Physical and chemical behavior of liquefied coal in solids separation. Annual report for the year ending September 30, 1977. [53 references]

Technical Report · Sat Oct 01 04:00:00 EDT 1977

DOI:https://doi.org/10.2172/6674818· OSTI ID:6674818

Briggs, D. E.; Addington, D. V.; Berry, Jr., C. E.

Four bis-(hydroxyphenyl)alkanes and four ..cap alpha..,..omega..-dipyridyl or diquinolyl-alkanes were synthesized, purified, and examined by proton NMR. The compounds are believed to possess characteristics of asphaltenes. Solvent-extracted asphaltenes from an H-coal liquefaction of an Illinois No. 6 Coal were fractioned and characterized by molecular weight, elemental and proton NMR analyses. Oxygen and metals levels were determined by neutron activation. Filtration data were taken at 232/sup 0/C (450/sup 0/F) at different concentrations of oils, resins, asphaltenes, and preasphaltenes with 13.8 wt % THF insoluble solids. Electrophoresis experiments with asphaltene and preasphaltene fractions gave deposition on both electrodes, being largest on the positive electrode with pyridine, THF, and m-cresol and on the negative electrode with benzene and tetralin as solvents. Adsorption characteristics of GPC fractionated asphaltenes were examined. The analysis included the effects of concentration, temperature, solvent and solid adsorbent. Micelle formation was apparent with the higher molecular weight asphaltene fractions. Adsorption experiments on two and three ring aromatic compounds were conducted to assess the adsorption tendency of various functional groups. Streaming potential measurements were made for the flow of asphaltene solutions through fixed beds of solids to assess the effects of concentration, temperature, solvent, and solid adsorbent. There is consistency in the electrophoresis, adsorption and streaming potential data.

• Research Organization: Michigan Univ., Ann Arbor (USA)
• OSTI ID: 6674818
• Report Number(s): FE-2550-4
• 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
ACTIVATION ANALYSIS
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ASPHALTENES
ASPHALTS
BITUMENS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COAL LIQUEFACTION
COAL LIQUIDS
CRYOGENIC FLUIDS
ELECTROPHORESIS
ELEMENTS
EXTRACTION
FILTRATION
FLUIDS
FRACTIONATION
GAS CHROMATOGRAPHY
H-COAL PROCESS
HETEROCYCLIC COMPOUNDS
INFRARED SPECTRA
LIQUEFACTION
MAGNETIC RESONANCE
MICELLAR SYSTEMS
MINERALS
NONMETALS
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
RESONANCE
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SOLVENT EXTRACTION
SORPTION
SORPTIVE PROPERTIES
SPECTRA
STRUCTURAL MODELS
SURFACE PROPERTIES
SURFACE TENSION
SYNTHOIL PROCESS
TAR
THERMOCHEMICAL PROCESSES
VISCOSITY