Honeycomb filter and urea scr device
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 includes cell walls having a porosity of about 55% to about 65% and extending along a longitudinal direction of the honeycomb structure to define cells between the cell walls. Each of the cells is sealed at either end of the cells. The zeolite is supported on the cell walls of the honeycomb structure. An amount of the zeolite supported on the cell walls is from about 80 g/L to about 150 g/L. A thermal conductivity of the cell walls supporting the zeolite is about 3 W/mK or more.
Claims38
A honeycomb filter comprising:
- a honeycomb structure comprising:
- silicon carbide;
- and
- cell walls having a porosity of about 55% to about 65% and 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, an amount of the zeolite supported on the cell walls being from about 80 g/L to about 150 g/L, a thermal conductivity of the cell walls supporting the zeolite being about 3 W/mK or more.
A urea SCR device comprising
- a honeycomb filter placed in a casing, the honeycomb filter comprising:
- a honeycomb structure comprising cell walls having a porosity of about 55% to about 65% and 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, an amount of the zeolite supported on the cell walls being from about 80 g/L to about 150 g/L, a thermal conductivity of the cell walls supporting the zeolite being about 3 W/mK or more.
Dependencies are inferred from the claim text.