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Characterization of the residual carbon in retorted oil shale by solid-state 13C n.m.r.

✍ Scribed by Francis P. Miknis; Nikolaus M. Szeverenyi; Gary E. Maciel

Publisher: Elsevier Science
Year: 1982
Tongue: English
Weight: 682 KB
Volume: 61
Category: Article
ISSN: 0016-2361
DOI: 10.1016/0016-2361(82)90048-5

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✦ Synopsis

Cross

-polarization and magic-angle spinning suggest that the aromatic carbons in oil shales are largely inert to thermal processes and instead are responsible for the carbonaceous residue obtained during retorting. These results are based on 13C n m.r. measurements of the organic carbon distribution of oil shales, before and after Fischer assaying, and for oil shales of different grades, geographic location, geologic ages and formations. The n.m.r. measurements suggest further that measurements of the organic carbon distribution of oil shales heated to various temperatures have practical relevance, and thatthis information can be of value in discriminating between unconverted kerogen and residual carbon in heated oil shales.

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