Reduction of nitrogen- and carbon-based pollutants

Abstract From the Canadian patent

Disclosed is a process for reducing nitrogen oxides in an effluent from the combustion of a carbonaceous fuel under oxygen-rich conditions which minimize the production of carbon-based pollutants. A dispersion of a solution comprising at least one additive compound selected from the group consisting of guanidine, guanidine carbonate, biguanide guanylurea sulfate, melamine, dicyandiamide calcium, cyanamide, biuret, 1,1'-azobisformamide methylol, urea, methylol urea-urea condensation product dimethylol urea, methyl urea, dimethyl urea and, hexamethylenetetramine is injected into an effluent at a temperature above 1300°F, and preferably above 1500°F. The concentration of the additive compound …