CATALYSTS

摘要

A method of forming a catalyst support by heat treatment of gamma -alumina; a supported primary catalyst comprising iron and a modifier element, in particular a rare earth metal or lanthanum, for conversion of a feed stream of carbon monoxide and hydrogen into hydrocarbons to increase the proportion of C2 - C8 hydrocarbons and the proportion of 1-alkenes in the product; and a secondary catalyst comprising an intermediate oxide of tungsten for the production of branched chain alkenes from straight chain alkenes.