Surface supported cobalt catalysts, process utilizing these catalysts for the preparation of hydrocarbons from synthesis gas and process for the preparation of said catalysts
AssigneeExxon Research & Engineering Co.
InventorsWilliam C. Behrmann, Kym B. Arcuri, Charles H. Mauldin
Life of this patent
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Abstract
A supported particulate cobalt catalyst is formed by dispersing cobalt, alone or with a metal promoter, particularly rhenium, as a thin catalytically active film upon a particulate support, especially a silica or titania support. This catalyst can be used to convert an admixture of carbon monoxide and hydrogen to a distillate fuel constituted principally of an admixture of linear paraffins and olefins, particularly a C.sub.10+ distillate, at high productivity, with low methane selectivity. A process is also disclosed for the preparation of these catalysts.
Claims11
A process useful for the conversion of synthesis gas to liquid hydrocarbons and less than about 10 mole % methane which comprises contacting at reaction conditions a feed comprised of carbon monoxide and hydrogen, in H.sub.2 :CO molar ratio equal to or greater than about 0.5:1 at total pressure equal to or greater than about 80 psig, over a catalyst composition having a productivity of at least 150 hr.sup.-1 at 200.degree. C. and which comprises cobalt dispersed as a catalytically active layer upon the outer surface of an inorganic oxide support of a thickness of less than about 200 microns, with the loading of cobalt at least about 0.04 g/cc in said catalytically active layer, calculated as metallic cobalt per packed bulk volume of catalyst.
A process for the conversion of synthesis gas to C.sub.10+ hydrocarbons which comprises contacting at reaction conditions a feed comprised of an admixture of carbon monoxide and hydrogen, in H.sub.2 :CO molar ratio equal to or greater than about 1.71 at total pressure equal to or greater than about 80 psig, over a catalyst composition which comprises cobalt dispersed as a catalytically active layer upon the outer surface of a silica or titania containing support, said active layer being of a thickness of less than 200 microns, and with sufficient cobalt loading to produce a productivity of at least about 150 hr.sup.-1 at 200.degree. C. and convert to methane less than 10 mole percent of the carbon monoxide converted.
Dependencies are inferred from the claim text.