Experiences in regenerating sulfated limestone from fluidized-bed combustors

Conference · Sun Jan 01 04:00:00 EST 1978

OSTI ID:6728188

Vogel, G. J.; Montagna, J.; Swift, W.; Jonke, A. A.

The experiences at Argonne National Laboratory in developing a process for regenerating the partially sulfated limestone product from a fluidized-bed combustion process are described. Studies of candidate processes and the further development of the reductive-decomposition process wherein CaSO/sub 4/ is converted to CaO in a fluidized bed at 1100/sup 0/C are discussed. Reductive decomposition reaction rates are rapid--less than 10 minutes is required for effective regeneration. A gas containing SO/sub 2/ at concentrations near 10% is produced. Stones were cycled batchwise between the combustor and regenerator to demonstrate that reactivity of the stone can be sufficiently maintained and that attrition rate of particles in the fluid bed is low. Regeneration can significantly reduce the quantity of fresh stone required in the combustion step.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6728188
• Report Number(s): CONF-780438--2
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
014000 -- Coal
Lignite
& Peat-- Combustion
ALKALINE EARTH METAL COMPOUNDS
BURNERS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
DECOMPOSITION
ENERGY SOURCES
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
FOSSIL FUELS
FUELS
LIMESTONE
OXIDATION
OXIDES
OXYGEN COMPOUNDS
REGENERATION
RESERVOIR ROCK
ROCKS
SEDIMENTARY ROCKS
SORPTIVE PROPERTIES
SULFATES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES