Method and composition for removing sulfur dioxide from flue gases
In a ''first'' scrubbing operation, the sulfur dioxide containing flue gas is scrubbed with an aqueous solution containing ferric sulfate and aluminum sulfate. The ferric sulfate oxidizes the sulfur dioxide to sulfuric acid, which dissolves in the solution, and is reduced to ferrous sulfate, in a subsequent ''second'' scrubbing operation, the solution, now containing ferrous sulfate, aluminum sulfate, and sulfuric acid, is scrubbed with air. This regenerates, or re-oxidizes the ferrous sulfate to ferric sulfate. The presence of aluminum sulfate accelerates the rate of regeneration. The regenerated solution is then returned to its function in a ''first'' scrubbing operation, and the indicated cycle of ''first'' and ''second'' scrubbing operations are repeated.
- Assignee:
- American Electronic Laboratories, Inc.
- Patent Number(s):
- US 4157988
- OSTI ID:
- 5920335
- Country of Publication:
- United States
- Language:
- English
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Process for regenerating sulfur dioxide gas scrubbing solutions
Method of removing sulfur dioxide from flue gases
Related Subjects
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTIONS
DESIGN
DESULFURIZATION
EQUIPMENT
FLUE GAS
GASEOUS WASTES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SCRUBBERS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES