CHARACTERIZATION OF THE MACROMOLECULAR STRUCTURE OF PINGSHUO COAL MACERALS USING13C-NMR, XPS, FTIR AND XRD TECHNIQUES

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Abstract
The macromolecular strucutures of the three major macerals, vitrinite, exinite and fusinite, separated from a unique Pingshuo bituminous coal are probed and characterized using advanced analytical techniques including 13C-NMR, XPS, FTIR and XRD. Structural parameters of the individual macerals, for instance, aromaticity, carbon and hydrogen distribution, existing form of heteroatoms and functional groups are measured and investigated. The microcrystallite parameters are also calculated from XRD analysis. The results indicate that the differences in macromolecular structure of the three macerals are obvious and can be distinguished from each other.