Method for reducing NO.sub.x emissions from combustion processes
US4335084A · kind A · utility
41Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1981 |
| Grant date | Jun 15, 1982 |
| Priority date | — |
| Expiry date | Jun 19, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/56
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a method for the noncatalytic reduction of NO.sub.x in combustion gases which method includes maintaining an excess of fuel to air during combustion, cooling the combustion gases to between 2400.degree. F. and 3000.degree. F., and injecting into the cooled gases ammonia in a ratio 1:1 to 1:4 NO.sub.x to NH.sub.3. After the ammonia has been injected to reduce the NO.sub.x, the gas is further cooled to between 1900.degree. F. and 2300.degree. F. and secondary air injected into the gases to complete combustion of the fuel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.