Process for the reduction of nitrogen oxides in an effluent

Patent · Tue Sep 13 04:00:00 EDT 1988

OSTI ID:6662468

Epperly, W R; Sullivan, J C

A process is described for reducing the concentration of nitrogen oxides in an effluent from the combustion of a carbonaceous fuel, which process comprises injecting into the effluent ammonia and an enhancer selected from the group consisting of hexamethylenetetramine, a lower carbon alcohol, a hydroxyl amino hydrocarbon, sugar, furfural, furfural derivatives, an amino acid, a protein-containing composition, mixtures of ortho-, meta-, and para-methyl phenols, guanidine, guanidine carbonate, biguanidine, guanylurea sulfate, melamine, dicyandiamide, calcium cyanamide, biuret, 1,1'-azobisformamide, methylol urea, methylol urea-urea condensation product, dimethylol urea, methyl urea, dimethyl urea, and mixtures thereof, at an effluent temperature above about 1300/sup 0/F and a molar ratio of nitrogen in the ammonia and enhancer to the baseline nitrogen oxides level of about 1:5 to about 6:1 wherein the excess of oxygen in the effluent is no greater than about 6%.

• Assignee: Fuel Tech, Inc., Stamford, CT
• Patent Number(s): US 4770863
• OSTI ID: 6662468
• Country of Publication: United States
• Language: English

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54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
ALCOHOLS
ALDEHYDES
AMIDES
AMINES
AMINO ACIDS
AMMONIA
AROMATICS
CARBOHYDRATES
CARBON COMPOUNDS
CARBONATES
CARBONIC ACID DERIVATIVES
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
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DENITRATION
FURANS
FURFURAL
GASEOUS WASTES
GUANIDINES
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
HYDRIDES
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHENOLS
POLLUTION CONTROL
PROTEINS
REMOVAL
SACCHARIDES
UREA
WASTES