Exhaust gas purifying catalyst
US10814311B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2017 |
| Grant date | Oct 27, 2020 |
| Priority date | — |
| Expiry date | Sep 19, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An exhaust gas purifying catalyst includes a catalyst layer formed inside a partition wall of a base material having a wall flow structure, and has an upstream-side and a downstream-side catalyst layer. The upstream-side catalyst layer includes Rh and a Ce-containing oxide, and the downstream-side catalyst layer includes Pd and a Ce-containing oxide. The mass of the catalyst layer per unit volume of the base material is from 105 g/L to 210 g/L, the mass of the upstream-side catalyst layer per unit volume in an upstream-side portion is from 50 g/L to 100 g/L, the mass of the downstream-side catalyst layer per unit volume in a downstream-side portion is from 100 g/L to 150 g/L, the Ce amount per unit volume of the base material is from 14 g/L to 35 g/L, and the Ce amount per unit volume in the upstream-side portion is from 5 g/L to 20 g/L.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.