Arylmethoxyl groups in coal macerals
β Scribed by N.C. Deno; A.Daniel Jones; David O. Owen; Joseph I. Weinschenk III
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 588 KB
- Volume
- 64
- Category
- Article
- ISSN
- 0016-2361
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Electron paramagnetic resonance searches of thermally excited multiplet states in macerals, exinite, vitrinite, and inertinite of Polish medium-rank coal (85.6 wt% C), were performed. Numerical analysis of lineshape indicates a multicomponent structure of the EPR spectra of macerals heated at 300Β°an
Using density gradient centrifugation, 22 coals with varying maceral composition and rank have been separated. The carbon, hydrogen and nitrogen contents of selected density fractions have also been obtained for each coal. Examination of the data shows that the density gradient procedure provides in