Chemistry and structure of coal derived asphaltenes and preasphaltenes. Interim report

Technical Report · Mon Jan 01 04:00:00 EST 1979

DOI:https://doi.org/10.2172/5721538· OSTI ID:5721538

Yen, T. F.

It is the objective of this project to isolate the asphaltene and preasphaltene fractions from coal liquids from a number of liquefaction processes. These processes consist of in general: catalytic hydrogenation, staged pyrolysis and solvent refining. The asphaltene fractions may be further separated by both gradient elution through column chromatography, and molecular size distribution through gel permeation chromatography. These coal-derived asphaltene and preashpaltene fractions will then be investigated by various chemical and physical methods for characterization of their structures. After the parameters are obtained, these parameters will be correlated with the refining and conversion variables which control a given type of liquefaction process. The effects of asphaltene in catalysis, ash or metal removal, desulfurization and denitrification will also be correlated. It is anticipated that understanding the role of asphaltenes in liquefaction processes will enable engineers to both improve existing processes, and to make recommendations for operational changes in planned liquefaction units. The objective of Phase 1 was to complete the isolation and separation of coal liquid fractions and to initiate their characterization. The objective of Phase 2 is to continue the characterization of coal asphaltenes and other coal liquid fractions by use of physical and instrumental methods. The structural parameters obtained will be used to postulate hypothetical average structures for coal liquid fractions.The objective of Phase 3 is to concentrate on the characterization of the preasphaltene (benzene insoluble fraction) of coal liquid fraction by the available physical and chemical methods to obtain a number of structural parameters.

• Research Organization: University of Southern California, Los Angeles (USA)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• OSTI ID: 5721538
• Report Number(s): FE-2031-14
• 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
ASPHALTENES
ASPHALTS
BITUMENS
CARBENES
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL PROPERTIES
CHEMICAL REACTIONS
CHEMISTRY
CHROMATOGRAPHY
COAL LIQUEFACTION
COAL LIQUIDS
COHERENT SCATTERING
DIFFRACTION
ELECTRON SPIN RESONANCE
EXTRACTION
FRACTIONATION
GRAVIMETRIC ANALYSIS
H-COAL PROCESS
INFRARED SPECTRA
LIQUEFACTION
MAGNETIC RESONANCE
MASS SPECTROSCOPY
MOLECULAR WEIGHT
NUCLEAR MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
OXIDATION
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
POLAROGRAPHY
POLYMERS
QUANTITATIVE CHEMICAL ANALYSIS
RADICALS
RESINS
RESONANCE
SCATTERING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTRA
SPECTROSCOPY
SRC PROCESS
STRUCTURAL CHEMICAL ANALYSIS
SYNTHOIL PROCESS
TAR
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
THERMOCHEMICAL PROCESSES
X-RAY DIFFRACTION