Regeneration of calcium-based SO/sub 2/ sorbents for fluidized-bed combustion: engineering evaluation. Annual report December 1975--January 1977
The report gives results of an engineering evaluation of regeneration of calcium-based SO/sub 2/ sorbents (limestone and dolomite) for application in both atmospheric and pressurized fluidized-bed combustion (FBC) processes. Economics of FBC power plants, operated with regeneration, are projected based on current estimates of regeneration process performance. Coal-fueled reductive decomposition is the regeneration process considered for atmospheric FBC; three regeneration schemes (two reductive decomposition processes and a two-step process) are evaluated for pressurized FBC. Estimated costs of FBC power plants with regeneration are compared with costs of FBC plants using once-through sorbent (no regeneration). The economic feasibility of the regenerative system depends on several variables, including in particular the sulfur concentration achievable in the regenerator off-gas, the reduction in fresh sorbent feed rate possible through regeneration, and the cost of fresh sorbent and of solid residue disposal. The performance required for the regenerative FBC system to achieve economic feasibility is projected, and critical development needs are discussed. An integrated regeneration system for both atmospheric and pressurized FBC, capable of achieving the performance necessary, has yet to be demonstrated experimentally.
- Research Organization:
- Westinghouse Electric Corp., Pittsburgh, PA (USA). Research and Development Center
- DOE Contract Number:
- EPA-68-02-2132
- OSTI ID:
- 6491458
- Report Number(s):
- PB-281317
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
DOLOMITE
REGENERATION
FLUIDIZED-BED COMBUSTION
ADSORBENTS
FOSSIL-FUEL POWER PLANTS
LIMESTONE
SULFUR DIOXIDE
AIR POLLUTION ABATEMENT
ADSORPTION
COST
ECONOMICS
FEASIBILITY STUDIES
PERFORMANCE
ALKALINE EARTH METAL COMPOUNDS
CARBON COMPOUNDS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
POWER PLANTS
RESERVOIR ROCK
ROCKS
SEDIMENTARY ROCKS
SORPTION
SULFUR COMPOUNDS
SULFUR OXIDES
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
010800 - Coal
Lignite
& Peat- Waste Management