Process for catalytically reducing nitrogen oxides in combustion

Details Process for catalytically reducing nitrogen oxides in combustion Process for catalytically reducing nitrogen oxides in combustion

1993-10-12

1994-12-06

Lewis, Michael

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

4232392, 95 58, 95108, B01J 800, C01B 2100

Patent

active

053708504

ABSTRACT:
A combustion exhaust gas which is to be dedusted and denitrated is mixed with NH.sub.3 and at temperatures in the range of about 250.degree. to 600.degree. C. is passed through a fluidized bed. The fluidized bed contains a denitrating catalyst, which contains FeSO.sub.4. The combustion exhaust gas serves as a fluidizing gas in the fluidized bed. Fresh denitrating catalyst is supplied to the fluidized beg and comprises at least 90% by weight FeSO.sub.4, which contains water of crystallization and has particle size in the range from 1 to 150 micrometers. The treated exhaust gas is dedusted in an electrostatic precipitator.

REFERENCES:
patent: 5219543 (1993-06-01), Weisweiler et al.
The Condensed Chemical Dictionary, Gessner Hawley, 1981 p. 986.
Aldrich, 1990 p. 768.

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