Patent ID: 11883797
Assignee: CATALER CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC B  F | IPC B  F

Claim 10:
11. The exhaust gas purification catalytic device according to claim 1, wherein
the ratio (MBa/MRh) of the mass (MBa) of barium in the first catalytic coating layer to the mass (MRh) of rhodium in the second catalytic coating layer is 6.0 or greater and 58.0 or less,
the first catalytic coating layer has a ratio (PdFr/PdRr) of an amount of palladium (PdFr) contained in a range up to 20% of the total length of the substrate from an exhaust gas flow upstream end portion to an amount of palladium (PdRr) in a range up to 20% of the total length of the substrate from an exhaust gas flow downstream end portion of greater than 1.0 and 3.0 or less, and
the second catalytic coating layer has a ratio (RhFr/RhRr) of an amount of rhodium (RhFr) contained in a range up to 20% of the total length of the substrate from an exhaust gas flow upstream end portion to an amount of rhodium (RhRr) contained in a range up to 20% of the total length of the substrate from an exhaust gas flow downstream end portion of 0.90 or greater and 1.10 or less.