A comparison of the acoustic mobility and the electrophoretic mobility of coal dispersions
Aqueous coal dispersions play a major role from mining to the utilization of coal. The properties of these dispersions, such as stability towards aggregation, rheology, etc., are controlled by two major factors, namely, the particle size and interfacial chemistry. The interfacial chemistry is controlled by the interactions of the coal surface with the aqueous phase. Coal surface-aqueous phase interactions are controlled by rank, mineral content, surface functional groups, pore structure, adsorption, pH, ionic strength, etc. These interactions can be probed using electrokinetic techniques. The authors describe a new electrokinetic technique that utilizes ultrasonics and preliminary data on the application of this technique to coal dispersions. The advantage of ultrasonics are virtually any particle size can be used from ions to aggregates, any concentration of the dispersed phase can be used from the ppm range to volume filling networks, and samples can be optically opaque.
- Research Organization:
- Pen Kem, Inc., Bedford Hills, NY 10507
- OSTI ID:
- 6342719
- Report Number(s):
- CONF-870410-
- Journal Information:
- Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States), Vol. 32:1; Conference: 193. national meeting of the American Chemical Society, Denver, CO, USA, 5 Apr 1987
- Country of Publication:
- United States
- Language:
- English
Similar Records
Coal electrokinetics: The origin of charge at coal/water interface
The rheology of oxide dispersions and the role of concentrated electrolyte solutions
Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COAL
ELECTROPHORESIS
FUEL SLURRIES
ADSORPTION
AGGLOMERATION
AQUEOUS SOLUTIONS
COAL MINING
COAL RANK
IONIC COMPOSITION
MINERALOGY
OPACITY
PARTICLE SIZE
PH VALUE
POROSITY
QUANTITY RATIO
RHEOLOGY
SORPTIVE PROPERTIES
STABILITY
ULTRASONIC WAVES
CARBONACEOUS MATERIALS
DISPERSIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
MATERIALS
MINING
MIXTURES
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
SIZE
SLURRIES
SOLUTIONS
SORPTION
SOUND WAVES
SURFACE PROPERTIES
SUSPENSIONS
010600* - Coal
Lignite
& Peat- Properties & Composition
400400 - Electrochemistry