Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Reexamination Certificate
2011-02-18
2011-11-08
Johnson, Edward (Department: 1736)
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
C423S235000
Reexamination Certificate
active
08052950
ABSTRACT:
A method of decreasing a concentration of nitrogen oxides in a combustion gas flowing through a vessel including: generating a flue gas in a combustion zone of the vessel, the flue gas containing nitrogen oxides and carbon monoxide; providing overfire air into a burnout zone of the vessel from a first injector of overfire air to oxidize at least some of the carbon monoxide in the flue gas; injecting a selective reducing agent concurrent with overfire air at a level in the burnout zone downstream of the first injector of overfire air and downstream of the oxidization of the carbon monoxide, and reacting the selective reducing agent with the flue gas to reduce the nitrogen oxides.
REFERENCES:
patent: 7374735 (2008-05-01), Swanson et al.
Moyeda David Kelly
Payne Roy
Swanson Larry William
Zhou Wei
General Electric Company
Johnson Edward
Nixon & Vanderhye P.C.
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