Exhaust gas purification catalyst and production method thereof
US9550176B2 · kind B2 · utility
13Cited by
1References
4Claims
0Family size
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Key dates
| Filing date | Apr 22, 2014 |
| Grant date | Jan 24, 2017 |
| Priority date | — |
| Expiry date | Apr 22, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This catalyst includes a lower catalytic layer 2 having catalytic ability to oxidize HC and CO and an upper catalytic layer 3 having catalytic ability to reduce NOx. The lower catalytic layer 2 contains Pt and Pd acting as catalytic metals, zeolite, a Ce-containing oxide, and activated alumina, and the upper catalytic layer 3 contains activated alumina loading an Rh-doped Ce-containing oxide and an NOx storage material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.