Selective non-catalytic reduction

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Selective Non Catalytic Reduction (SNCR) is a method for reducing nitrogen oxide emissions in conventional power plants that burn biomass. The process involves injecting either ammonia or urea into the firebox of the boiler at a location where the flue gas is between 1600 ^oF and 2100 ^oF to react with the nitrogen oxides formed in the combustion process. The resulting product of the chemical reaction is elemental nitrogen (N₂) and water (H₂O).