НЕФТЯНАЯ ПРОВИНЦИЯ

Abstract

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This paper considers heavy oil aquathermolysis experiments in supercritical water conducted on reaction mixtures containing heavy oil, carbonaceous materials, and catalytically active rock-forming minerals.

The main characteristic feature of supercritical aquathermolysis products is increased content of paraffinic/naphthenic hydrocarbons: up to 76.2 wt% and 68.2 wt% for aquathermolysis products 4 and 5, respectively, compared to the original 40.8 wt%; whereas resin and aromatic fractions reduce. Aquathermolysis product 4 exhibits reduction of the aromatic and resin content from 13.7 to 4.1 wt% and from 37.8 to 13.1 wt%, respectively. Equidirectional change in the asphaltene content is also observed in aquathermolysis products: in experiments with hard coal (experiments 1 and 3) it has increased up to 9.9 and 9.2 wt%, respectively, compared to the original 7.7 wt%.

It has been demonstrated that aquathermolysis processes involve destruction of highmolecular-weight components and formation of normal and branched alkanes that have been absent in the original oil sample.

Resultant experimental data has been used to develop a process flow diagram of supercritical fluid technology for practical applications.

Key words:

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ultra-viscous oil, asphaltene, aquathermolysis, oil upgrading, supercritical aqueous fluid

References

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1. Tumanyan B.P et al. Akvatermoliz neftey i prirodnykh bitumov: khimizm protsessa, katalizatory, perspektivy promyshlennoy realizatsii [Aquathermolyses of oil and natural bitumen: underlying chemistry, catalysts, potential for commercialization]. Uspekhi khimii, 2015, No. 84 (11), 1145 – 1175 pp. (in Russian)

2. Desulfurization of hexyl sulfide and hexanethiol using supercritical water / Jimoon Kang [et al] // Journal of Supercritical Fluids. – 2019. – № 158. – P. 104734. (in English)

3. Visbreaking of Heavy Oil under Supercritical Water Environment / Jun Liu [et al] // Industrial & Engineering Chemistry Research. – 2017. - №57 (3). (in English)

4. Maity, S.K. Catalytic Aquathermolysis Used for Viscosity Reduction of Heavy Crude Oils: A Review / S.K. Maity, J. Ancheyta, G. Marroquın // Energy & Fuels. – 2010. – Vol. 24. – Р. 2809–2816. (in English)

5. H. Machida. Green chemical processes with supercritical fluids: Properties, materials, separations and energy / H. Machida, M. Takesue, R.L. Smith // Journal of Supercritical Fluids/ – 2012. – Vol. 43. – Р. 2–1 (in English)

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Authors

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R.R. Zakieva, Kazan National Research Technological University

68, K. Marx st., Kazan, 420015, Russian Federation

E-mail: zakieva.r.r@yandex.ru

 

N.Ju. Bashkirceva, Dr.Sc., Professor, Dean of Petroleum and Petrochemistry Faculty, Kazan National Research Technological University

68, K. Marx st., Kazan, 420015, Russian Federation

E-mail: bashkircevan@bk.ru

For citation:

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R.R. Zakieva, N.Yu. Bashkirtseva Oblagorazhivanie sverhvjazkoj nefti v sub- i sverhkriticheskom vodnom fljuide [Upgrading of ultra-viscous oil in sub- and supercritical aqueous fluid]. Neftyanaya Provintsiya, No. 1(25), 2021. pp. 141-149. DOI https://doi.org/10.25689/NP.2021.1.141-149 (in Russian)