Method for removing sulfur dioxide from flue gases

Patent · Tue May 23 04:00:00 EDT 1978

OSTI ID:6755069

Pessel, L

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, alumimum 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 is repeated.

• Assignee: American Electronic Labs., Inc.
• Patent Number(s): US 4091075
• OSTI ID: 6755069
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
424000* -- Engineering-- Pollution Control Equipment-- (1980-1989)
AIR POLLUTION CONTROL
ALUMINIUM COMPOUNDS
ALUMINIUM SULFATES
AQUEOUS SOLUTIONS
CHALCOGENIDES
CHEMICAL REACTIONS
DESULFURIZATION
DISPERSIONS
EQUIPMENT
FLUE GAS
GASEOUS WASTES
IRON COMPOUNDS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
SCRUBBERS
SOLUTIONS
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TRANSITION ELEMENT COMPOUNDS
WASTES