Patent ID: 8071502
Filing Date: 2011-12-06
Classification: B01D,B01J,Y02T

Abstract:
1. An exhaust gas purifying catalyst comprising: a single substrate having a through hole penetrating the substrate in an axial direction; and a catalyst coating layer formed on an internal surface of the through hole, the catalyst coating layer containing: wherein the through hole forms a passage for exhaust gas, and the single substrate is divided into an upstream portion of the passage and a downstream portion of the passage with respect to a direction of flow of exhaust gas, wherein a weight ratio of the component (a) to the component (b) in the catalyst coating layer is within a range of 1:8.33 to 1:166.7 in an area B located on a downstream portion of the passage; and the weight ratio of the component (a) to the component (b) in the catalyst coating layer is within a range of 1:0.3 to 1:0.7 in the area A located on the upstream portion of the passage and the upstream portion of the passage being free of barium.