Preparation of Fischer鈥揟ropsch Supported Cobalt Catalysts Using a New Gas Anti-Solvent Process

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• 作者：Raimon P. Marin ; Simon A. Kondrat ; James R. Gallagher ; Dan I. Enache ; Paul Smith ; Paul Boldrin ; Thomas E. Davies ; Jonathan K. Bartley ; Garry B. Combes ; Peter B. Williams ; Stuart H. Taylor ; John B. Claridge ; Matthew J. Rosseinsky ; Graham J. Hutchings
• 刊名：ACS Catalysis
• 出版年：2013
• 出版时间：April 5, 2013
• 年：2013
• 卷：3
• 期：4
• 页码：764-772
• 全文大小：347K
• 年卷期：v.3,no.4(April 5, 2013)
• ISSN：2155-5435

文摘

Cobalt and ruthenium-promoted cobalt Fischer鈥揟ropsch catalysts supported on titania have been prepared for the first time by gas anti-solvent precipitation. The use of dense CO₂ as an anti-solvent enables the precipitation of cobalt acetate and ruthenium acetylacetonate onto preformed titania. The gas anti-solvent process produces catalysts with the desired 20 wt % cobalt content as precursors, which on calcination give highly dispersed Co₃O₄. The addition of ruthenium to the gas anti-solvent prepared cobalt catalysts has been investigated by two methods (a) coprecipitation with cobalt acetate and (b) wet impregnation onto a precalcined cobalt titania catalyst, and these resulted in catalysts with distinctly different properties. These catalysts were compared with a standard ruthenium-promoted cobalt catalyst prepared by wet impregnation and were found to be substantially more active for the Fischer鈥揟ropsch reaction.

Keywords:

Fischer鈭扵ropsch; cobalt; ruthenium; cobalt acetate; supercritical anti-solvent precipitation