(Determination of the surface reactivity of coal powders). Second quarterly report, December 1, 1982-February 28, 1983
Abstract
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.
- Authors:
- Publication Date:
- Research Org.:
- Lehigh Univ., Bethlehem, PA (USA). Dept. of Chemistry
- OSTI Identifier:
- 6181553
- Report Number(s):
- DOE/PC/50809-T7
ON: DE85004215
- DOE Contract Number:
- FG22-82PC50809
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 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
Citation Formats
Fowkes, F M. (Determination of the surface reactivity of coal powders). Second quarterly report, December 1, 1982-February 28, 1983. United States: N. p., 1983.
Web.
Fowkes, F M. (Determination of the surface reactivity of coal powders). Second quarterly report, December 1, 1982-February 28, 1983. United States.
Fowkes, F M. 1983.
"(Determination of the surface reactivity of coal powders). Second quarterly report, December 1, 1982-February 28, 1983". United States.
@article{osti_6181553,
title = {(Determination of the surface reactivity of coal powders). Second quarterly report, December 1, 1982-February 28, 1983},
author = {Fowkes, F M},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6181553},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri May 13 00:00:00 EDT 1983},
month = {Fri May 13 00:00:00 EDT 1983}
}