Catalytic/non-catalytic combination process for nitrogen oxides reduction

Patent · Tue Aug 18 04:00:00 EDT 1992

OSTI ID:7154146

Luftglass, B K; Sun, W H; Hofmann, J E

This patent describes a process for the reduction of nitrogen oxides in the effluent from the combustion of a carbonaceous fuel. It comprises introducing a nitrogenous treatment agent comprising urea, one or more of the hydrolysis products of urea, ammonia, compounds which produce ammonia as a by-product, ammonium salts of organic acids, 5- or 6-membered heterocyclic hydrocarbons having at least one cyclic nitrogen, hydroxy amino hydrocarbons, or mixtures thereof into the effluent at an effluent temperature between about 1200{degrees} F and about 2100{degrees} F; and contacting the treated effluent under conditions effective to reduce the nitrogen oxides in the effluent with a catalyst effective for the reduction of nitrogen oxides in the presence of ammonia.

• Assignee: Fuel Tech, Inc., Rowayton, CT (United States)
• Patent Number(s): US 5139754; A
• Application Number: PPN: US 7-626439
• OSTI ID: 7154146
• Country of Publication: United States
• Language: English

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