The characterization of eight maceral concentrates by means of Curie point pyrolysis-gas chromatography and Curie point pyrolysis-gas chromatography-mass spectrometry
- Delft Univ. of Technology (Netherlands)
In order to study the relationships between the chemical structures of coals, coal macerals and their precursors (plant tissues), eight coal macerals originating from the Yorkshire coal basin (U.K.) were studied by Curie point pyrolysis-gas chromatography and Curie point pyrolysis-gas chromatography-mass spectrometry. The samples were selected on the basis of a previous study of a large set of macerals. The macerals were studied in order to relate structural moieties of the macerals, as reflected by their pyrolysis products, to structural elements of their likely precursors, plant tissues. The maceral pyrolysates mainly consist of alkylbenzenes, alkylnapthalenes, alkylphenols and series of straight-chain alk-1-enes and alkanes over a wide molecular weight range. Multivariate data treatment by means of factor analysis was chosen to compare the pyrolysis data--represented by these histograms--with the petrographic data and the proximate and ultimate analysis values of the macerals. In addition, similar analyses was performed on the macerals using such a low Curie temperature (358{degree}C), that from some of the macerals thermal extracts were obtained, containing a series of n-alkanes and some isoprenoids such as pristane and phytane. Although these thermal extracts represent only a low percentage by weight of the maceral samples, their existence probably will affect both the chemical and physical properties of the macerals, although they are in fact no part of the coal structure itself.
- OSTI ID:
- 5279641
- Journal Information:
- Geochimica et Cosmochimica Acta; (USA), Journal Name: Geochimica et Cosmochimica Acta; (USA) Vol. 52:3; ISSN GCACA; ISSN 0016-7037
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010600* -- Coal
Lignite
& Peat-- Properties & Composition
58 GEOSCIENCES
580000 -- Geosciences
AROMATICS
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL PROPERTIES
CHEMISTRY
CHROMATOGRAPHY
COAL
COAL DEPOSITS
CURIE POINT
ENERGY SOURCES
EUROPE
FOSSIL FUELS
FUELS
GAS CHROMATOGRAPHY
GEOCHEMISTRY
GEOLOGIC DEPOSITS
MACERALS
MASS SPECTROSCOPY
MATERIALS
MINERAL RESOURCES
ORGANIC COMPOUNDS
PETROGRAPHY
PHYSICAL PROPERTIES
PYROLYSIS PRODUCTS
RESOURCES
SEPARATION PROCESSES
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
UNITED KINGDOM
WESTERN EUROPE