Hydrogen bonding in asphaltenes and coal. Progress report, March 1, 1977--August 31, 1977

Technical Report · Mon Aug 01 00:00:00 EDT 1977

DOI:https://doi.org/10.2172/5152631· OSTI ID:5152631

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

A calorimetric method is presented for the simultaneous evaluation of equilibrium constant, K, and molar enthalpy, ..delta..H/sup 0/, for 1 : 1 adduct formation of quinoline (Qu) with asphaltene (A), together with its acid/neutral (AA) fraction and its base (BA) fraction, isolated from a centrifuged liquid product (CLP) sample prepared from Kentucky hvAb coal at 27.6 MPa hydrogen pressure and 723K, with reactor charged with glass pellets. The same procedure was used to determine K and ..delta..H/sup 0/ for 1 : 1 adduct formation of Qu with asphaltene and heavy oils obtained from CLP samples (FB-53) prepared with CoMo catalyst at different run times and process conditions. The effects of the CoMo catalyst, run time, and residence times on viscosity, molecular weight, ..delta..H/sup 0/, heteratom content, contents of preasphaltene, asphaltene and heavy oil, aromaticity, and structural parameters, are determined. These findings lead to the conclusion that hydrogen bonding plays an important role in determining viscosity, and contributes more to the enthalpy of interaction than does ..pi..-interaction. The toluene-insoluble fraction, asphaltene (whole, acid/neutral and base fractions), and heavy oil were isolated from a solvent-refined-coal (SRC) conversion product. Data obtained from several infrared and viscosity experiments indicate that the behavior of different fractions isolated from SRC is similar to that of corresponding fractions isolated from CLP samples.

• Research Organization: Duquesne Univ., Pittsburgh, Pa. (USA)
• DOE Contract Number: EY-76-S-02-0063
• OSTI ID: 5152631
• Report Number(s): COO-0063-5
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ASPHALTENES
CHEMICAL BONDS
CHEMICAL COMPOSITION
COAL
ADDUCTS
CALORIMETRY
CATALYSTS
COBALT
ENTHALPY
EQUILIBRIUM
FRACTIONATION
HYDROGEN
INFRARED SPECTRA
MOLYBDENUM
QUINOLINES
SOLVENT-REFINED COAL
THERMODYNAMIC PROPERTIES
VISCOSITY
ASPHALTS
AZINES
BITUMENS
CARBONACEOUS MATERIALS
CRYOGENIC FLUIDS
ELEMENTS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
METALS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
PYRIDINES
REFRACTORY METALS
SEPARATION PROCESSES
SPECTRA
TAR
TRANSITION ELEMENTS
010600* - Coal
Lignite
& Peat- Properties & Composition