A new approach in ultrapurification of coal by selective flocculation

Technical Report · Thu Mar 01 04:00:00 EST 1990

DOI:https://doi.org/10.2172/6937410· OSTI ID:6937410

Moudgil, B M

The mathematical and computational model developed for predicting optimum selectivity achievable with a polymer has been successfully verified experimentally. Adsorption density of polymer SF 362 on coal and coal pyrite was measured using the depletion method. Values of {Upsilon}{sub R} (active sites ratio) and {Theta} (fractional surface coverage) were computed using the adsorption data. The mathematical model predicted a low selectivity in separating coal pyrite from coal which was also verified by selective flocculation tests. FTIR surface area and size distribution analysis indicated that mineral matter associated with both coal and coal pyrite samples can adversely affect the performance of the polymer in the selective flocculation process. Adsorption tests are in progress to identify experimental conditions (dispersant, pH, flocculent) yielding a higher value of {Upsilon}{sub R} so that the desired separation of coal pyrite from coal can be obtained. 2 refs., 8 figs., 3 tabs.

• Research Organization: Florida Univ., Gainesville, FL (USA). Mineral Resources Research Center
• Sponsoring Organization: DOE/FE
• DOE Contract Number: FG22-88PC88917
• OSTI ID: 6937410
• Report Number(s): DOE/PC/88917-T4; ON: DE90011036
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
ADSORPTION
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
DOCUMENT TYPES
ENERGY SOURCES
FLOCCULATION
FOSSIL FUELS
FUELS
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
MATHEMATICAL MODELS
MINERALS
POLYMERS
PRECIPITATION
PROGRESS REPORT
PYRITE
SEPARATION PROCESSES
SORPTION
SPECTRA
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SURFACE AREA
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS