NOx reduction catalyst and NOx reduction system
US6866834B2 · kind B2 · utility
11Cited by
11References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 20, 2002 |
| Grant date | Mar 15, 2005 |
| Priority date | — |
| Expiry date | Nov 19, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J23/58
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A NOx reduction catalyst for exhaust gas discharged from an automotive internal combustion engine operable in a lean region and in a range including a stoichiometric region and a rich region. The NOx reduction catalyst comprises a catalytic noble metal. Additionally, an oxygen adsorbable and releasable material is provided carrying at least a part of the catalytic noble metal. In this catalyst, the catalytic noble metal carried on the oxygen adsorbable and releasable material adsorbs SOx in the exhaust gas, in a form of at least one of sulfate and sulfite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.