Emissions treatment system with NSR and SCR catalysts
US7490464B2 · kind B2 · utility
25Cited by
13References
12Claims
0Family size
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Key dates
| Filing date | Oct 29, 2004 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Apr 4, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Provided is an emissions treatment system for an exhaust stream, having a NOx storage reduction (NSR) catalyst with a NOx sorbent at a concentration of at least 0.1 g/in3 and a platinum group metal component dispersed on a refractory metal oxide support; and, an SCR catalyst disposed downstream of the NSR catalyst. The emissions treatment system is advantageously used for the treatment of exhaust streams from diesel engines and lean burn gasoline engines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.