Patent ID: 7951338
Filing Date: 2011-05-31
Classification: B01D,B01J,F01N,Y10T

Abstract:
1. A catalytic converter comprising: a porous honeycomb structural body having partition walls which divide and form a plurality of cells functioning as fluid passages, each of the fluid passages communicating from one end face to another end face of the associated cell; and a catalyst coating layer coated on the partition walls, wherein 10% or more of the plurality of the cells are plugged by plug portions which are each formed at one end or a middle of an associated passage, an average maximum distance of image of the honeycomb structural body is 10 μm or more and a porosity of the honeycomb structural body is 40% or more, the catalyst coating layer contains at least one oxide selected from a group consisting of alumina, ceria, titania, silica and zirconia, and also a catalyst containing at least one precious metal selected from a group consisting of platinum, rhodium and palladium, or metal exchanged zeolite or vanadium is supported in the catalyst coating layer as the catalytic active constituent, and an average maximum distance of image of the catalyst coating layer is 10 μm or more, and a porosity of the catalyst coating layer is 40% or more.