Nitrogen oxides reducing agent and a phosphate
US5489420A · kind A · utility
8Cited by
10References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1994 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Mar 10, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Processes and compositions enable selective noncatalytic reduction (SNCR) in the gas phase at temperatures above 950.degree. C. to reduce the environmental damage caused by NO.sub.x and related emissions. By utilizing a nitrogenous NO.sub.x -reducing agent, such as urea, in combination with a phosphate at a ratio of nitrogen in the NO.sub.x -reducing agent to phosphorous of less than about 50:1, NO.sub.x reduction is improved and carbon monoxide, nitrous oxide and ammonia are maintained at low levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.