Effect of moisture on the diffusion of organic molecules in coal

Conference · Fri Jan 01 04:00:00 EST 1988 · Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States)

OSTI ID:5870922

Otake, Y; Suuberg, E M

The results of the present study confirm the importance of establishing and reporting carefully the moisture content of any coal that is the subject of diffusion rate and/or swelling rate measurements. Likewise, it is important to report carefully how a sample may have been dried, prior to these measurements, since such low temperature procedures also may influence the results. It may be concluded from the present work that moisture will swell coals of bituminous, subbituminous, and lignite ranks. This swelling will permit faster penetration and swelling of the coal structure by organic liquid diffusants. The activation energies observed for such swelling processes are reduced, as the effective glass transition temperature of the coals are increased, either by drying or pyrolysis.

• Research Organization: Brown Univ., Providence, RI (USA)
• DOE Contract Number: FG22-85PC80527; AC21-84FC10617
• OSTI ID: 5870922
• Report Number(s): CONF-8809228-
• Conference Information: Journal Name: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) Journal Volume: 33:4
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ACTIVATION ENERGY
AZINES
BITUMINOUS COAL
BLACK COAL
BROWN COAL
CARBONACEOUS MATERIALS
COAL
CORRELATIONS
DIFFUSION
DRYING
ENERGY
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
LIGNITE
MATERIALS
MOISTURE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PARTICLE SIZE
PYRIDINE
PYRIDINES
SIZE
SUBBITUMINOUS COAL
SWELLING
TIME DEPENDENCE
WATER