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Sulphur Oxidation States in Residues from a Small-Scale Circulating Fluidized Bed Combustor

Published online by Cambridge University Press:  21 February 2011

E. E. Berry ,
R. T. Hemmings ,
B. J. Cornelius  and
E. J. Anthony
E. E. Berry
Affiliation:
Matex Consultants Inc., Mississauga, Ontario, Canada L4Z 2G7
R. T. Hemmings
Affiliation:
Ortech International, Sheridan Park, Mississauga, Ontario, Canada L5K 1B3
B. J. Cornelius
Affiliation:
Ortech International, Sheridan Park, Mississauga, Ontario, Canada L5K 1B3
E. J. Anthony
Affiliation:
CANMET, Energy, Mines and Resources Canada, Ottawa, Canada
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Abstract

Significant concentrations (∼6%, as CaS) of sulphides or other reduced-sulphur species in solid residues from a small-scale circulating fluidized bed (CFB) combustor have been reported in the literature. The presence of sulphides in similar quantities in residues from a utility-scale combustor would present significant difficulties with handling, disposal or utilization of the residues. This paper discusses the preliminary findings of an investigation of sulphur capture in a small-scale circulating fluidized bed combustion (CFBC) unit using a limestone bed and burning a high-S, high-Fe, Eastern Canadian coal. Data are presented on sulphur capture and chemical speciation for residue samples taken from a number of locations in the circulating bed during operation. The results are discussed in terms of probable mechanisms for the formation of sulphur compounds of reduced oxidation state in the bed and the combustion-gas cleaning system.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 136: Symposium O – Fly Ash and Coal Conversion By-Products V , 1988 , 9
Copyright
Copyright © Materials Research Society 1989

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References

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