(Determination of the surface reactivity of coal powders). Second quarterly report, December 1, 1982-February 28, 1983

Technical Report · Fri May 13 00:00:00 EDT 1983

OSTI ID:6181553

Fowkes, F M

Electrophoresis of coal powders was initiated in Freon 113, then in Freon 113 containing 0.2 to 1% of pyridine to determine coal surface acidity and basicity. Adsorbed pyridine accepts hydrogen ions from surface acids and upon desorption carries positive charges into solution, thus generating negative zeta-potentials on coal particles. No negative potentials developed with low-ash bituminous coal. However with low-ash anthracite (PSOC-870) negative potentials were always observed when pyridine was present. The negative zeta-potentials show that PSOC-870 coal particles have appreciable surface acidity. The positive potentials observed with Freon 113 indicate that surface basic sites have donated electrons to the rather electropositive carbons of Freon.

• Research Organization: Lehigh Univ., Bethlehem, PA (USA). Dept. of Chemistry
• DOE Contract Number: FG22-82PC50809
• OSTI ID: 6181553
• Report Number(s): DOE/PC/50809-T7; ON: DE85004215
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ANTHRACITE
ASH CONTENT
ELECTROPHORESIS
BITUMINOUS COAL
COAL FINES
EXPERIMENTAL DATA
FREONS
PYRIDINE
RESEARCH PROGRAMS
AZINES
BLACK COAL
CARBONACEOUS MATERIALS
COAL
DATA
ENERGY SOURCES
FOSSIL FUELS
FUELS
HALOGENATED ALIPHATIC HYDROCARBONS
HETEROCYCLIC COMPOUNDS
INFORMATION
MATERIALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PYRIDINES
010600* - Coal
Lignite
& Peat- Properties & Composition