Asphaltenes and preasphaltenes: components of an original hvb bituminous coal. [Book chapter]

Conference · Sun Jan 01 04:00:00 EST 1978 · ACS Symp. Ser.; (United States)

OSTI ID:6365202

Marzec, A; Bodzek, D; Krzyzanowska, T

Asphaltenes and preasphaltenes are components of the original coal. Therefore some amount of these group components in coal liquefaction products is not the product of thermal or catalytic conversion. The real content of asphaltenes and preasphaltenes in an original coal is still an unsolved problem. We have to know more about electron-donor and -acceptor properties of solvents as well as about the strength of electron donor-acceptor bonds occurring in coals in order to select a solvent capable of extracting the total amount of these components from any original coal. The functional groups detected in the preasphaltenes and asphaltenes (TLC and HR MS data) occurring in the original coal, have proton-donor and electron-acceptor characteristics (OH-phenol, NH-pyrrol type) and electron-donor characteristics (oxygen compounds, =N-pyridine type, possibly amines). Therefore, hydrogen bonds as well as electron donor-acceptor bonds should be considered to be responsible for binding together the extractable heterocompounds and the cross-linked macromolecules that form three-dimensional network of an original coal. The molecular weights of the bulk of the extractable compounds are in the 187 to 500 amu range.

• Research Organization: Polish Academy of Sciences, Gliwice, Poland
• OSTI ID: 6365202
• Report Number(s): CONF-770814-P4
• Conference Information: Journal Name: ACS Symp. Ser.; (United States) Journal Volume: 71
• 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
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHROMATOGRAPHY
COAL
COAL EXTRACTS
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FRACTIONATION
FUELS
MASS SPECTROSCOPY
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
OTHER ORGANIC COMPOUNDS
PYROLYSIS
SEPARATION PROCESSES
SOLVENTS
SPECTROSCOPY
STRUCTURAL MODELS
TAR
THERMOCHEMICAL PROCESSES
THIN-LAYER CHROMATOGRAPHY