Patent ID: 8496883
Filing Date: 2013-07-30
Classification: B01D,B01J,F01N

Abstract:
1. A honeycomb filter for trapping and removing solid components contained in a fluid, the honeycomb filter comprising: a plurality of porous partition portions each forming a cell, the cell being open at one end and closed at the other end and serving as a flow path of the fluid; and a trapping layer for trapping and removing the solid components contained in the fluid, the trapping layer being disposed on each of the partition portions and containing particle groups having an average particle size smaller than the average pore size of the partition portions, wherein an upstream region of each of the partition portions includes an undeposited region having no trapping layer, the undeposited region having a length of 5% or more and 30% or less of the length of an inlet cell, which is the cell on the inlet side, and wherein the undeposited region in the upstream region of each of the partition portions has an area of 10% or more of the area of the cell in a cross section perpendicular to a flow direction of the fluid.