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Dynamic nuclear polarization 13C n.m.r. of coal

✍ Scribed by R.B. Jones; S.D. Robertson; A.D.H. Clague; R.A. Wind; M.J. Duijvestijn; C. van der Lugt; J. Vriend; J. Smidt

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 606 KB
Volume: 65
Category: Article
ISSN: 0016-2361
DOI: 10.1016/0016-2361(86)90043-8

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✦ Synopsis

A novel n.m.r. method for determining the aromaticity of coal has been evaluated. Polarization transfer from the paramagnetic electrons is used to enhance the intensity of the ' 3C n m.r. spectrum. Analysis of five samples of Gondwana bituminous steam coals shows that the aromaticity of inertinite is far greater than that of vitrinite and that variation of maceral composition is a major factor determining coal aromaticity. This has been confirmed by the study of maceral concentrates.

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