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Removal of sulfur and nitrogen oxides with aqueous absorbent

Patent ·
OSTI ID:7070201

Sulfur oxides and nitrogen oxides are removed from flue gas by scrubbing the flue gas with an aqueous ammoniacal solution containing ammonium thiosulfate and either ammonium sulfite or ammonium hydroxide. The presence of ammonium thiosulfate in the absorbent solution also inhibits the oxidation of sulfur dioxide to hexavalent sulfur. The scrubber effluent solution or a portion thereof is acidified in order to liberate sulfur dioxide in a concentrated stream.

Assignee:
TIC; ERA-03-047391; EDB-78-095205
Patent Number(s):
US 4086324
OSTI ID:
7070201
Country of Publication:
United States
Language:
English

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Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
ABSORPTION
AIR POLLUTION CONTROL
AMMONIA
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHEMICAL REACTIONS
DENITRIFICATION
DESULFURIZATION
DISPERSIONS
EQUIPMENT
FLUE GAS
FOSSIL-FUEL POWER PLANTS
GASEOUS WASTES
HYDRIDES
HYDROGEN COMPOUNDS
HYDROXIDES
MIXTURES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
REMOVAL
SCRUBBERS
SOLUTIONS
SULFATES
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
WASTES