The results of comparative investigations on the composition and rheological characteristics of superviscous oil during its interaction with isothermal fluids in a closed system are presented. It was shown that the degree of transformation of asphaltenes at a process temperature of 360°C increases with change of pressure from 4 to 21 MPa. Increase of the temperature and pressure of the process to 420°C and 24 MPa leads to destruction of the resin–asphaltenes with an increase of the yield of the fraction with the initial bp 200°C fraction, desulfurization, and decrease of viscosity. It was established that the presence of charcoal during hydrothermal transformation of superviscous oil at 385°C and 22.5 MPa leads to significant decrease of the asphaltene content. The presence of charcoal, iron and aluminum oxides, and nickel and copper carbonates promotes the formation of saturated and aromatic hydrocarbons and increases the yield of the fraction that boils out up to 200°C and to a twofold decrease of the sulfur content.
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Acknowledgments
The research was carried out with support from the Russian Science Foundation, Grant No. 18-77-10023, https://rscf.ru/project/18-77-10023/
The investigation was conducted using equipment of the Center of Complex Program «Nanomaterials and Nanotechnologies» of the Kazan National Research Technological University.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 1, pp. 61–65 January–February, 2023.
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Zakieva, R.R., Petrov, S.M. Hydrothermal Transformation of Superviscous Oil in the Presence of Coals, Metal Oxides, and Carbonates. Chem Technol Fuels Oils 59, 69–74 (2023). https://doi.org/10.1007/s10553-023-01505-9
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DOI: https://doi.org/10.1007/s10553-023-01505-9