A number of thermograms and chromatograms were obtained by means of thermal chromatography from the Green River oil shale. Results indicated that bitumen can be separated efficiently from oil shale by controlled thermal heating. The chromat-ogram of thermally separated bitumen is identical to that of the solvent-extracted bitumen. Chromatograms of kerogen concentrate support the hypothesis that kerogen structure is a complex matrix made of multiple components.
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SCRIMA et al. (1974) studied this question.
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