Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Patent
1997-05-02
1998-05-26
Bos, Steven
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
B01J 800
Patent
active
057560595
ABSTRACT:
The present invention is related to methods and systems for preventing the release of nitrogen oxides with combustion flue gases emitted to the atmosphere. The invention is specifically directed to the removal of nitric oxide, nitrogen dioxide, and nitrous oxide from flue gas in stationary combustion systems. The methods of the invention improve efficiency of conventional reburning and advanced reburning processes by two key improvements, including the injection of a reducing agent into the reburning zone and the use of promoters, which considerably enhance NO.sub.x control. The promoters are metal-containing compounds that can be added to the reducing agents. These improvements allow either one or two stages of reducing agent injection for greater NO.sub.x control.
REFERENCES:
patent: 3900554 (1975-08-01), Lyon
patent: 4208386 (1980-06-01), Arand et al.
patent: 4325924 (1982-04-01), Arand et al.
patent: 4335084 (1982-06-01), Brogan
patent: 4403941 (1983-09-01), Okiura et al.
patent: 4851201 (1989-07-01), Heap et al.
patent: 4861567 (1989-08-01), Heap et al.
patent: 5116584 (1992-05-01), Chen et al.
patent: 5139755 (1992-08-01), Seeker et al.
patent: 5224334 (1993-07-01), Bell
patent: 5270025 (1993-12-01), Ho et al.
patent: 5443805 (1995-08-01), Beer et al.
Hsieh, B.C. et al., An Analysis of Chemistry and Mechanisms for High Temperature Desulfurization of Low BTU Gas When Using Lime or Limestone, Gilbert Associates, Inc., 1974. (No month).
Chen et al., Advanced Non-Catalytic Post Combustion NO.sub.x Control, Environmental Progress, vol. 10, No. 3,pp. 182-185 (1991). (no month).
Lyon et al., Discovery and Development of the Thermal DeNO.sub.x Process, Ind. Eng. Chem. Fundam., vol. 25, No. 1, pp. 19-24 (1986). (no month).
Miller et al., Mechanism and Modeling of Nitrogen Chemistry in Combustion, Prog. Energy Combust. Sci., vol. 15, pp. 287-338 (1989). (no month).
Gullett, et al., Furnace Slurry Injection for Simultaneous SO.sub.2 /NO.sub.2 Removal, The 1991 SO.sub.2 Control Symposium, vol. 2: Sessions 5A-6B, pp. 87-103 (Dec. 1991).
Eckhart et al., Cyclone Reburn Using Coal-Water Fuel, Report DOE/PC/90157-1, sponsored by U.S. Department of Energy and Pittsburgh Energy Technology Center (Oct. 1991).
Maly Peter M.
Seeker William Randall
Zamansky Vladimir M.
Bos Steven
Dunn Jr. Thomas G.
Energy and Environmental Research Corporation
Taylor, Esq. Gregory M.
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