The invention discloses a catalyst for
catalytic combustion and a preparation method thereof. The catalyst takes
cordierite honeycomb ceramics as a substrate, wherein a
silicon-
aluminum coating, a
composite coating and an
active ingredient are arranged on the surface of the substrate in sequence; based on the total weight of the catalyst, the catalyst contains 80 to 90 weight percent of the
cordierite honeycomb ceramics, 2 to 9 weight percent of the
silicon-
aluminum coating, 3 to 10 weight percent of the
composite coating, and 0.01 to 1 weight percent of the
active ingredient, wherein the
active ingredient is one or more of Pt, Pd, Rh, Ru and Ir, and preferably Pt or Pd; based on the total weight of the
silicon-
aluminum coating, the silicon-aluminum
coating contains 10 to 50 weight percent of
silicon dioxide and 50 to 90 weight percent of aluminum
oxide; based on the total weight of the
composite coating, the composite
coating comprises 40 to 80 weight percent of
titanium dioxide, 5 to 35 weight percent of
silicon dioxide, 1 to 10 weight percent of aluminum
oxide, and 10 to 40 percent of an auxiliary, wherein the auxiliary is selected from one or more of
cerium oxide,
zirconium oxide or
lanthanum oxide. According to the catalyst for the
catalysis of the
combustion disclosed by the invention, the
coating loading capacity is high; the firmness is high; the poisoning resistance and the activity of the catalyst are high; the preparation method is simple; therefore, the catalyst is suitable for industrial application.