Kinetic studies on the sulfidation of iron by sulfur bearing low-Btu gases
The use of a low-Btu gas as a reducing agent for iron oxide was shown to be favorable at temperatures of 800/sup 0/C or greater. Little benefit was seen in terms of increased reduction rates at higher pressures (up to 5 atmospheres) or in varying either the H/sub 2/ concentration or CO/CO/sub 2/ ratio, within the range of a low-Btu gas. Sulfidation was found to occur in reaction with iron and not iron oxide. It was found that to avoid contamination of the reduced iron, very low levels of H/sub 2/S are necessary in the gas phase (approx. =0.05%). Kinetic data for the sulfidation of reduced iron oxide discs by a sulfur bearing low-Btu gas were taken to clarify the mechanism for the sulfidation reaction. Sulfidation was found to increase with H/sub 2/S concentration, system pressure and temperature, and to depend weakly on H/sub 2/ concentration and CO/CO/sub 2/ ratio. A model based on combined Multicomponent and Knudsen diffusion through the FeS product layer was developed and used to describe sulfidation. 40 refs., 16 figs.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Carnegie-Mellon Univ., Pittsburgh, PA (USA). Dept. of Chemical Engineering
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5371847
- Report Number(s):
- LA-UR-88-659; CONF-880476-1; ON: DE88006071
- Resource Relation:
- Conference: William O. Philbrook memorial symposium on the fundamentals of iron and steelmaking, Toronto, Canada, 17 Apr 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
IRON OXIDES
REDUCTION
SULFIDATION
CHEMICAL REACTION KINETICS
HIGH TEMPERATURE
HYDROGEN SULFIDES
IRON
IRON SULFIDES
LOW BTU GAS
MATHEMATICAL MODELS
PRESSURE EFFECTS
TEMPERATURE EFFECTS
VERY HIGH TEMPERATURE
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROGEN COMPOUNDS
IRON COMPOUNDS
KINETICS
METALS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties