Physical and chemical behavior of liquefied coal in solids separation. Quarterly report, October--December 1977

Technical Report · Sun Jan 01 04:00:00 EST 1978

DOI:https://doi.org/10.2172/6916315· OSTI ID:6916315

Briggs, D. E.; Addington, D. V.; Cameron, J. R.

Work on the synthesis and proton NMR analysis of representative groups of bis-phenols, tris-phenols and tetrakis-phenols was essentially completed. A bis-pyridyl compound was synthesized. A study on the oxidative degradation of asphaltene was begun. The cake compressibility of THF-insoluble residue from H-Coal vacuum bottoms at 232/sup 0/C (450/sup 0/F) was 0.75 compared to a value of 0.36 at 176.7/sup 0/C (350/sup 0/F). The increase in compressibility results from softening of residual organic matter. The solubility of asphaltenes in THF alone and in combination with decalin, pentane and tetralin was measured. The asphaltene adsorption characteristics of the filter media effects the amount of precipitate collected. Under scanning electron microscope examination the precipitate appears as clusters of 0.2-0.5 ..mu..m particles. Asphaltenes were separated by perchloric acid treatment into basic and acidic-neutral fractions. Equilibrium adsorption isotherms of the fractions in tetralin, pyridine, and m-cresol measured with an alumina adsorbent were surprisingly similar. The effect of temperature, asphaltene concentration, solvent and liquefied coal fraction on the zeta-potential in the presence of THF-insoluble coal liquefaction residue was measured.

• Research Organization: Michigan Univ., Ann Arbor (USA)
• OSTI ID: 6916315
• Report Number(s): FE-2550-5
• 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
ADSORPTION
ASPHALTENES
ASPHALTS
BITUMENS
CHEMICAL REACTIONS
COAL LIQUEFACTION
COAL LIQUIDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FILTRATION
H-COAL PROCESS
HETEROCYCLIC COMPOUNDS
LIQUEFACTION
MAGNETIC RESONANCE
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SOLVENTS
OTHER ORGANIC COMPOUNDS
OXIDATION
PHYSICAL PROPERTIES
RESIDUES
RESONANCE
RHEOLOGY
SEPARATION PROCESSES
SOLUBILITY
SOLVENTS
SORPTION
STRUCTURAL MODELS
SURFACE PROPERTIES
SURFACE TENSION
SYNTHESIS
TAR
THERMOCHEMICAL PROCESSES
VISCOSITY