Hydrogen bonding in asphaltenes and coal. Final report

Technical Report · Fri Aug 01 04:00:00 EDT 1980

OSTI ID:6129147

Li, N C; Hara, T; Jones, L

The objective of this program is to investigate nature and strength of hydrogen bonding and other molecular interactions that occur in asphaltenes and coal-liquids, and to seek possible correlations with the viscosity of the product oil. The asphaltene components of samples of centrifuged liquid product, CLP, and solvent refined coal, SRC, before and after upgrading are isolated by solvent fractionation. The compositions of the asphaltenes, including their acid/neutral and base components, are obtained by elemental analysis and the molecular weights by vapor pressure osmometry. The magnetic resonance, infrared, and calorimetric methods are used to determine the strength of hydrogen bond and other molecular interactions in the fractions isolated. 600-MHz NMR, IR, GPC, and GC/MS are used in characterization of the coal-liquids. Our results indicate that hydrogen bonding involving largely phenolic OH and nitrogen-containing bases, -OH---N-, gives rise to proton-transfer complexes -O/sup -/---HN/sup +/- and the increased size and concentrations of these ionic complexes, to some extent, are responsible for the increase in viscosity and non-Newtonian flow of the coal liquids.

• Research Organization: Duquesne Univ., Pittsburgh, PA (USA). Dept. of Chemistry
• DOE Contract Number: AS22-76ET10707
• OSTI ID: 6129147
• Report Number(s): DOE/ET/10707-T1; ON: DE82002415
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ASPHALTENES
ASPHALTS
BITUMENS
CHEMICAL BONDS
CHEMICAL REACTIONS
CHROMATOGRAPHY
COAL LIQUIDS
DATA
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
FUELS
GAS CHROMATOGRAPHY
HYDROGEN
HYDROGENATION
INFORMATION
INFRARED SPECTRA
LIQUIDS
MAGNETIC RESONANCE
MASS SPECTROSCOPY
NONMETALS
NUCLEAR MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PROCESSING
REFINING
RESONANCE
SEPARATION PROCESSES
SOLVENT-REFINED COAL
SPECTRA
SPECTROSCOPY
TAR
VISCOSITY