Method of removing nitrogen oxides from an exhaust

Details Method of removing nitrogen oxides from an exhaust Method of removing nitrogen oxides from an exhaust

1976-05-12

1977-10-18

Peters, G. O.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

75 1R, 23288G, B01D 5334

Patent

active

040546403

ABSTRACT:
A method of removing nitrogen oxides from an exhaust which comprises the steps of contacting an exhaust containing nitrogen oxides and ammonia with a reducing catalyst received in a reactor to reduce the nitrogen oxides to nitrogen gas, wherein iron ore catalyst lumps having a particle size of 25 mm or less and forming a catalyst bed in the reactor are used as a reducing catalyst; the iron ore lumps of the catalyst bed are let to fall gravitationally through the reactor continuously or intermittently; and the iron ore catalyst lumps discharged from the reactor are either used as raw material for iron manufacture or fed back to the reactor to be reused as a reducing catalyst after being sieved.

REFERENCES:
patent: 2755174 (1956-07-01), Weber
patent: 3959440 (1976-05-01), Mizuno et al.

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