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. A porosity of the cell walls is from about 55% to about 65%. A cell density in a cross section perpendicular to the longitudinal direction is from about 46.5 pcs/cm2 to about 62.0 pcs/cm2. A thickness of the cell walls is from about 0.2 mm to about 0.3 mm. The cells include a large volume cell and a small volume cell. An area ratio of a cross sectional area of the large volume cell relative to a cross sectional area of the small volume cell is from about 1.4 to about 2.4.
Claims24
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 each 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,
- a porosity of the cell walls of the honeycomb structure is from about 55% to about 65%,
- a cell density in a cross section perpendicular to the longitudinal direction of the honeycomb structure is from about 46.5 pcs/cm2 to about 62.0 pcs/cm2,
- a thickness of the cell walls of the honeycomb structure is from about 0.2 mm to about 0.3 mm,
- the cells include a large volume cell and a small volume cell, and
- an area ratio of a cross sectional area of the large volume cell perpendicular to the longitudinal direction relative to a cross sectional area of the small volume cell perpendicular to the longitudinal direction is from about 1.4 to about 2.4.
Dependencies are inferred from the claim text.