Molecular accessibility in solvent swelled coal

Technical Report · Thu Aug 01 00:00:00 EDT 1991

DOI:https://doi.org/10.2172/6025735· OSTI ID:6025735

Kispert, L D

Research continued on the determination of pore size and number distribution changes after swelling the coal samples with various solvents. A paper has just been submitted to the journal Fuel on the Low temperature Swelling of Argonne Premium Coal samples using solvents of varying polarity. The variation in the shape of the pore was followed as a function of temperature and swelling solvent polarity. This change in pore structure was attributed to break-up of the hydrogen bonding network in coal by polar solvents. The modification in pore shape from spherical to cylindrical was attributed to anisotropy in hydrogen bond densities. A copy of this paper has been attached to this report. Wojciech Sady has determine the structural changes in the pores that occur when APCS coal is dehydrated prior to swelling with polar solvents. These changes are different from those that occur in the absence of prior dehydration. He has also completed a study on the variation in the hydrogen bonding character of the pore wall as the coals are swelled with various polar solvents. A statistical analysis of the data is currently underway to determine important trends in his data. 9 refs.

• Research Organization: Alabama Univ., University, AL (United States). Dept. of Chemistry
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-90PC90284
• OSTI ID: 6025735
• Report Number(s): DOE/PC/90284-4; ON: DE92002767
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
SWELLING
DEHYDRATION
ELECTRON SPIN RESONANCE
ENDOR
MICROSTRUCTURE
NUCLEAR MAGNETIC RESONANCE
POROSITY
PROBES
PROGRESS REPORT
PYRIDINE
SOLVENTS
AZINES
CARBONACEOUS MATERIALS
CRYSTAL STRUCTURE
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
MAGNETIC RESONANCE
MATERIALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PYRIDINES
RESONANCE
010600* - Coal
Lignite
& Peat- Properties & Composition