Patent ID: 8629074

Claim:
A zeolite honeycomb structure, comprising: a fired article obtained by firing a formed article formed by extruding a zeolite raw material containing zeolite particles, noble metal loaded catalyst carriers containing a noble metal loaded onto catalyst carriers, and an inorganic binding material in a honeycomb shape including partition walls disposed to form a plurality of cells which become through channels of a fluid and extend from one end face to the other end face; wherein an average particle diameter of the noble metal loaded catalyst carriers is ten or more times an average particle diameter of the zeolite particles; wherein the noble metal loaded catalyst carriers are contained in an amount corresponding to a volume ratio which is from 5 to 25 vol % with respect to 100 vol % of the zeolite particles, and the noble metal is loaded onto the noble metal loaded catalyst carriers in an amount corresponding to a mass ratio which is from 0.2 to 2.0 mass % with respect to 100 mass % of the zeolite particles; and wherein when the partition walls consist of 20% of surface portions in a thickness direction of the partition walls as surface portions and 60% of intermediate portions in the thickness direction of the partition walls as intermediate portions, 70 vol % or more of the whole noble metal loaded catalyst carriers is disposed in the intermediate portions of the partition walls.