An investigation of the chemistry of the pore structure of coal in the presence of a swelling solvent using a novel EPR technique

Conference · Mon Dec 31 23:00:00 EST 1990

OSTI ID:5453563

Spears, D R; Sady, W; Kispert, L D

To study the hydrogen bonding ability of functional groups in pores of Argonne Premium Coal Samples (APCS) exposed during swelling, small nitroxide spin probes with reactive R groups -H, -OH, -CO{sub 2}H, and -NH{sub 2} differing in polarity were diffused into APCS coals during swelling and the concentration of the trapped probes measured by an EPR method. As the hydrogen bonding ability of R increases, the degree of probe retention increases; however, probe retention decreases with rank. Polar solvents like pyridine interact specifically with polar functional groups on the micropore wall and prevent binding with polar guest molecules. 17 refs., 5 figs., 1 tab.

• Research Organization: Alabama Univ., University, AL (United States). Dept. of Chemistry
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-90PC90284
• OSTI ID: 5453563
• Report Number(s): CONF-910812-9; ON: DE91016598
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
AZINES
CARBONACEOUS MATERIALS
CHEMICAL BONDS
COAL
COAL RANK
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
MATERIALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
POROSITY
PROBES
PYRIDINE
PYRIDINES
SWELLING