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Title: (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}
}

Technical Report:
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