Patent ID: 11918986
Assignee: CATALER CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  F  Y | IPC B  F

Claim 7:
8. An exhaust gas purification device comprising:
a substrate including:
an upstream end through which an exhaust gas is introduced into the device;
a downstream end through which the exhaust gas is discharged from the device; and
a porous partition wall defining a plurality of cells extending between the upstream end and the downstream end;

a first catalyst layer; and
a second catalyst layer,
wherein the first catalyst layer is disposed on a surface of the partition wall in an upstream region including the upstream end of the substrate,
wherein the second catalyst layer is disposed inside the partition wall in a downstream region including the downstream end of the substrate,
wherein the first catalyst layer contains an alumina-zirconia composite oxide and a first metal catalyst supported on the alumina-zirconia composite oxide, wherein the alumina-zirconia composite oxide consists of alumina and zirconia, and
wherein the second catalyst layer contains a second metal catalyst.