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13C1H Cross-polarization nuclear magnetic resonance spectra of macerals from coal

✍ Scribed by Herbert L. Retcofsky; David L. VanderHart

Publisher
Elsevier Science
Year
1978
Tongue
English
Weight
318 KB
Volume
57
Category
Article
ISSN
0016-2361

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✦ Synopsis

The carbon aromaticities

(fa) of vitrinite, exinite, micrinite and fusinite from a high-volatile A bituminous coal have been determined by 13C-' H cross-polarization nuclear magnetic resonance spectrometry.

Values of f, for the four macerals were found to decrease in the order: fusinite > micrinite = vitrinite > exinite.

Estimates of the average ring size using the fa value and the elemental composition of each maceral indicated that the fusinite contained the largest polynuclear condensed aromatic ring system (> 5 rings) whereas the mean structural unit of the vitrinite contains 3-4 condensed rings.

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