Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Patent
1989-07-10
1991-10-08
Heller, Gregory A.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
423239, 4232453, C01B 2100, B01J 800, C10H 2300
Patent
active
050552783
ABSTRACT:
A procedure is disclosed for substantially decreasing the amount of nitrogen oxides (NO.sub.x) in waste furnace gases during the combustion of fossil fuel, in which as a primary measure, the fuel is subjected in the combustion space to a stepped, pyrolyzing combustion with low combustion temperatures and decreased available oxygen (substoichiometric amounts) in the reaction zone and with prolonged residence times in the combustion space and then as a secondary measure, the reactive waste gas components, which are thereby formed to an increased extent, such as carbon monoxide (CO), hydrocarbons (CH), etc. are eliminated, if necessary with the addition of more air, by catalytic oxidation at a temperature within the range of 800.degree. C. to 200.degree. C., before the waste gases reach the atmosphere.
REFERENCES:
patent: 3873671 (1975-03-01), Reed et al.
patent: 4418045 (1983-11-01), Sato et al.
patent: 4519993 (1985-05-01), McGill et al.
patent: 4528170 (1985-07-01), Koecker et al.
"Technische Mitteilungen" (Technical Communications), vol. 80, No. 9, Nov./Dec. 1987, pp. 566-572.
Apparatebau Rothemuhle Brandt
Heller Gregory A.
Kritzler Gesellschaft mit beschrankter Haftung
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