Pilot testing of sodium thiosulfate
Pilot plant tests have been conducted to evaluate sodium thiosulfate as an oxidation inhibition additive in five lime/limestone slurry flue gas desulfurization processes. It was found that the oxidation rate of absorbed sulfur dioxide (SO)/sub 2/ was reduced by more than 50 percent in the presence of 100 to 200 ppm of thiosulfate ion in the scrubbing slurry. Calcium sulfate dihydrate (gypsum) scaling was eliminated and the unsaturated (with respect to gypsum) operation mode was maintained by the addition of sodium thiosulfate. Other benefits of sodium thiosulfate addition observed at the pilot plant included improvement in solids dewatering properties for limestone processes and improvement in SO/sub 2/ removal efficiency for magnesium-enhanced lime/limestone processes.
- Research Organization:
- Acurex Corp., P.O. Box 13109, Research Triangle Park, NC 27709
- OSTI ID:
- 6834082
- Journal Information:
- Environ. Prof.; (United States), Journal Name: Environ. Prof.; (United States) Vol. 5:4; ISSN EPROD
- Country of Publication:
- United States
- Language:
- English
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Pilot testing of sodium thiosulfate for oxidation/scaling inhibition in lime/limestone flue gas desulfurization systems
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Related Subjects
400201 -- Chemical & Physicochemical Properties
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADDITIVES
ADSORPTION
AIR POLLUTION CONTROL
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM HYDROXIDES
CALCIUM OXIDES
CALCIUM SULFATES
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DESULFURIZATION
DISPERSIONS
FLUE GAS
FUNCTIONAL MODELS
GASEOUS WASTES
GYPSUM
HYDROGEN COMPOUNDS
HYDROXIDES
INHIBITION
LIMESTONE
MINERALS
MIXTURES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PILOT PLANTS
POLLUTION CONTROL
REMOVAL
ROCKS
SCALE CONTROL
SCRUBBING
SEDIMENTARY ROCKS
SLURRIES
SODIUM COMPOUNDS
SODIUM SULFATES
SORPTION
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SUSPENSIONS
TESTING
THIOSULFATES
WASTES
WATER REMOVAL