Exhaust gas purification catalyst apparatus
US12270327B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 17, 2020 |
| Grant date | Apr 8, 2025 |
| Priority date | — |
| Expiry date | Apr 21, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2510/0682
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas purification catalyst apparatus has a honeycomb base material and a catalyst noble metal supported by the honeycomb base material, wherein: the honeycomb base material contains ceria-zirconia composite oxide particles as one of the constituent materials, is of a wall flow type, and includes inlet-side cells and outlet-side cells demarcated by porous partition walls; the catalyst noble metal is supported in inlet-side support regions and outlet-side support regions; each of the inlet-side support regions is formed with a specific length from the exhaust gas flow upstream end; the catalyst noble metal 70% support depth is not greater than 50% of the thickness of the porous partition walls; each of the outlet-side support regions is formed with a specific length from the exhaust gas flow downstream end; and the catalyst noble metal 70% support depth is greater than 50% of the thickness of the porous partition walls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.