2011 Spring Meeting & 7th Global Congress on Process Safety

(106b) Influence of Preparation Methods on Catalytic Activity of Bi-Modal Mesoporous Cobalt-Based Catalysts for Fischer-Tropsch Synthesis

Authors

Jungang Wang - Presenter, Institute of Coal Chemistry, The Chinese Academy of Science
Debao Li - Presenter, Institute of Coal Chemistry, Chinese Academy of Sciences
Bo Hou - Presenter, Institute of Coal Chemistry, Chinese Academy of Sciences
Litao Jia - Presenter, Institute of Coal Chemistry, The Chinese Academy of Science
Yuhan Sun - Presenter, Institute of Coal Chemistry, Chinese Academy of Sciences; Shanghai Advanced Research Institute, Chinese Academy of Sciences,


A series of bimodal mesoporous cobalt-based catalysts for Fischer-Tropsch synthesis were prepared using three kinds of methods: incipient-wetness impregnation (IWI), excessive impregnation (EI) and vapor-induced internal hydrolysis (VIH). The catalysts were characterized by N2 physisorption, XRD, HRTEM, H2-TPR and Raman spectroscopy. The N2 physisorption results showed the catalysts prepared by IWI and VIH well retained the double mesoporous character, and the cobalt particles were mainly located in the pore proved by HRTEM. The FTS results showed the reducibility and dispersibility of catalysts prepared by IWI and EI were very high. Especially the catalyst prepared by IWI method with smallest Co3O4 crystallite size and highest dispersibility showed the higher FTS activity, lower methane selectivity and higher C5+ selectivity.

Key words: bi-modal; preparation method; cobalt-based catalyst; Fischer-Tropsch synthesis