Oxidation of calcium sulfide in fluidized bed combustion/regeneration conditions

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:287963

Ninomiya, Y; Sato, A ^[1]; Watkinson, A P ^[2]

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1. Chubu Univ., Kasugai, Aichi (Japan). Dept. of Industrial Chemistry
2. Univ. of British Columbia, Vancouver, British Columbia (Canada). Dept. of Chemical Engineering

Thermal analysis-mass spectrometry was used to study the oxidation reactions of CaS at atmospheric pressure. The experiments were conducted at temperatures up to 1,200 C and with samples containing a mole fraction of CaS between 0.169 and 0.852. The oxidation reaction of CaS began from about 600 C. below 1,063 C the outside shell of the sample became covered with a CaSO{sub 4} product layer and the oxidation reaction ceased due to increasing intraparticle diffusion resistance to the reactant gas. 10 to 50% of unreacted CaS remained in the inside shell. Above 1,063 C, this reaction was accompanied by another exothermic process which involved a weight loss and SO{sub 2} evolution. Above 1,180 C CaS in the sample was essentially converted to CaO and CaSO{sub 4}, with the resulting CaS mole fraction below 0.002.

• OSTI ID: 287963
• Report Number(s): CONF-950522--; ISBN 0-7918-1305-3
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
AIR POLLUTION ABATEMENT
ATMOSPHERIC PRESSURE
CALCIUM OXIDES
CALCIUM SULFATES
CALCIUM SULFIDES
CHARS
CHEMICAL REACTION KINETICS
COAL GASIFICATION
COMBINED-CYCLE POWER PLANTS
EXPERIMENTAL DATA
FLUIDIZED-BED COMBUSTION
FLUIDIZED-BED COMBUSTORS
GAS GENERATORS
HOT GAS CLEANUP
OXIDATION
PERMEABILITY
PROTECTIVE COATINGS
SORBENT INJECTION PROCESSES
TEMPERATURE DEPENDENCE