Kinetics and mechanisms of iron sulfide reductions in hydrogen and in carbon monoxide
Journal Article
·
· J. Solid State Chem.; (United States)
The reduction of iron sulfides by hydrogen and by carbon monoxide has been studied using plug flow and thermogravimetric methods. The reactions were studied in the 523-723/sup 0/K temperature range and were found to be first-order processes. Plug flow studies were used to correlate reactions rates between pyrite and the gases as a function of the surface area of the pyrite. The rate of H/sub 2/S formation increases with the surface area of the pyrite sample. The results of thermogravimetric experiments indicate that the reactions consist of several steps. Rate constants for the pyrite reduction by H/sub 2/ and by CO were obtained. The activation energies increased with degree of reduction. Value of E/sub a/ were 113.2 (step I) and 122.5 kJ/mole (step II) for pyrite reduction with CO and 99.4 (step I), 122.4 (step II), 125.2 (step III), and 142.6 kJ/mole (step IV) for pyrite reduction with hydrogen.
- Research Organization:
- Southern Illinois Univ., Carbondale
- OSTI ID:
- 5522996
- Journal Information:
- J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 71:1; ISSN JSSCB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
DATA
DESULFURIZATION
ELEMENTS
ENERGY
ENERGY SOURCES
EXPERIMENTAL DATA
FLUID FLOW
FOSSIL FUELS
FUELS
GRAVIMETRIC ANALYSIS
HYDROGEN
INFORMATION
IRON COMPOUNDS
IRON SULFIDES
KINETICS
MATERIALS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
REDUCTION
SULFIDES
SULFUR COMPOUNDS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSITION ELEMENT COMPOUNDS
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
DATA
DESULFURIZATION
ELEMENTS
ENERGY
ENERGY SOURCES
EXPERIMENTAL DATA
FLUID FLOW
FOSSIL FUELS
FUELS
GRAVIMETRIC ANALYSIS
HYDROGEN
INFORMATION
IRON COMPOUNDS
IRON SULFIDES
KINETICS
MATERIALS
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
REDUCTION
SULFIDES
SULFUR COMPOUNDS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSITION ELEMENT COMPOUNDS