Viscosity, calorimetric, and proton magnetic resonance studies on coal liquid fractions in solution

Journal Article · Thu Feb 01 04:00:00 EST 1979 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac50038a007· OSTI ID:6414997

Tewari, K C; Kan, N; Susco, D M; Li, N C

Two coal liquid products derived from the same Kentucky hvAb coal have been separated into toluene-insoluble, asphaltene, and pentane-soluble heavy oil fractions. Viscosity and calorimetric studies are reported of the interaction between heavy oil and asphaltene (A) and its acid/neutral (AA) and base (BA) components in solvent benzene. The increase in viscosity and molar enthalpy of interaction, ..delta..H/sup 0/, in the order BA > A > AA, correlates well with the proton magnetic resonance downfield chemical shift of the OH signal of o-phenylphenol, as a function of added asphaltene (A, AA, BA) concentration in solvent CS/sub 2/. The results suggest that when asphaltene and heavy oil are present together, hydrogen-bonding involving largely phenolic OH, is one of the mechanisms by which asphaltene-heavy oil interactions are achieved and, in part, is responsible for the viscosity increase of coal liquids. 4 figures, 3 tables.

• Research Organization: Duquesne Univ., Pittsburgh, PA
• OSTI ID: 6414997
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 51:2; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ALKANES
AROMATICS
ASPHALTENES
ASPHALTS
BENZENE
BITUMENS
CALORIMETRY
CARBON COMPOUNDS
CARBON SULFIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL LIQUIDS
ENTHALPY
FRACTIONATION
FUEL OILS
FUELS
HYDROCARBONS
HYDROXY COMPOUNDS
INFRARED SPECTRA
KENTUCKY
KINETICS
MAGNETIC RESONANCE
MOLECULAR WEIGHT
NORTH AMERICA
OILS
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
OTHER ORGANIC COMPOUNDS
PENTANE
PETROLEUM PRODUCTS
PHENOLS
PHYSICAL PROPERTIES
POLYPHENOLS
QUANTITY RATIO
REACTION KINETICS
RESONANCE
SEPARATION PROCESSES
SOLVENTS
SOUTHEAST REGION
SPECTRA
SPECTRAL SHIFT
SULFIDES
SULFUR COMPOUNDS
TAR
THERMODYNAMIC PROPERTIES
TOLUENE
USA
VISCOSITY