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

Journal Article · Thu Feb 01 00:00:00 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), Vol. 51:2
• Country of Publication: United States
• Language: English

Related Subjects

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