Method for urea decomposition and ammonia feed to a selective catalytic reduction system
US8815197B2 · kind B2 · utility
7Cited by
11References
21Claims
0Family size
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Key dates
| Filing date | Oct 7, 2013 |
| Grant date | Aug 26, 2014 |
| Priority date | — |
| Expiry date | Oct 7, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2251/2067
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of reducing NOx emissions from a lean burn combustion source employs an aqueous solution of reagent that is injected into a continuous decomposition duct at a rate of 0.2-10 gph with a flowing side stream of hot gas at a rate of 150-3000 scfm and a temperature of greater than 700° F. in the decomposition duct such that the aqueous reagent is converted to ammonia gas that is conveyed by the continuous decomposition duct to an ammonia injection grid that is placed in a primary exhaust stream from the combustion source upstream of a NOx reducing catalyst and NOx is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.