Patent ID: 8257660

Claim:
A honeycomb filter comprising: a honeycomb structure having cell walls extending along a longitudinal direction of the honeycomb structure to define cells between the cell walls, each of the cells being sealed at either end of the cells; and a zeolite supported on the cell walls of the honeycomb structure, wherein an amount of the zeolite supported on the cell walls is from about 80 g/L to about 150 g/L, the cells include a large volume cell and a small volume cell, a porosity of the cell walls of the honeycomb structure is from about 55% to about 65%, an average pore diameter of the cell walls of the honeycomb structure is from about 15 μm to about 25 μm, and a proportion of a sum of a pore volume A and a pore volume B relative to a total pore volume C is about 20% or less in a pore diameter distribution of the cell walls of the honeycomb structure, the pore volume A indicating a pore volume of pores having a pore diameter of one half or less of the average pore diameter, the pore volume B indicating a pore volume of pores having a pore diameter of twice or more the average pore diameter.