Exhaust gas catalyst
US9694354B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2013 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Sep 25, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24273
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An object of the present invention is to provide an exhaust gas catalyst that can achieve high purification performance. The exhaust gas catalyst includes: a base material (3) having a plurality of inner wall surfaces (7) formed by a plurality of through holes (5) penetrating therethrough from a first end surface (3a) to a second end surface (3b); and a plurality of catalyst layers (9) formed on the plurality of inner wall surfaces (7), respectively, wherein: each of the through holes (5) has a central axis (5X); each of the catalyst layers (9) is sectioned into a first region (9A) extending from the first end surface (3a) toward the second end surface (3b) by a predetermined distance, a second region (9B) extending from the second end surface (3b) toward the first end surface (3a) by a predetermined distance, and a third region (9C) placed between the first region (9A) and the second region (9B); and the catalyst layer (9) is formed such that a distance (h1) from the central axis (5X) of the through hole (5) to an inner surface (9m) of the catalyst layer (9) in the first region (9A) of the catalyst layer (9) is smaller than a distance (h3) from the central axis (5X) of the through…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.