Exhaust gas purification catalyst and exhaust gas purification method using the same
US11143072B2 · kind B2 · utility
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22References
17Claims
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Key dates
| Filing date | Apr 26, 2018 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Aug 1, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In order to provide an exhaust gas purification catalyst capable of purifying hydrocarbons, carbon monoxide, and nitrogen oxides in exhaust gas at low temperatures, the exhaust gas purification catalyst according to the present invention includes: a region (2) containing palladium on a three-dimensional structure (1), and a first region (3) and a second region (4) provided on the region (2) in order from an inflow side of exhaust gas to an outflow side of exhaust gas. The concentration of neodymium contained in the first region (3) is higher than the concentration of neodymium contained in the second region (4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.