Method of removal of nitrogen oxides

Details Method of removal of nitrogen oxides Method of removal of nitrogen oxides

1976-02-25

1977-01-11

Peters, G. O.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

B01D 5334

Patent

active

040027236

ABSTRACT:
Nitrogen oxides in an exhaust gas are selectively removable by employing ammonia as a reductant and by employing a catalyst composed of alumina, copper, and at least one of the alkali metals, the alkaline earth metals and the transition metals. Optionally, the catalyst composition may include a slight amount (less than 1% by weight) of a precious metal such as rhodium, ruthenium, plantinum and palladium. This selective removal of nitrogen oxides is not impaired by the presence of O.sub.2, H.sub.2 O and SO.sub.2 in the exhaust gas.

REFERENCES:
patent: 2975025 (1961-03-01), Cohn et al.
patent: 3449063 (1969-06-01), Griffing et al.
patent: 3791992 (1974-02-01), Fedwick
patent: 3864451 (1975-02-01), Lee et al.

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