System for NOx reduction in exhaust gases
US6805849B1 · kind B1 · utility
64Cited by
7References
9Claims
0Family size
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Key dates
| Filing date | Jan 9, 2001 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | Jan 9, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Selective catalytic reduction of NOx in combustion gases, especially from diesel engines, utilizes a system incorporating an oxidation catalyst to convert at least a portion of NO to NO2, a particulate filter downstream of the oxidation catalyst, a source of reductant such as NH3 or urea for injection downstream of the particulate filter, and an SCR catalyst located downstream of the point of injection of the reductant. Considerable improvements in NOx conversion are observed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.