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A procedure for the extraction, separation and characterization of coal bitumen is described. A Carboniferous coal was subjected to exhaustive (single-step) extraction with dimethylacetamide (DMAA) at ambient temperature. The treatment solubilized 24 wt% of the organic matter. The bitumen was fractionated further and some fractions were separated into normal and branched/cyclic components. By...
Hydrocarbon subfractions of a Carboniferous bituminous coal extract were subjected to compound-specific isotope analysis (CSIA). The carbon isotope compositions of individual n-alkanes, isoprenoids, aromatic hydrocarbons and triterpenoids were determined to provide supplementary confirmation for the biomarker sources as deduced from their molecular structures. The total bitumen extract has a δ ...
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