KFU. Card publication. Influence of Co-based catalyst on subfractional composition of heavy oil asphaltenes during aquathermolysis

KAZAN
FEDERAL UNIVERSITY

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INFLUENCE OF CO-BASED CATALYST ON SUBFRACTIONAL COMPOSITION OF HEAVY OIL ASPHALTENES DURING AQUATHERMOLYSIS

Form of presentation

Articles in international journals and collections

Year of publication

2020

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Authors, employees of KFU

Vakhin Aleksey Vladimirovich, author

Klochkov Vladimir Vasilevich, author

Laykov Aleksandr Vladimirovich, author

Mukhamatdinov Irek Izailovich, author

Rakhmatullin Ilfat Zufarovich, author

Salikh Indad Sharifsalikh, author

Sitnov Sergey Andreevich, author

Bibliographic description in the original language

I.I. Mukhamatdinov, I.Sh.S. Salih, I.Z. Rakhmatullin, S.A. Sitnov, A.V. Laikov, V.V. Klochkov, A.V. Vakhin. Influence of Co-based catalyst on subfractional composition of heavy oil asphaltenes during aquathermolysis, Journal of Petroleum Science and Engineering, 2020, 186, 106721.

Annotation

The chemical changes in the composition of asphaltene subfractions of heavy oil under the influence of oilsoluble Co-based catalyst were investigated. The results of SARA-analysis and MALDI-spectroscopy revealed a decrease in absolute content of asphaltenes and their molecular masses in the presence of catalyst. Moreover, the sulfur content was decreased under the catalyst influence and it was mostly observed in the subfraction with the highest molecular weight (A5). The main catalytic reaction was a destructive hydrogenation, directed to break the –�–S–C– bonds in the asphaltene molecules. The 13C NMR spectra revealed the decrease in average length of chain (MCL) after catalytic treatment by 15 times in A1 subfraction, which was accepted as a solvate layer and almost by 13 times in A2 subfraction. The C–O and C–S bonds break in the side chains of aromatic and alicyclic hydrocarbons. The content of primary (Cp) and the sum of secondary and quaternary (Csq) carbons was increased, while the content of tertiary (Ct) and aromatic carbons (Car) declined. The high-molecular poly-alicyclic and polyaromatic components had lost the straight and branched aliphatic hydrocarbons, and then were transformed into coke like substance – carbene-carboids.

Keywords

asphaltenes, subfractions, heavy oil, hydrothermal catalytic conversion, IR-spectroscopy, nuclear magnetic resonance

The name of the journal

Journal of Petroleum Science and Engineering

URL

https://www.sciencedirect.com/science/article/pii/S0920410519311416?via%3Dihub

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

https://repository.kpfu.ru/eng/?p_id=221770&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Vakhin Aleksey Vladimirovich	ru_RU
dc.contributor.author	Klochkov Vladimir Vasilevich	ru_RU
dc.contributor.author	Laykov Aleksandr Vladimirovich	ru_RU
dc.contributor.author	Mukhamatdinov Irek Izailovich	ru_RU
dc.contributor.author	Rakhmatullin Ilfat Zufarovich	ru_RU
dc.contributor.author	Salikh Indad Sharifsalikh	ru_RU
dc.contributor.author	Sitnov Sergey Andreevich	ru_RU
dc.date.accessioned	2020-01-01T00:00:00Z	ru_RU
dc.date.available	2020-01-01T00:00:00Z	ru_RU
dc.date.issued	2020	ru_RU
dc.identifier.citation	I.I. Mukhamatdinov, I.Sh.S. Salih, I.Z. Rakhmatullin, S.A. Sitnov, A.V. Laikov, V.V. Klochkov, A.V. Vakhin. Influence of Co-based catalyst on subfractional composition of heavy oil asphaltenes during aquathermolysis, Journal of Petroleum Science and Engineering, 2020, 186, 106721.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=221770&p_lang=2	ru_RU
dc.description.abstract	Journal of Petroleum Science and Engineering	ru_RU
dc.description.abstract	The chemical changes in the composition of asphaltene subfractions of heavy oil under the influence of oilsoluble Co-based catalyst were investigated. The results of SARA-analysis and MALDI-spectroscopy revealed a decrease in absolute content of asphaltenes and their molecular masses in the presence of catalyst. Moreover, the sulfur content was decreased under the catalyst influence and it was mostly observed in the subfraction with the highest molecular weight (A5). The main catalytic reaction was a destructive hydrogenation, directed to break the –�–S–C– bonds in the asphaltene molecules. The 13C NMR spectra revealed the decrease in average length of chain (MCL) after catalytic treatment by 15 times in A1 subfraction, which was accepted as a solvate layer and almost by 13 times in A2 subfraction. The C–O and C–S bonds break in the side chains of aromatic and alicyclic hydrocarbons. The content of primary (Cp) and the sum of secondary and quaternary (Csq) carbons was increased, while the content of tertiary (Ct) and aromatic carbons (Car) declined. The high-molecular poly-alicyclic and polyaromatic components had lost the straight and branched aliphatic hydrocarbons, and then were transformed into coke like substance – carbene-carboids.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	asphaltenes	ru_RU
dc.subject	subfractions	ru_RU
dc.subject	heavy oil	ru_RU
dc.subject	hydrothermal catalytic conversion	ru_RU
dc.subject	IR-spectroscopy	ru_RU
dc.subject	nuclear magnetic resonance	ru_RU
dc.title	Influence of Co-based catalyst on subfractional composition of heavy oil asphaltenes during aquathermolysis	ru_RU
dc.type	Articles in international journals and collections	ru_RU