Kinetic study of microbial coal desulfurization using thermophilic microorganisms
Thesis/Dissertation
·
OSTI ID:6448378
Microbial coal desulfurization was investigated using a thermophilic microorganism Sulfolobus acidocaldarius. The rate of ferrous iron oxidation by the microbes was studied. Microbial leaching of iron pyrite from coal was investigated and a kinetic model was proposed. The effects of basal salts, pyrite grain size, prior washing of coal and initial cell density on sulfur removal was experimentally determined. Experimental results showed that both chemical and microbial oxidation of pyritic sulfur were significant. A single dose of basal salts, high cell density (10Y cells/ml) and fine pyrite grain size (100% 10 m) gave 2 to 3 times higher sulfur leaching rates. Cell attachment to coal and other particles was investigated to define the phenomenon of cell-particle interaction. Microbial cells attached to the coal surface at high rates where equilibrium was reached in 5 min and the adsorption isotherms fitted the Langmuir Model in some cases. A kinetic model which assumed a first order rate equation for chemical oxidation of pyrite and the Monod Model for biological oxidation of pyrite along with cell adsorption was proposed to fit the experimental data.
- Research Organization:
- Ohio State Univ., Columbus (USA)
- OSTI ID:
- 6448378
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
550700 -- Microbiology
59 BASIC BIOLOGICAL SCIENCES
ADSORPTION ISOTHERMS
BACTERIA
BIOCHEMICAL REACTION KINETICS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
DESULFURIZATION
DISSOLUTION
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON COMPOUNDS
IRON SULFIDES
ISOTHERMS
KINETICS
LEACHING
MATERIALS
MATHEMATICAL MODELS
MICROORGANISMS
MINERALS
OXIDATION
PARTICLE SIZE
PYRITE
REACTION KINETICS
REMOVAL
SEPARATION PROCESSES
SIZE
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SULFUR-OXIDIZING BACTERIA
THERMOPHILIC CONDITIONS
TRANSITION ELEMENT COMPOUNDS
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
550700 -- Microbiology
59 BASIC BIOLOGICAL SCIENCES
ADSORPTION ISOTHERMS
BACTERIA
BIOCHEMICAL REACTION KINETICS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
DESULFURIZATION
DISSOLUTION
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON COMPOUNDS
IRON SULFIDES
ISOTHERMS
KINETICS
LEACHING
MATERIALS
MATHEMATICAL MODELS
MICROORGANISMS
MINERALS
OXIDATION
PARTICLE SIZE
PYRITE
REACTION KINETICS
REMOVAL
SEPARATION PROCESSES
SIZE
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SULFUR-OXIDIZING BACTERIA
THERMOPHILIC CONDITIONS
TRANSITION ELEMENT COMPOUNDS