Development program on pressurized fluidized-bed combustion. Annual report, July 1975--June 1976
The feasibility of using fluidized-bed combustors in power and steam plants is being evaluated. The concept involves burning fuels such as coal in a fluidized bed of either a limestone (CaCO/sub 3/) or a synthetically prepared calcium-containing stone. The calcium reacts with the sulfur to form CaSO/sub 4/, which remains in the bed, thus decreasing the level of SO/sub 2/ in the flue gas. Levels of NO/sub x/ in the flue gas are low. In a separate step, the CaSO/sub 4/ is regenerated to CaO by reductive decomposition at Ca/sub solar/ 1100/sup 0/C for reuse in the combustor. Progress is reported on the following: the effect of regeneration operating variables on extent of regeneration and SO/sub 2/ concentration in the off-gas using coal as the source of reducing agent and of heat; the alternate combustion and regeneration behavior of stone; the rate and extent of sulfation of agents impregnated on Al/sub 2/O/sub 3/; the effect of variables on sorption and release of sulfur for CaO-impregnated stone; attrition resistance of stone; the kinetic and structural changes occurring during half-calcination of dolomite; the CaS-CaSO/sub 4/ regeneration reaction; and the volatility of trace elements when heating coal ash. Procurement and disposal of regenerated stone, minimum fluidization studies, modeling of a gas-solid combustion reaction and of the regeneration process, combustion studies using different sizes of coal and additive and also using lignite are reported.
- Research Organization:
- Argonne National Lab., Ill. (USA)
- DOE Contract Number:
- W-31-109-ENG-38; INA-IAG-D5-E681
- OSTI ID:
- 7146849
- Report Number(s):
- ANL/ES-CEN-1016
- Country of Publication:
- United States
- Language:
- English
Similar Records
Supportive studies in fluidized-bed combustion. Quarterly report, July--September 1976
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Related Subjects
42 ENGINEERING
CALCIUM OXIDES
REGENERATION
CALCIUM SULFATES
REDUCTION
COAL
FLUIDIZED-BED COMBUSTION
FLUE GAS
DENITRIFICATION
DESULFURIZATION
FLUIDIZED-BED COMBUSTORS
RESEARCH PROGRAMS
NITROGEN OXIDES
REMOVAL
SULFUR DIOXIDE
ADDITIVES
ALUMINIUM OXIDES
CALCIUM CARBONATES
CALCIUM SULFIDES
CORROSIVE EFFECTS
DOLOMITE
FOSSIL-FUEL POWER PLANTS
LIGNITE
PILOT PLANTS
SORPTION
TRACE AMOUNTS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
BROWN COAL
BURNERS
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTORS
ENERGY SOURCES
FOSSIL FUELS
FUELS
FUNCTIONAL MODELS
GASEOUS WASTES
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERALS
NITROGEN COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POWER PLANTS
RESERVOIR ROCK
ROCKS
SULFATES
SULFIDES
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
WASTES
014000* - Coal
Lignite
& Peat- Combustion
421000 - Engineering- Combustion Systems