A suite of oil shales which varied considerably both in type and Fischer assay yield were examined by infrared (i.r.) and nuclear magnetic resonance (n.m.r.) spectroscopy. Plots were constructed of the area of the aliphatic C-H stretching bands in the i.r. spectrum against the Fischer assay yield and also the per cent aliphatic carbon as determined by n.m.r. against yield. As expected from earlier studies, both gave correlations, but it was evident that the n.m.r. results gave a more accurate prediction of oil yield than did the i.r. data.
- infrared spectroscopy
- oil shale