Thermally stable monolith catalysts for methane reforming and preparing method of the same

A method of manufacturing a monolith catalyst for reforming methane, the method comprising:

• a) dipping a monolith support in a precursor solution of at least one element, wherein the at least one element is selected from elements belonging to Group 13 Group 15, or Group 16, and the at least one element belongs to Period 3 or higher;
• b) drying the monolith support obtained in step a);
• c) firing the monolith support dried in step b) to form a sintering inhibition layer on a surface of the monolith support;
• d) preparing a metal precursor solution including a compound of Chemical Formula 1 below;
• e) supporting the metal precursor solution of step d) on the monolith support coated with the sintering inhibition layer obtained in step c);
• f) drying the monolith support having the compound of Chemical Formula 1 supported thereon obtained in step e);
• and
• g) firing the monolith support dried in step f) to form a catalytically active layer on a surface of the monolith support obtained in step c), wherein the catalytically active layer includes a compound of Chemical Formula 1
• a(X)−b(Y) [Chemical Formula 1]
• wherein,
• X is a catalytically active component comprising Co and any one or a mixture of two or more selected from the group consisting of Ni, Ru, and Rh, Y is a promoter Zr, and a and b are weight proportions of X and Y, respectively, a being 1, and b ranging from 0.2 to 1.5,
• the precursor solution in step a) does not contain an alumina sol,
• the catalytically active layer is sequentially formed on the sintering inhibiting layer, and
• content of the active metal layer has 0.5 to 2 parts by weight based on 100 parts by weight of the monolith support before dipping in step a).