Catalyst of nickel, cobalt or iron cpds. and refractory oxide - mixed with carrier particles and used for methanisation reactions

摘要

Catalyst precursors as shaped preforms in which each preform is a mixt. of (a) discrete particles of common-ppted. thermally-decomposable cpds. of (A) Ni and/or Co and/or Fe, (B) a trivalen metal with a refractory oxide and opt. (C) a divalent metal with a refractory oxide, and (b) discrete particles of catalyst carrier material. Used in methanism, processes for conversion of CO and/or CO2 with H2 to methane, esp. at outlet temps. over 400 degrees, esp. from 500 degrees C up to 600-900 degrees C, as used for steam generation for electricity prodn., e.g. by an endothermic methane/steam reforming process carried out at one phase where heat is available, and the product gas methanised in an exothermic reaction at another place, with recycling of the gas mixt. The catalysts show improved mechanical stability and retention of activity in use, esp. at high temps.