Improving the stability of coal slurries: Quarterly progress report for the period Sep. 15, 1986-Dec. 15, 1986. [Adsorption of gum tragacanth on coal particles]

Technical Report · Wed Jan 01 00:00:00 EST 1986

OSTI ID:7055499

Fogler, H S

The last quarterly progress report focused on the adsorption study of the polystyrene latex spheres with gum tragacanth (GT), and the adsorption mechanism was found to be hydrophobic rather than electrostatic. Also, the effect of the amount of GT adsorbed, the bulk concentration of GT, incubation time and pH on the stability factor was examined, and the results indicated that the conformation of GT on the surface of latex spheres plays an important role in the stabilization. This report presents the results of the coal-water slurries, mainly focusing on the adsorption study of GT by changing pH and ionic strength. It was found from the experiment in which the ionic strength was changed that the adsorption of GT on the coal particles is hindered by the coulombic repulsion between GT and coal. In addition, the experiment in which pH was changed also indicated that the adsorption mechanism is electrostatic in nature. 7 refs., 2 figs.

• Research Organization: Michigan Univ., Ann Arbor (USA). Dept. of Chemical Engineering
• DOE Contract Number: FG22-85PC80517
• OSTI ID: 7055499
• Report Number(s): DOE/PC/80517-T5; ON: DE87003390
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL FINES
ADDITIVES
SORPTIVE PROPERTIES
STABILITY
COLLOIDS
ADSORPTION
ELECTROSTATICS
EXPERIMENTAL DATA
FUEL SLURRIES
MIXTURES
PH VALUE
RESEARCH PROGRAMS
SODIUM CHLORIDES
WATER
ALKALI METAL COMPOUNDS
CHLORIDES
CHLORINE COMPOUNDS
DATA
DISPERSIONS
FUELS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INFORMATION
NUMERICAL DATA
OXYGEN COMPOUNDS
SLURRIES
SODIUM COMPOUNDS
SORPTION
SURFACE PROPERTIES
SUSPENSIONS
010600* - Coal
Lignite
& Peat- Properties & Composition