CATALYST SUPPORT AND MANUFACTURING METHOD THEREFOR

摘要

A catalyst supporting body 1 has a porous honeycomb base body 2 having a porosity within a range of 40 to 60 vol.%. The body 2 has a plurality of cells 22 partitioned by cell walls 21 arranged in a lattice-like shape. A coated catalyst layer 3 made of a porous body having a void fraction of void spaces within a range of 50 to 63 vol.% is particularly supported on surfaces of the cell walls 21 and in pores 216 formed in the cell walls 21 by a filling rate of not less than 40 vol.%. In an immersing step of a manufacturing method, a combination of a kind of catalyst slurry and the porous honeycomb base body is selected so that a cumulative-frequency at an intersection point between a pore distribution map and a particle size distribution map becomes not less than 80 %. The pore distribution map indicates a relationship between pore sizes of pores in the porous honeycomb base body and a cumulative-frequency of the pores. The particle size distribution map indicates a relationship between particle size in the catalyst slurry and a cumulative-frequency of the particles.