KFU. Card publication. Hydrothermal upgrading of heavy oil in the presence of water at sub-critical, near-critical and supercritical conditions

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HYDROTHERMAL UPGRADING OF HEAVY OIL IN THE PRESENCE OF WATER AT SUB-CRITICAL, NEAR-CRITICAL AND SUPERCRITICAL CONDITIONS

Form of presentation

Articles in international journals and collections

Year of publication

2019

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Authors, employees of KFU

Al-Muntaser Amin Akhmed Mokhammed , author

Bibliographic description in the original language

Al-Muntaser AA, Varfolomeev MA, Suwaid MA, Yuan C, Chemodanov AE, Feoktistov DA, Rakhmatullin IZ, Abbas M, Domínguez-Álvarez E, Akhmadiyarov AA, Klochkov VV. Hydrothermal upgrading of heavy oil in the presence of water at sub-critical, near-critical and supercritical conditions. Journal of Petroleum Science and Engineering. 2019 Oct 14:106592.

Annotation

In this study, the hydrothermal upgrading (HTU) of high sulfur-content heavy oil was investigated at sub-critical (Sub-CW), near-critical (NCW) and supercritical water (SCW) conditions. Products obtained after HTU, including gases, liquid, and coke (if formed), were analyzed to understand the upgrading performance at different conditions. At Sub-CW (200, 250, and 300 ?C), 250 ?C is the optimum temperature where a viscosity reduction from 2073 to 1758 mPa s was achieved with a slight removal of sulfur (mainly sulfur) and the generation of a small amount of light and non-condensable hydrocarbons in gas phase (C1–C4, isoalkanes and alkenes, H2S, CO2 and H2, etc.). At NCW (350 ?C) and SCW (400 ?C), heavy oil was upgraded into light oil with a significant removal of heteroatoms, an increase of saturates content, a reduction of aromatics, resins and asphaltenes contents, and a high yield of light gaseous hydrocarbons (mainly methane). Simultaneously, each SARA fraction was also greatly ameliorated: the content of light alkanes with low molecular weight in saturates was increased, diaromatics content in aromatics was increased with a reduction of polyaromatics content, aromatics-type carbon atoms in resins was increased with a decrease in aliphatic hydrocarbons. Moreover, MALDI-TOF measurements of asphaltenes show that the molecular weights of asphaltenes were reduced. All these results indicated that HTU at Sub-CW can be used for heavy oil pre-treatment (in-situ or ex-situ upgrading) considering its main effect of viscosity reduction with a small removal of heteroatoms, while HTU at NCW and SWC has a great potential in in-situ and ex-situ upgrading and oil refining as it can convert heavy oil into light oil.

Keywords

Heavy oil, Hydrothermal upgrading, Sub-critical water, Near-critical water, Supercritical water, In-situ upgrading

The name of the journal

Journal of Petroleum Science and Engineering

URL

https://www.sciencedirect.com/science/article/pii/S0920410519310137

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=216352&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Al-Muntaser Amin Akhmed Mokhammed	ru_RU
dc.date.accessioned	2019-01-01T00:00:00Z	ru_RU
dc.date.available	2019-01-01T00:00:00Z	ru_RU
dc.date.issued	2019	ru_RU
dc.identifier.citation	Al-Muntaser AA, Varfolomeev MA, Suwaid MA, Yuan C, Chemodanov AE, Feoktistov DA, Rakhmatullin IZ, Abbas M, Domínguez-Álvarez E, Akhmadiyarov AA, Klochkov VV. Hydrothermal upgrading of heavy oil in the presence of water at sub-critical, near-critical and supercritical conditions. Journal of Petroleum Science and Engineering. 2019 Oct 14:106592.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=216352&p_lang=2	ru_RU
dc.description.abstract	Journal of Petroleum Science and Engineering	ru_RU
dc.description.abstract	In this study, the hydrothermal upgrading (HTU) of high sulfur-content heavy oil was investigated at sub-critical (Sub-CW), near-critical (NCW) and supercritical water (SCW) conditions. Products obtained after HTU, including gases, liquid, and coke (if formed), were analyzed to understand the upgrading performance at different conditions. At Sub-CW (200, 250, and 300 ?C), 250 ?C is the optimum temperature where a viscosity reduction from 2073 to 1758 mPa s was achieved with a slight removal of sulfur (mainly sulfur) and the generation of a small amount of light and non-condensable hydrocarbons in gas phase (C1–C4, isoalkanes and alkenes, H2S, CO2 and H2, etc.). At NCW (350 ?C) and SCW (400 ?C), heavy oil was upgraded into light oil with a significant removal of heteroatoms, an increase of saturates content, a reduction of aromatics, resins and asphaltenes contents, and a high yield of light gaseous hydrocarbons (mainly methane). Simultaneously, each SARA fraction was also greatly ameliorated: the content of light alkanes with low molecular weight in saturates was increased, diaromatics content in aromatics was increased with a reduction of polyaromatics content, aromatics-type carbon atoms in resins was increased with a decrease in aliphatic hydrocarbons. Moreover, MALDI-TOF measurements of asphaltenes show that the molecular weights of asphaltenes were reduced. All these results indicated that HTU at Sub-CW can be used for heavy oil pre-treatment (in-situ or ex-situ upgrading) considering its main effect of viscosity reduction with a small removal of heteroatoms, while HTU at NCW and SWC has a great potential in in-situ and ex-situ upgrading and oil refining as it can convert heavy oil into light oil.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Heavy oil	ru_RU
dc.subject	Hydrothermal upgrading	ru_RU
dc.subject	Sub-critical water	ru_RU
dc.subject	Near-critical water	ru_RU
dc.subject	Supercritical water	ru_RU
dc.subject	In-situ upgrading	ru_RU
dc.title	Hydrothermal upgrading of heavy oil in the presence of water at sub-critical, near-critical and supercritical conditions	ru_RU
dc.type	Articles in international journals and collections	ru_RU