Microbial treatment of coals and its effect on ash fusion properties

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

OSTI ID:5969904

Krishna, C R; Francis, A J

One objective of this study was to characterize the microbial demetalization and desulfurization of coal by the bacterium Thiobacillus ferrooxidans under aerobic conditions. The effects of type of coal, coal particle size, and nutrient concentration on the bacterial leaching of coal were investigated. Ash fusion temperatures of treated and untreated coal samples were measured and an attempt was made to relate variations to the coal and ash properties. Another objective was to determine the extent of dissolution of different metals from coal residues by the action of native autotrophic bacteria under aerobic conditions. The effects of inorganic nutrient supplements were also studied. It was concluded that microbial action on bituminous coals under aerobic conditions can lead to significant reductions in inorganic sulfur, metals and total ash content, as well as considerable increase of ash fusion temperatures of the remaining ash.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• OSTI ID: 5969904
• 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
AEROBIC CONDITIONS
ARSENIC
ASH CONTENT
ASHES
BACILLUS
BACTERIA
BENCH-SCALE EXPERIMENTS
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHROMIUM
CLEANING
COAL
COPPER
DEASHING
DEMETALLIZATION
DESULFURIZATION
DISSOLUTION
EFFICIENCY
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON
LEAD
MANGANESE
MATERIALS
METALS
MICROORGANISMS
NICKEL
PARTICLE SIZE
PERFORMANCE TESTING
PHYSICAL PROPERTIES
REMOVAL
RESIDUES
SEMIMETALS
SEPARATION PROCESSES
SIZE
SULFUR COMPOUNDS
SULFUR-OXIDIZING BACTERIA
TESTING
THERMODYNAMIC PROPERTIES
THIOBACILLUS FERROXIDANS
TRANSITION ELEMENTS
ZINC