Method for the removal of sulfur and nitrogen oxides from gases

Details Method for the removal of sulfur and nitrogen oxides from gases Method for the removal of sulfur and nitrogen oxides from gases

1994-05-25

1995-10-03

Lewis, Michael

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Direct contact with molten material

42324407, 423544, 423545, 423551, 423DIG12, C01B 1748

Patent

active

054550157

ABSTRACT:
Sulfur oxides are removed from a gas containing same by contacting the gas with a system including ammonium, potassium, and/or sodium salts in a solid phase and ammonium, sodium, and/or potassium hydrogen sulfate in a liquid phase. The sulfur oxides react with the solid phase to form a hydrogen sulfate in a liquid phase. The hydrogen sulfate is regenerated and returned to the reaction zone as a sulfate. Sulfuric acid may be produced as a byproduct. Ammonia injection into the gas stream which optionally contains nitrogen oxides, converts the nitrogen oxides into nitrogen. The excess ammonia reacts with the sulfur oxides to precipitates in the sulfur oxides reaction zone.

REFERENCES:
patent: 3552921 (1971-01-01), Blytas
patent: 4244930 (1981-01-01), Weber
patent: 4478801 (1984-10-01), Tominaga et al.
patent: 5114690 (1992-05-01), Moore

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