Regenerative method for quantitative removal of sulfur dioxide from stack gases
Sulfur dioxide is removed from stack gases by absorption in an aqueous medium, the preferred embodiment containing a chemical oxidant which generates hydrogen peroxide on a demand that equals the rate sulfur dioxide is absorbed into the medium whereby the absorbed sulfur dioxide is converted to sulfate form. The converted sulfur dioxide is removed in the form of an alkaline earth metal sulfate precipitate and spent oxidant is regenerated for reuse. In the other illustrated embodiments, the aqueous medium is maintained acidic from the start-up of the system. Barium peroxide is the preferred oxidant and acts both as oxidant and precipitant. Alternately, the oxidant and precipitant may be separate compounds.
- Assignee:
- Georgia Tech. Research Inst.
- Patent Number(s):
- US 4100260
- OSTI ID:
- 6624211
- Country of Publication:
- United States
- Language:
- English
Similar Records
Cyclic process for the removal of sulfur dioxide and the recovery of sulfur from gases
Treatment of sulfur oxides with aqueous glyoxylic acid solutions
Related Subjects
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTIONS
DESULFURIZATION
FLUE GAS
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
OXIDES
OXYGEN COMPOUNDS
PEROXIDES
POLLUTION CONTROL
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES