Honeycomb filter
AssigneeIbiden Co., Ltd.
InventorsKazutake Ogyu, Toyoki Ogasawara
Life of this patent
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Abstract
A honeycomb filter includes a honeycomb structure and a zeolite. The honeycomb structure has cell walls to define cells between the cell walls. The zeolite is supported on the cell walls. An amount of the zeolite 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 is from about 55% to about 65%. 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. The pore volume A indicates a pore volume of pores having a pore diameter of one half or less of the average pore diameter. The pore volume B indicates a pore volume of pores having a pore diameter of twice or more the average pore diameter.
Claims23
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.
Dependencies are inferred from the claim text.