The ¹³C-NMR Solid State Spectroscopy of Various Classes of Coals

Authors

Charles A. Wilkie, Marquette UniversityFollow
Daniel T. Haworth, Marquette UniversityFollow

Document Type

Article

Language

eng

Publication Date

1978

Publisher

Elsevier

Source Publication

Journal of Inorganic and Nuclear Chemistry

Source ISSN

0022-1902

Abstract

The ¹³C-NMR spectra of various classes of coal obtained in the solid state show two resonances, one of which is assigned to aromatic carbon and the other to aliphatic carbon. The resonances are very broad with the high field resonance centered at about 7 ppm below tetramethylsilane and a low field resonance centered at about 140 ppm below tetramethysilane. Based on our previous solid state ¹³C-NMR studies of graphite and diamond, the high field resonance is typical of a sp³ carbon whereas the low fields resonance is assigned to a sp² carbon whereas the low fields resonance is assigned to a sp² carbon. It is found that the antracitic coals have more aromatic (sp²) carbons than the bituminous, subbituminous and lignite coals. The analytical implications of this technique are briefly discussed.

Comments

Accepted version. Journal of Inorganic and Nuclear Chemistry, Vol. 40, No. 12 (1978): 1989-1991. DOI. © 1978 Elsevier B.V. Used with permission.

Recommended Citation

Wilkie, Charles A. and Haworth, Daniel T., "The ¹³C-NMR Solid State Spectroscopy of Various Classes of Coals" (1978). Chemistry Faculty Research and Publications. 935.
https://epublications.marquette.edu/chem_fac/935