Patent ID: 9731278
Date: 2017-08-15
CPC Classifications: B01J,C07C,C10G,C10L,Y02P

Claim:
1. A process for preparing a catalyst for methanation reaction producing methane by hydrogenating carbon dioxide, carbon monoxide or a mixed gas containing at least one of them as the main components, consisting of, based on the metals in the elemental state: A) Zr for providing tetragonal zirconia supporter: 18-70 atomic %, B) one or more of tetragonal zirconia-stabilizing element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ca and Mg (in case of two or more are used, in total): 1-20 atomic %, and C) at least one of the iron group elements being supported on the tetragonal zirconia supporter and acting as the active site: 25-80 atomic %; the process comprising the steps of: mixing aqueous zirconia sol, aqueous solution of the stabilizing element or elements, and aqueous solution of the iron group element or elements in such a ratio that satisfies the conditions set forth in A) to C) above; concentrating the mixture to dry and calcining; and then subjecting to reducing treatment to form the catalyst, in which the stabilizing element or elements and a portion of the iron group element or elements are incorporated in the tetragonal zirconia supporter; and the iron group element or elements not incorporated in the supporter are supported on the supporter in the metallic state.