Carbon-13 CP/MAS spectroscopy of coal macerals

✍ Scribed by Kurt W. Zilm; Ronald J. Pugmire; Stephen R. Larter; James Allan; David M. Grant

• Publisher: Elsevier Science
• Year: 1981
• Tongue: English
• Weight: 810 KB
• Volume: 60
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(81)90225-8

✦ Synopsis

13C n.m.r. spectra of kerogen concentrates isolated from several different subbituminous to high-volatile bituminous coal macerals have been obtained by a combined cross polarization/magic-angle spinning technique. The samples comprise three vitrinites, two sporinites, two alginites and one fusinite, all of Upper Paleozoic age. It is shown that this technique can be used to differentiate the maceral types by providing characteristic spectral fingerprints. Aromaticities decrease in the order fusinite>vitrinite > sporinite > alginite, as expected with the rank range studied. Furthermore, fine spectral details provide aeneral information on the nature and distribution of discrete structural moieties and their variations with both type and rank.