Methods for reducing NO.sub.x emissions from combustion effluent

Details Methods for reducing NO.sub.x emissions from combustion effluent Methods for reducing NO.sub.x emissions from combustion effluent

1990-11-09

1992-06-02

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423239, C01B 2100, B01J 800

Patent

active

051184818

ABSTRACT:
Methods for reducing NO.sub.x emissions from stationary combustion systems having variable flue gas temperatures and variable CO levels in the combustion effluents are disclosed. The present invention represents an improvement in the Thermal DeNO.sub.x process. Use of a condensed phase precursor of gaseous ammonia which causes a delay between initial mixing and reacting with the flue gas substantially reduces or eliminates the adverse effects of variable CO levels, and to a certain extent variable flue gas temperatures. Use of a condensed phase precursor of gaseous ammonia in combination with a second reducing agent dramatically increases the useful temperature range of the Thermal DeNO.sub.x process.

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Anna-Karin Hjalmarsson, NO.sub.x Control Technologies for Coal Combustion pp. 54-58.

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