COMPOSITIONS OF HYDROCARBONS AND HETEROORGANIC COMPOUNDS IN ORGANIC SUBSTANCE AND PRODUCTS OF THERMAL DECOMPOSITION UNDER SUPERCRITICAL CONDITIONS OF KEROGEN IN OIL SHALE FROM CHIM-LOPTYUG DEPOSIT

Abstract

New data are presented on the chemical nature of the organic substance in the sample of oil shale from the Upper Jurassic deposits, the section of the Chim-Loptyug area of the Yarengsky shale-bearing territory in the Timan-Severouralsk region (the Komi Republic) and in the products of its thermal dissolution in the supercritical flow of the aromatic solvent (benzene). The soluble organic substance in the sample under study was shown to be highly resinous and sour. Thermolysis of shale material in benzene under supercritical conditions increased the yield of the liquid product due to the destruction of bridge (C-S) and C-C bonds in kerogen. The contents of sulfur and oil components were found to increase in the composition of the resulting pyrolyzate. According to the chromatographic-mass spectrometric analysis bitumoid and pyrolyzate oils contained normal and isoprenoid alkanes, polycycloalkanes, mono- and polycyclic aromatic hydrocarbons and heteroorganic compounds. The pyrolyzate oils are characterized by the presence of unsaturated compounds in the hydrocarbon composition and a wider set of sulfur- and oxygen-containing structures. The sets of hydrocarbon and hetero-organic compounds identified in the pyrolyzate oils are typical for oily components in oils, which enables to consider pyrolizate as a raw material for the production of a wide range of fuels and lubricants, as well as valuable products for national economy. Based on the data on the distribution of biomarker hydrocarbons and the values of the calculated geochemical coefficients of the accumulation of organic substance in the investigated sample of oil shale it was established to occur in a sharply reducing situation in argillaceous deposit with a high contribution of marine phytoplankton to the initial biomass. The low thermal maturity of the organic substance indicates its high generation potential.Forcitation:Kovalenko E.Yu., Sagachenko T.A., Min R.S., Patrakov Yu.F. Compositions of hydrocarbons and heteroorganic compounds in organic substance and products of thermal decomposition under supercritical conditions of kerogen in oil shale from Chim-Loptyug deposit. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 7. P. 98-104