Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Nitrogen or nitrogenous component
Patent
1990-09-20
1992-01-07
Heller, Gregory A.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Nitrogen or nitrogenous component
423212, 423235, B01J 800, C01B 1700, B01D 4700
Patent
active
050789821
ABSTRACT:
A method is described for reducing the nitrogen oxide content of an effluent gas stream which comprises contacting the effluent gas with an amount of formaldehyde which is effective in reducing the nitrogen oxide content of the gas. In one preferred embodiment, the formaldehyde is contacted with the effluent stream in the presence of a catalyst which promotes the reaction between the formaldehyde and the nitrogen oxide contained in the gas stream. Preferred catalysts comprise zirconium, cerium, or mixtures thereof. Catalysts comprising zirconium in the plus four oxidation state, cerium in the plus four oxidation state, or mixtures thereof are particularly preferred catalysts.
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Gardner-Chavis Ralph A.
May Micahel P.
Heller Gregory A.
Molecular Technology Corporation
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