METHANIZING CATALYST OF CARBONIC OXIDE, ITS MANUFACTURING METHOD AND METHANIZING METHOD USING METHANIZING CATALYST

摘要

PPROBLEM TO BE SOLVED: To provide a catalyst used for methanizing reaction for reacting carbon dioxide, a mixture of carbon monoxide and carbon dioxide or a mixture based on them with hydrogen to obtain methane, and its manufacturing method. PSOLUTION: A hydrosol of Zr (A), a salt of at least one kind of a stabilizing element (B) selected from Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ca and Mg and a salt of an iron group element (C) are mixed and the resulting mixture is concentrated, dried up and baked to obtain a catalyst precursor. This catalyst precursor is subjected to reduction treatment to obtain the catalyst. At this time, a chemical composition consisting of A: 18-70%, B: 1-20% and C: 25-80% on an atomic% basis is set based on metals in an elemental state. By this method, the catalyst wherein the iron group element of a metal state is supported on a composite oxide of a tetragonal zirconia structure stabilized by taking a part of the iron group element in a crystal structure along with the stabilizing element is obtained. The iron group element is one or two kinds of Ni, Fe and Co, and Ni must occupy 0.6 or above as a whole in an atomic ratio. PCOPYRIGHT: (C)2010,JPO&INPIT