Evaluation of intermolecular attractive forces in coal-derived liquids

Technical Report · Tue Aug 01 04:00:00 EDT 1989

DOI:https://doi.org/10.2172/6798722· OSTI ID:6798722

Jones, M B

The effect of structural features (hence types of intermolecular interactions) on the physical properties of coal-derived preasphaltenes was studied by comparing (1) the solubility of several model compounds of known structure with the dissolvability of preasphaltene samples as a function of solvent parameters and (2) intrinsic viscosities of model compounds of known structure with viscosities of preasphaltene samples. The quantitative dissolvabilities of nine model compounds and nine preasphaltene samples isolated from different liquefaction runs in 12 solvents were measured. The dissolvabilities were correlated with five solvent parameters: Hidebrand solubility parameter ({delta}), net hydrogen-bonding index ({theta}), donor number (DN), donor number minus acceptor number (DN-AN), and donor number divided by acceptor number (DN/AN). The intrinsic viscosities of 66 model compounds and 38 size-separated preasphaltene samples were determined in THF solution. The model compounds were divided into three subsets: (1) models which were primarily hydrocarbon, with dispersion and {pi}--{pi} interactions as the dominant intermolecular forces, (2) models which contained polar groups, such as etheral oxygen and heterocyclic amine, but which exhibited the same general types of interactions as group 1, and (3) models which contained hydrogen-bond donor functionalities. The preasphaltene samples were isolated from different liquefaction runs and were separated into narrow molecular weight fractions by preparative gel permeation chromatography.

• Research Organization: North Dakota Univ., Grand Forks, ND (USA). Dept. of Chemistry
• Sponsoring Organization: DOE/FE
• DOE Contract Number: FG22-83PC60808
• OSTI ID: 6798722
• Report Number(s): DOE/PC/60808-T1; ON: DE90013397
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600 -- Coal
Lignite
& Peat-- Properties & Composition
CHEMICAL BONDS
COAL LIQUIDS
DOCUMENT TYPES
FLUIDS
INTERMOLECULAR FORCES
LIQUIDS
MOLECULAR WEIGHT
ORGANIC COMPOUNDS
PROGRESS REPORT
SOLUBILITY
STRUCTURAL MODELS
TEMPERATURE EFFECTS
VISCOSITY