Method and apparatus for the purification of exhaust gas from a compression ignition engine
US8603941B2 · kind B2 · utility
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4References
3Claims
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Key dates
| Filing date | Oct 11, 2007 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Nov 4, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and apparatus for the removal of NO2 emission from a lean burn compression ignition engine, wherein NO2 containing engine exhaust gas is brought in contact with a catalyst being active in the reduction of NO2 to NO and comprising at least one platinum group metal with the proviso that the platinum metal is not platinum and at least one redox active metal oxide and thereby reducing NO2 contained in the exhaust gas to NO by reaction with CO, hydrocarbons and/or soot being present in the exhaust gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.