Catalyst for purification of exhaust gas, method for producing the same, and method for purification of exhaust gas using the same
US10112181B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 17, 2016 |
| Grant date | Oct 30, 2018 |
| Priority date | — |
| Expiry date | Feb 17, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2510/068
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A catalyst for purification of exhaust gas, wherein a substrate and a catalyst coat layer which is formed on a surface of the substrate and which comprises catalyst particles, wherein the catalyst coat layer has an average thickness in a range of 25 to 160 μm, and a void fraction in a range of 50 to 80% by volume as measured by a weight-in-water method, 0.5 to 50% by volume of all voids in the catalyst coat layer consist of high-aspect ratio pores which have equivalent circle diameters in a range of 2 to 50 μm in a cross-sectional image of a cross-section of the catalyst coat layer which the cross-section is perpendicular to a flow direction of exhaust gas in the substrate, and which have aspect ratios of 5 or higher, and the high-aspect ratio pores have an average aspect ratio in a range of 10 to 50.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.