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Structural analysis of Aleksinac oil shale kerogen by high-resolution solid-state C n.m.r. spectroscopy |
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| Authors: | Zoran ?ujovi? Radivoje Sreji? Dušan Vu?eli? Dragomir Vitorovi? Branimir Jovan?i?evi? |
| Affiliation: | aInstitute of General and Physical Chemistry, Studentski trg 12-16, PO Box 551, 11000 Belgrade, Yugoslavia;bFaculty of Sciences and Mathematics, School of Physical Chemistry, Belgrade University, 11000 Belgrade, Yugoslavia;cCentre of Chemistry, Institute of Chemistry, Technology and Metallurgy, Njego?eva 12, 11000 Belgrade, Yugoslavia;dFaculty of Sciences and Mathematics, School of Chemistry, Belgrade University, 11000 Belgrade, Yugoslavia |
| Abstract: | A sample of kerogen from Aleksinac oil shale was examined by high-resolution solid-state 13C n.m.r. spectroscopy. The presence and relative proportions of kerogen structural units were estimated using a combination of NQS and T1 C methods with a peak-synthesis technique applied to the 13C CP—MAS spectrum. Relaxation parameters from these experiments were used to estimate differences in relative ‘mobility’ of various structural units. The kerogen was found to be highly aliphatic and to contain  79% long-chain aliphatic plus alicyclic structures, as well as 9% aromatic structures. These findings are in good agreement with the characterization of the same kerogen from its oxidation products. |
| Keywords: | kerogen molecular structure carbon-13 n m r |
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