Evaluation of intermolecular attractive forces in coal derived liquids. Quarterly report, May 1984-July 1984
Technical Report
·
OSTI ID:6169868
To gain potential information concerning the difference between diethyl ether and THF as solvents for aromatic model compounds and coal derived preasphaltenes, NMR spectra of cyclohexane solutions of each solvent, both in the absence and presence of naphthalene, were obtained. Both solvents evinced similar upfield shifts in chemical shift in the presence of naphthalene, as designed, was not able to explain why THF is such a better solvent for aromatics than diethyl ether. Nine fresh preasphaltene (PA) samples were isolated via solvent fractionation from products of coal liquefaction experiments carried out at the University of North Dakota Energy Research Center. Quantitative dissolvabilities of these PA samples in twelve solvents were determined. Correlation of PA dissolvability with Hildebrand solubility parameter, net hydrogen bonding index, or donor number (DN) minus acceptor number (AN) values of solvents reveals general trends; however, none of these solvent parameters are adequate predictors of individual solvent behavior. A better predictor is DN/AN, which in addition to being useful for PA dissolvability, may also be employed to forecast effectiveness of a solvent for extraction or swelling of coal. 13 figures, 4 tables.
- Research Organization:
- North Dakota Univ., Grand Forks (USA)
- DOE Contract Number:
- FG22-83PC60808
- OSTI ID:
- 6169868
- Report Number(s):
- DOE/PC/60808-3; ON: DE85003597
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600 -- Coal
Lignite
& Peat-- Properties & Composition
ALKANES
AROMATICS
CARBONACEOUS MATERIALS
COAL
COAL LIQUEFACTION
COAL LIQUIDS
CONDENSED AROMATICS
CYCLOALKANES
CYCLOHEXANE
ENERGY SOURCES
ETHERS
EXTRACTION
FLUIDS
FOSSIL FUELS
FUELS
FURANS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
INTERMOLECULAR FORCES
LIQUEFACTION
LIQUIDS
MAGNETIC RESONANCE
MATERIALS
NAPHTHALENE
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SOLVENTS
RESONANCE
SEPARATION PROCESSES
SOLUBILITY
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SOLVENTS
STRUCTURAL MODELS
SWELLING
TETRAHYDROFURAN
THERMOCHEMICAL PROCESSES
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600 -- Coal
Lignite
& Peat-- Properties & Composition
ALKANES
AROMATICS
CARBONACEOUS MATERIALS
COAL
COAL LIQUEFACTION
COAL LIQUIDS
CONDENSED AROMATICS
CYCLOALKANES
CYCLOHEXANE
ENERGY SOURCES
ETHERS
EXTRACTION
FLUIDS
FOSSIL FUELS
FUELS
FURANS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
INTERMOLECULAR FORCES
LIQUEFACTION
LIQUIDS
MAGNETIC RESONANCE
MATERIALS
NAPHTHALENE
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SOLVENTS
RESONANCE
SEPARATION PROCESSES
SOLUBILITY
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SOLVENTS
STRUCTURAL MODELS
SWELLING
TETRAHYDROFURAN
THERMOCHEMICAL PROCESSES