Method and emission control system for catalytically reducing nitrogen oxides in the exhaust gas of a combustion system
US7241431B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Dec 16, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and an emission control system are for catalytically reducing nitrogen oxides in the exhaust gas of a combustion system, especially a diesel motor. An oxidation catalyst is arranged upstream in relation to the reduction catalyst and in the exhaust gas channel. A reaction agent for decomposing nitrogen oxides according to the method of the selective catalytic reduction is added according to the temperature and upstream or downstream in relation to the oxidation catalyst and upstream in relation to the reduction catalyst. The selectivity of the oxidation catalyst is used for decomposing nitrogen oxides to form molecular nitrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.