Method and apparatus for reducing the nitrogen oxides in flue ga

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component

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422177, 422219, B01D 5356, B01D 5388

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active

054747511

ABSTRACT:
Combustion systems have a combustion apparatus, heating surfaces downstream of the combustion apparatus in a flue gas stream, and a deNO.sub.x catalyst. A method for reducing nitrogen oxides in the flue gas of the combustion systems includes selectively assigning the deNO.sub.x catalyst to a position inside and a position outside the flue gas stream as a function of a nitrogen oxide concentration or of a selected energy carrier. An apparatus for reducing nitrogen oxides in the flue gas of the combustion system includes a device for selectively assigning the deNO.sub.x catalyst to a position inside and a position outside a line through which the flue gas flows.

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