Sub- and supercritical water in the processes of conversion of Domanik rock organic matter

Studies on the conversion of organic matter of high-carbon Domanik (siliceous-clay carbonate) rock of the Romashkinskoye deposit with a mineral content Corg of 7.07% in sub- and supercritical water have been carried out. It was shown that subcritical water at a temperature of 320°С and 17.0 MPa lead...

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Main Authors: Nasyrova Z.R., Kayukova G.P., Chemodanov A.E., Vakhin A.V.
Format: Article
Language:English
Published: EDP Sciences 2021-01-01
Series:E3S Web of Conferences
Online Access:https://www.e3s-conferences.org/articles/e3sconf/pdf/2021/42/e3sconf_ti2021_07001.pdf
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spelling doaj-e8718660dd7f48b09027131a483f05182021-06-11T07:18:51ZengEDP SciencesE3S Web of Conferences2267-12422021-01-012660700110.1051/e3sconf/202126607001e3sconf_ti2021_07001Sub- and supercritical water in the processes of conversion of Domanik rock organic matterNasyrova Z.R.0Kayukova G.P.1Chemodanov A.E.2Vakhin A.V.3Institute of Geology and Oil and Gas Technologies, Kazan Federal UniversityArbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of ScienceInstitute of Geology and Oil and Gas Technologies, Kazan Federal UniversityInstitute of Geology and Oil and Gas Technologies, Kazan Federal UniversityStudies on the conversion of organic matter of high-carbon Domanik (siliceous-clay carbonate) rock of the Romashkinskoye deposit with a mineral content Corg of 7.07% in sub- and supercritical water have been carried out. It was shown that subcritical water at a temperature of 320°С and 17.0 MPa leads to a partial decomposition of the kerogenic structure, increasing the yield of bitumen from 3.12 to 3.98%, and a more complete recovery of asphaltenes and heavy C22-C30 n-alkanes from the rock sample. Supercritical water at temperatures of 374 and 420°C and pressures above 24.4 MPa leads to intensive formation of hydrocarbon and inorganic gases in the processes of kerogen decomposition, destruction of aliphatic substituents from condensed heteroatomic structures of resins and asphaltenes, and the carbonate component of Domanik rock. Degradation of the organic matter of the Domanik rock is also accompanied by the formation of saturated hydrocarbons with an increased content of light C12-C21 n-alkanes, and carbonaceous substances, such as carbene-carboids. Changes in the structure of asphaltenes and their paramagnetic properties were determined by the EPR method. The influence of sub- and supercritical water on phase changes in the composition of rock minerals, as well as on the yield and composition of formed gases, was revealed.https://www.e3s-conferences.org/articles/e3sconf/pdf/2021/42/e3sconf_ti2021_07001.pdf
collection DOAJ
language English
format Article
sources DOAJ
author Nasyrova Z.R.
Kayukova G.P.
Chemodanov A.E.
Vakhin A.V.
spellingShingle Nasyrova Z.R.
Kayukova G.P.
Chemodanov A.E.
Vakhin A.V.
Sub- and supercritical water in the processes of conversion of Domanik rock organic matter
E3S Web of Conferences
author_facet Nasyrova Z.R.
Kayukova G.P.
Chemodanov A.E.
Vakhin A.V.
author_sort Nasyrova Z.R.
title Sub- and supercritical water in the processes of conversion of Domanik rock organic matter
title_short Sub- and supercritical water in the processes of conversion of Domanik rock organic matter
title_full Sub- and supercritical water in the processes of conversion of Domanik rock organic matter
title_fullStr Sub- and supercritical water in the processes of conversion of Domanik rock organic matter
title_full_unstemmed Sub- and supercritical water in the processes of conversion of Domanik rock organic matter
title_sort sub- and supercritical water in the processes of conversion of domanik rock organic matter
publisher EDP Sciences
series E3S Web of Conferences
issn 2267-1242
publishDate 2021-01-01
description Studies on the conversion of organic matter of high-carbon Domanik (siliceous-clay carbonate) rock of the Romashkinskoye deposit with a mineral content Corg of 7.07% in sub- and supercritical water have been carried out. It was shown that subcritical water at a temperature of 320°С and 17.0 MPa leads to a partial decomposition of the kerogenic structure, increasing the yield of bitumen from 3.12 to 3.98%, and a more complete recovery of asphaltenes and heavy C22-C30 n-alkanes from the rock sample. Supercritical water at temperatures of 374 and 420°C and pressures above 24.4 MPa leads to intensive formation of hydrocarbon and inorganic gases in the processes of kerogen decomposition, destruction of aliphatic substituents from condensed heteroatomic structures of resins and asphaltenes, and the carbonate component of Domanik rock. Degradation of the organic matter of the Domanik rock is also accompanied by the formation of saturated hydrocarbons with an increased content of light C12-C21 n-alkanes, and carbonaceous substances, such as carbene-carboids. Changes in the structure of asphaltenes and their paramagnetic properties were determined by the EPR method. The influence of sub- and supercritical water on phase changes in the composition of rock minerals, as well as on the yield and composition of formed gases, was revealed.
url https://www.e3s-conferences.org/articles/e3sconf/pdf/2021/42/e3sconf_ti2021_07001.pdf
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