Regeneration of calcium-based SO/sub 2/ sorbents for fluidized-bed combustion: engineering evaluation. Annual report December 1975--January 1977

Technical Report · Wed Mar 01 04:00:00 EST 1978

OSTI ID:6491458

Newby, R A; Katta, S; Keairns, D L

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
• OSTI ID: 6491458
• Report Number(s): PB-281317
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800 -- Coal
Lignite
& Peat-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202* -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
ADSORBENTS
ADSORPTION
AIR POLLUTION ABATEMENT
ALKALINE EARTH METAL COMPOUNDS
CARBON COMPOUNDS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
COST
DOLOMITE
ECONOMICS
FEASIBILITY STUDIES
FLUIDIZED-BED COMBUSTION
FOSSIL-FUEL POWER PLANTS
LIMESTONE
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION ABATEMENT
POWER PLANTS
REGENERATION
RESERVOIR ROCK
ROCKS
SEDIMENTARY ROCKS
SORPTION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES