Kinetic elements in thermophilic-microbial leaching of sulfur from coal. [Sulfolobus acidocaldarius]

Conference · Fri Jan 01 04:00:00 EST 1988 · Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States)

OSTI ID:5956127

Chen, C C.Y.; Skidmore, D R

A mechanism found suitable for pyritic sulfur removal from coal by mesophilic organisms has been modified and evaluated for the same reaction by the thermophile: Sulfolobus acidocaldarius. The mechanism as modified includes direct and indirect mechanistic elements whose magnitudes were determined experimentally at leaching conditions with and without microbes. Chemical leaching of pyrite by Fe(III) ions and the chemical oxidation of Fe(II) to Fe(III) were found to contribute significantly to overall conversions at thermophilic temperature (72/degree/C) but not at mesophilic temperature (25-37/degree/C). The model thus constructed fit overall sulfur leaching data well after suitable assumptions had been made for extent of cell attachment; gas (oxygen) transfer rates, sulfur accessibility, and sulfate reprecipitation rates. The resulting equation is useful for process simulation, control and design. Further work is needed to define additional sulfur leaching effects.

• Research Organization: Dept. of Chemical Engineering, Columbus, OH (USA)
• OSTI ID: 5956127
• Report Number(s): CONF-8809269-
• Conference Information: Journal Name: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) Journal Volume: 33:4
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
550700 -- Microbiology
59 BASIC BIOLOGICAL SCIENCES
AQUEOUS SOLUTIONS
BIOCHEMICAL REACTION KINETICS
BIODEGRADATION
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
DECOMPOSITION
DESULFURIZATION
DISPERSIONS
DISSOLUTION
ELEMENTS
ENERGY SOURCES
EQUATIONS
FOSSIL FUELS
FUELS
IRON
IRON COMPOUNDS
IRON SULFIDES
KINETIC EQUATIONS
KINETICS
LEACHING
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
METALS
MICROORGANISMS
MINERALS
MIXTURES
NONMETALS
OXIDATION
OXYGEN
OXYGEN COMPOUNDS
PRECIPITATION
PYRITE
REACTION KINETICS
REMOVAL
SEPARATION PROCESSES
SOLUTIONS
SULFATES
SULFIDE MINERALS
SULFIDES
SULFUR
SULFUR COMPOUNDS
THERMOPHILIC CONDITIONS
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS