Support effects in cobalt-based fischer-tropsch catalysis

摘要: Abstract A range of cobalt catalysts supported on kieselguhr, silica, alumina, bentonite, zeolite Y, mordenite and ZSM-5 was examined for catalytic activity product selectivity in the Fischer-Tropsch reaction. These results were correlated with catalyst reducibility adsorptive properties, as well support acidity, surface area structure. It found that high supports give dispersions tend to produce highly active catalysts, long is not hindered by metal-support interactions or ion exchange, pore diffusion blocking effects are taking place. All produced similar methane, carbon dioxide higher hydrocarbon selectivities, being low all cases. The nature hydrocarbons depended strongly upon non-zeolitic, acidity producing classic straight chained product. Of most acidic branched product, followed Y catalyst. character from explained inaccessibility primary products acid sites, due channel system exchange thereby preventing secondary reactions such isomerisation occurring.