Criteria for the selection of SO/sub 2/ sorbents for atmospheric pressure fluidized-bed combustors. Volume 2. Tasks II and III report: experimental work, sorbent selection technique. Final report, November 1, 1976-July 31, 1977
Five limestones were tested in the laboratory to evaluate their suitability as sulfur removal sorbents in atmospheric pressure fluidized-bed combustion. Physical characterization of the sorbents (grain size and pore-volume distribution) and chemical analyses were followed by reactivity tests in a thermogravimetric (TG) apparatus and by batch sulfation in a fluidized-bed unit. The distribution of sulfur in the sulfated products was determined by an electron microprobe. Reactivity studies covered a range of particle sizes, temperatures, and precalcination treatment. The reactivity data from TG and fluidized-bed studies were compared and found to be consistent, and the desulfurization data correlated well with the Babcock and Wilcox results on a fluid-bed coal combustor. The data were used to project the effect of operating variables (bed height, superficial velocity, and coal sulfur content) on the limestone consumption required for desulfurization. Analysis of the data does not reveal an a priori basis for selecting sorbents, but sorbent performance can be projected after TG tests. A standard sorbent selection procedure is recommended. It is also recommended that the self-consistent body of data collected be analyzed using a currently available mathematical model of the gas/solid reaction.
- Research Organization:
- Westinghouse Research and Development Center, Pittsburgh, PA (USA)
- OSTI ID:
- 5495197
- Report Number(s):
- EPRI-FP-1307(Vol.2)
- Country of Publication:
- United States
- Language:
- English
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FLUE GAS
DESULFURIZATION
FLUIDIZED-BED COMBUSTORS
AIR POLLUTION CONTROL
LIMESTONE
CHEMICAL ANALYSIS
PHYSICAL PROPERTIES
SORPTIVE PROPERTIES
SULFUR DIOXIDE
ATMOSPHERIC PRESSURE
CONSUMPTION RATES
EVALUATION
FOSSIL-FUEL POWER PLANTS
GRAIN SIZE
GRAPHS
MATHEMATICAL MODELS
NUMERICAL DATA
PARTICLE SIZE
SULFUR
TABLES
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THERMAL GRAVIMETRIC ANALYSIS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTORS
CRYSTAL STRUCTURE
DATA
DATA FORMS
ELEMENTS
GASEOUS WASTES
GRAVIMETRIC ANALYSIS
INFORMATION
MICROSTRUCTURE
NONMETALS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POWER PLANTS
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RESERVOIR ROCK
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