Pilot testing of sodium thiosulfate
The article gives results of pilot-plant tests 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 SO/sub 2/ was reduced by more than 50% in the presence of 100-200 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., Research Triangle Park, NC (USA)
- OSTI ID:
- 6535114
- Report Number(s):
- PB-87-167706/XAB
- Country of Publication:
- United States
- Language:
- English
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Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION ABATEMENT
ALKALI METAL COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTORS
DESULFURIZATION
ENERGY SOURCES
FLUE GAS
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
GASEOUS WASTES
LIME-LIMESTONE WET SCRUBBING PROCESSES
MATERIALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PILOT PLANTS
POLLUTION ABATEMENT
SCRUBBING
SODIUM COMPOUNDS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THIOSULFATES
WASTES