Patent ID: 9381510
Filing Date: 2016-07-05
CPC Classification: B01D,B01J,Y02T,Y10T

Claim Text:
1. An exhaust gas purifying catalyst comprising a catalyst layer comprising two or more types of inorganic porous particles each having a different particle size, a catalytically active component, and voids, wherein; as a first characteristic, the voids satisfying a condition of the following (formula 1) occupy 50% or more by number of all the voids in the catalyst layer: wherein S represents a void cross-sectional area, and L represents a void cross-sectional circumference in the (formula 1), and; as a second characteristic, in the void cross-sectional area in the catalyst layer, an average void radius, determined assuming that a void shape is a perfect circle, is 10 μm to 20 μm.