Chemistry and structure of coal derived asphaltenes and preasphaltenes. Quarterly progress report, January-March 1980
The following conclusions are drawn: (1) the aromaticity of petroleum-derived asphaltene (f/sub a/ = 0.2-0.5) is lower than that of coal-derived asphaltene (f/sub a/ = 0.6-0.7). (2) The aromatic ring systems within petroleum-derived asphaltene are much more ccondensed (peri) (H/sub aru//C/sub ar/ = 0.3-0.5) than that of coal-derived asphaltene (kata)(H/sub aru//C/sub ar/ = 0.5-0.7). (3) The substituents of the petroleum-derived asphaltenes are longer (n = 4-6) than those of coal-derived asphaltenes (n = 1). (4) The aromatic system of petroleum-derived asphaltene is extensively substituted (70 to 80%), whereas the coal-derived asphaltene is sparingly substituted (35 to 45%). (5) The molecular weight of petroleum-derived asphaltene is ca. 10 times higher than that of the coal-derived asphaltene. (6) Petroleum-derived asphaltene is less reactive to physical or chemical agents than that of coal-derived asphaltene. (7) Petroleum-derived asphaltene is more highly associated (Me = 5-7) than that of coal-derived asphaltene (Me-2-4). This will be reflected in the ease of processing. (8) Petroleum-derived asphaltene is less poplar than the coal-derived asphaltene.
- Research Organization:
- University of Southern California, Los Angeles (USA)
- DOE Contract Number:
- EX-76-C-01-2031
- OSTI ID:
- 5622367
- Report Number(s):
- FE-2031-16
- Country of Publication:
- United States
- Language:
- English
Similar Records
Chemistry and structure of coal-derived asphaltenes, Phase III. Quarterly progress report, April--June 1978
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Related Subjects
02 PETROLEUM
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ASPHALTENES
CHEMISTRY
FRACTIONATION
CHROMATOGRAPHY
COAL LIQUEFACTION
COAL LIQUIDS
PETROLEUM
STRUCTURAL CHEMICAL ANALYSIS
STRUCTURAL MODELS
ASPHALTS
BITUMENS
ENERGY SOURCES
FOSSIL FUELS
FUELS
LIQUEFACTION
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
SEPARATION PROCESSES
TAR
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction
010600 - Coal
Lignite
& Peat- Properties & Composition
023000 - Petroleum- Properties & Composition
400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)