Thermal and Hydrolytic Decomposition of Hydrocarbons in Products of Sapropelites
V. YU. ROKOSOVA, P. V. GORYUNOVA, YU. V. ROKOSOV, N. N. ROKOSOVA, S. A. SOZINOV
Institute of Coal Chemistry and Material Science, Siberian Branch, Russian Academy of Sciences, Kemerovo, Russia
Keywords: сапропелиты, термогидролитическая трансформация, углеводороды, хромато-масс-спектрометрия, биомаркеры, sapropelite, thermal and hydrolytic decomposition, hydrocarbons, gas chromatography-mass spectrometry, biomarkers
Pages: 594-602
Abstract
The qualititative and quantitative composition of hydrocarbons generated during thermal and hydrolytic decomposition of sapropelites from the Kushmurun and Maoyoming deposits in Kazakhstan and China, respectively, was identified. Thermal and hydrolytic decomposition of sapropelites organic mass in an aqueous alkaline medium at 400 °С by approximately 40-60% was related to the generation of neutral and acid heteroatomic compounds and only by 5-10% - to paraffin-naphthene-aromatic, mainly, normal С12-С27 and С12-С31 alkanes, С13-С23 and С14-С27 alkenes, and also aromatic and naphthene-aromatic components, as discovered. It was noted that unlike anhydrous pyrolysis results, thermal hydrolysis products contained more monounsaturated olefins with different double bond positions. Proceeding from the composition of biomarker hydrocarbons, it was concluded that they were associated with the lithogenetic maturity of sapropelite organic mass. In addition, the sea origin of the initial biomass of lipid structural elements was suggested.
DOI: 10.15372/CSD20170610
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