Combustion and desulfurization of coal in a fluidized bed of limestone

Conference · Tue Jan 01 04:00:00 EST 1974

OSTI ID:7275068

Hoke, R C; Ruth, L A; Shaw, H

The combustion and desulfurization of coal in a fluidized bed of limestone were studied as part of an effort to develop an in situ flue gas desulfurization system for the generation of clean power at low cost. Studies of the coal combustion step were made at pressures up to 9 atm. Sulfur dioxide removal rates of over 90 percent were measured, and nitric oxide levels were well within the current Environmental Protection Agency standard. The regeneration step was studied at pressures up to 10 atm and temperatures up to 2100/sup 0/F. The measured SO/sub 2/ concentration in the product gas from the regenerator averaged about 40-50 percent of the maximum concentration calculated by assuming the solids and gases were in chemical equilibrium. At 10 atm pressure, the measured SO/sub 2/ concentration was around 2 percent. High conversion of calcium sulfate to lime was obtained by adding auxiliary air directly to the fluidized bed.

• OSTI ID: 7275068
• Country of Publication: United States
• Language: English

Related Subjects

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010800 -- Coal
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& Peat-- Waste Management
014000* -- Coal
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20 FOSSIL-FUELED POWER PLANTS
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CARBONACEOUS MATERIALS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
DESULFURIZATION
ENERGY SOURCES
FLUE GAS
FLUIDIZED-BED COMBUSTION
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
GASEOUS WASTES
LIMESTONE
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POWER PLANTS
REGENERATION
REMOVAL
RESERVOIR ROCK
ROCKS
SEDIMENTARY ROCKS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMAL POWER PLANTS
WASTES