Reducing NO.sub.x emissions from an engine by selective catalytic reduction utilizing solid reagents
US5809775A · kind A · utility
115Cited by
14References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1997 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Apr 2, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Urea or other solid NO.sub.x -reducing reagent is employed in a selective catalytic reduction process on emissions from diesel and lean-burn gasoline engines. The solid reagent is fed to a gas generator that produces a reactant gas by heating. In one embodiment the reactant gas is maintained at elevated temperatures to prevent condensation products from forming. The reactant gas contains ammonia and is fed to the exhaust on an as-needed basis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.