Kinetics of the reactions of hydrogen sulfide and carbonyl sulfide with spherical zinc oxide particles

Thesis/Dissertation · Sat Jan 01 04:00:00 EST 1977

OSTI ID:6108727

Gibson, J B

Kinetics of the reactions of hydrogen sulfide and carbonyl sulfide with spherical zinc oxide particles were studied at 325/sup 0/ to 814/sup 0/C and 1 atm by using a modified thermogravimetric analyzer in connection with the proposed use of zinc oxide as a sulfur acceptor for a coal-fueled combined gas and steam (COGAS) electrical generation system. The concentration of the sulfur gas species was 1 to 8 mol %, and hydrogen or carbon monoxide and carbon dioxide had to be added to the reaction systems to prevent decomposition of the reactant gas. The data were mathemtaically modeled by the unreacted core, volumetric, and grain gas-solid reaction models. Although the reactions were rapid and became internal diffusion controlled at 400 to 500/sup 0/C, zinc oxide is probably only of limited value as a sulfur acceptor in a COGAS-type process. The reasons for this are that below 600/sup 0/C, complete conversion to zinc sulfide cannot be obtained; zinc oxide begins to decompose to zinc vapor and oxygen at 700 to 800/sup 0/C; and evidence of sintering was found above 500/sup 0/C. The simple unreacted core model described the reactions as well or better than the two more complex models. However, only the grain model seems to have the potential to explain the incomplete conversion below 600/sup 0/C.

• OSTI ID: 6108727
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
010600 -- Coal
Lignite
& Peat-- Properties & Composition
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CARBON SULFIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COGAS PROCESS
COGENERATION
DESULFURIZATION
DEUS
ELECTRIC POWER
ELEMENTS
ENERGY SYSTEMS
GRAVIMETRIC ANALYSIS
HIGH TEMPERATURE
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INORGANIC PHOSPHORS
KINETICS
LOW PRESSURE
METALS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PHOSPHORS
POWER
POWER GENERATION
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
STEAM GENERATION
SULFIDES
SULFUR
SULFUR COMPOUNDS
TEMPERATURE DEPENDENCE
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
VERY HIGH TEMPERATURE
ZINC
ZINC COMPOUNDS
ZINC OXIDES
ZINC SULFIDES