia promoter/ ruthenium promoter/ platinum promoter/ Fischer-Tropsch synthesis/ component impregnation sequence分类
化学化工引用本文复制引用
孙燕,孙启文,蒋凡凯,张宗森,刘继森..助剂对Co/Al2O3催化剂浆态床费托合成反应性能影响[J].燃料化学学报,2012,40(11):1336-1340,5.基金项目
国家重点基础研究发展规划(973计划,2010CB736203). （973计划,2010CB736203）
