Abstract
The structural analyses of pyridine extracts of Australian Moura Coal and Chinese Tatung Coal were carried out from the quantitative 13C-, 1H-NMR and IR spectra.Each pyridine extract was separated into two fractions of petroleum ether soluble part (γ1), and petroleum insoluble and chloroform soluble part (γ2).Each of fractions γ1 was further fractionated into four fractions (Fr.γ1-A to γ1-D) by column chromatography of alumina.Both Fr.γ1-A were found to be composed of unbranched C18-C34 alkanes by gas chromatography.From the average molecular structure parameters, it may be concluded that Fr.γ1-B to γ1-D in both coals consist of aromatic systems with diaromatics to tet-raaromatics (pyrenes), fractions Ti of Tatung and Moura coals have hydroaromatic structures consisting of di-and triaromatics, and three mono-and one diaromatics with heterocyclic systems, respectively.
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