期刊
FUEL
卷 118, 期 -, 页码 308-315出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2013.11.003
关键词
Kerogen; Solid-state C-13 NMR; Hydrous pyrolysis; Artificial maturation
资金
- Russian Foundation for Basic Research [11-05-00699-a]
- program of fundamental research of UB RAS [12-M-57-2047]
Chemical changes in the structure of kerogen during simulated thermal maturation were investigated by solid-state C-13 NMR spectroscopy. The spin counting technique was used to evaluate the share of observable'' carbon atoms with increasing hydrous pyrolysis temperature. The obtained one-dimensional CP-MAS spectra showed that up to 50% of ether bonds were destroyed during the initial stages of sample heating. In spite of the loss of a significant part of alkyl chains, kerogen remained aliphatic. The aromatic structure of kerogen underwent considerable changes: two-dimensional H-1-C-13 heteronuclear solid-state NMR (HETCOR) spectra showed that in the process of hydrous pyrolysis, the redistribution of carbon atoms took place - branched aromatic carbons transform into bridgehead aromatic carbons. (C) 2013 Elsevier Ltd. All rights reserved.
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