Hydrogen bonding in asphaltenes and coal

Technical Report · Sat Apr 01 04:00:00 EST 1978

DOI:https://doi.org/10.2172/6559171· OSTI ID:6559171

Li, N. C.; Tewari, K. C.

The objective of this program is to investigate and to determine the nature of hydrogen bonding and other molecular interactions that occur in asphaltene and coal liquids, and to seek possible correlations between the interactions and the viscosity. The asphaltene components of samples of centrifuged liquid product, CLP, and solvent-refined coal, SRC, supplied by the Pittsburgh Energy Research Center, are isolated by solvent fractionation. The compositions of the asphaltenes are obtained by elemental analysis and the molecular weights by vapor pressure osmometry. The acid/neutral and base components of the asphaltenes are separated and again elemental analysis and molecular weights are obtained. The magnetic resonance, infrared and calorimetric methods are used to determine the strength of hydrogen-bond and other molecular interactions in the fractions isolated. Investigations on the toluene-insoluble and heavy-oil fractions are also carried out. In addition, extensive proton magnetic resonance, near infrared and calorimetric studies are carried out for o-phenylphenol and quinoline, which serve as model compounds for the aromatic phenols and the heteronuclear aromatic base nitrogens, respectively, found in coal liquefaction products. This is the final report, giving a summary of activities under the Contract for the entire period.

• Research Organization: Duquesne Univ., Pittsburgh, PA (USA). Dept. of Chemistry
• OSTI ID: 6559171
• Report Number(s): COO-0063-8
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
AROMATICS
ASPHALTENES
ASPHALTS
AZINES
BITUMENS
CARBONACEOUS MATERIALS
CHEMICAL BONDS
CHEMICAL COMPOSITION
COAL
COAL LIQUIDS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
INFRARED SPECTRA
MAGNETIC RESONANCE
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PHENOLS
PYRIDINES
QUINOLINES
RESONANCE
SOLVENT-REFINED COAL
SPECTRA
STRUCTURAL MODELS
TAR