Pilot testing of sodium thiosulfate for oxidation/scaling inhibition in lime/limestone flue gas desulfurization systems

Conference · Tue Jan 01 00:00:00 EST 1985

OSTI ID:6282268

Chang, J C.S.; Brna, T G

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.

• Research Organization: Acurex Corp., P.O. Box 13109, Research Triangle Park, NC 27709
• OSTI ID: 6282268
• Report Number(s): CONF-851123-
• Resource Relation: Conference: American Institute of Chemical Engineers annual winter meeting, Chicago, IL, USA, 10 Nov 1985
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
20 FOSSIL-FUELED POWER PLANTS
01 COAL, LIGNITE, AND PEAT
FLUE GAS
DESULFURIZATION
LIME-LIMESTONE WET SCRUBBING PROCESSES
SCRUBBERS
CORROSION INHIBITORS
SCALE CONTROL
SODIUM SULFATES
CHEMICAL PROPERTIES
SULFUR DIOXIDE
AIR POLLUTION CONTROL
REMOVAL
CALCIUM SULFATES
CHEMICAL REACTORS
DEPOSITS
GYPSUM
HYDRATES
INHIBITION
LIMESTONE
MAGNESIUM
MAGNESIUM SLURRY SCRUBBING PROCESS
OXIDATION
PERFORMANCE
SLURRIES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALKALINE EARTH METALS
CALCIUM COMPOUNDS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DISPERSIONS
ELEMENTS
EQUIPMENT
GASEOUS WASTES
METALS
MINERALS
MIXTURES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
ROCKS
SCRUBBING
SEDIMENTARY ROCKS
SODIUM COMPOUNDS
SULFATE MINERALS
SULFATES
SULFUR COMPOUNDS
SULFUR OXIDES
SUSPENSIONS
WASTES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
200202 - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
010800 - Coal
Lignite
& Peat- Waste Management