KFU. Card publication. EPR study of spectra transformations of the intrinsic vanadyl-porphyrin complexes in heavy crude oils with temperature to probe the asphaltenes' aggregation

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EPR STUDY OF SPECTRA TRANSFORMATIONS OF THE INTRINSIC VANADYL-PORPHYRIN COMPLEXES IN HEAVY CRUDE OILS WITH TEMPERATURE TO PROBE THE ASPHALTENES' AGGREGATION

Form of presentation

Articles in international journals and collections

Year of publication

2018

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Authors, employees of KFU

Vakhin Aleksey Vladimirovich, author

Volodin Mikhail Aleksandrovich, author

Gafurov Marat Revgerovich, author

Mamin Georgiy Vladimirovich, author

Orlinskiy Sergey Borisovich, author

Rodionov Aleksandr Aleksandrovich, author

Sorokina Aleksandra Timurovna, author

Other authors

Dolomatov Mikhail Yurevich, author

Bibliographic description in the original language

Gafurov M.R. EPR study of spectra transformations of the intrinsic vanadyl-porphyrin complexes in heavy crude oils with temperature to probe the asphaltenes' aggregation / M.R. Gafurov, M.A. Volodin, A.A. Rodionov, A.T. Sorokina, M.Yu. Dolomatov, A.V. Petrov, A.V. Vakhin, G.V. Mamin, S.B. Orlinskii // Journal of Petroleum Science and Engineering. – 2018. – V. 166. – P. 363-368.

Annotation

Temperature dependencies of electron paramagnetic resonance spectra of intrinsic paramagnetic vanadyl complexes and dynamical viscosity for two heavy crude oils and asphalt samples are measured. Transitions between the different motional conditions (from the rigid to the fast motion regimes) are observed. The rotational correlation times (in the model of the isotropic diffusion) are extracted. It is shown that the characteristic temperatures for the motional regime transitions are mainly defined by the asphaltenes' content. From our analysis it follows that the thermal treatment leads to the destruction of the asphaltene complexes onto the 4–5 small pieces. The results indicate that paramagnetic vanadyl complexes are the sensitive intrinsic probes to study qualitatively and quantitatively structural transformations of aspahltenes of heavy crude oils in-situ.

Keywords

Bitumen, Crude oil, Heavy oil, Rotational correlation time, Temperature dependence,ESR

The name of the journal

Journal of Petroleum Science and Engineering

On-line resource for training course

http://dspace.kpfu.ru/xmlui/bitstream/handle/net/130812/S.EPR.Gafurov.pdf?sequence=1&isAllowed=y

URL

https://www.sciencedirect.com/science/article/pii/S0920410518301517

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

https://repository.kpfu.ru/eng/?p_id=177331&p_lang=2

Resource files

File name	Size (MB)	Format
S.EPR.Gafurov.pdf	1,05	pdf	show / download

Full metadata record

Field DC	Value	Language
dc.contributor.author	Vakhin Aleksey Vladimirovich	ru_RU
dc.contributor.author	Volodin Mikhail Aleksandrovich	ru_RU
dc.contributor.author	Gafurov Marat Revgerovich	ru_RU
dc.contributor.author	Mamin Georgiy Vladimirovich	ru_RU
dc.contributor.author	Orlinskiy Sergey Borisovich	ru_RU
dc.contributor.author	Rodionov Aleksandr Aleksandrovich	ru_RU
dc.contributor.author	Sorokina Aleksandra Timurovna	ru_RU
dc.contributor.author	Dolomatov Mikhail Yurevich	ru_RU
dc.date.accessioned	2018-01-01T00:00:00Z	ru_RU
dc.date.available	2018-01-01T00:00:00Z	ru_RU
dc.date.issued	2018	ru_RU
dc.identifier.citation	Gafurov M.R. EPR study of spectra transformations of the intrinsic vanadyl-porphyrin complexes in heavy crude oils with temperature to probe the asphaltenes' aggregation / M.R. Gafurov, M.A. Volodin, A.A. Rodionov, A.T. Sorokina, M.Yu. Dolomatov, A.V. Petrov, A.V. Vakhin, G.V. Mamin, S.B. Orlinskii // Journal of Petroleum Science and Engineering. – 2018. – V. 166. – P. 363-368.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=177331&p_lang=2	ru_RU
dc.description.abstract	Journal of Petroleum Science and Engineering	ru_RU
dc.description.abstract	Temperature dependencies of electron paramagnetic resonance spectra of intrinsic paramagnetic vanadyl complexes and dynamical viscosity for two heavy crude oils and asphalt samples are measured. Transitions between the different motional conditions (from the rigid to the fast motion regimes) are observed. The rotational correlation times (in the model of the isotropic diffusion) are extracted. It is shown that the characteristic temperatures for the motional regime transitions are mainly defined by the asphaltenes' content. From our analysis it follows that the thermal treatment leads to the destruction of the asphaltene complexes onto the 4–5 small pieces. The results indicate that paramagnetic vanadyl complexes are the sensitive intrinsic probes to study qualitatively and quantitatively structural transformations of aspahltenes of heavy crude oils in-situ.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Bitumen	ru_RU
dc.subject	Crude oil	ru_RU
dc.subject	Heavy oil	ru_RU
dc.subject	Rotational correlation time	ru_RU
dc.subject	Temperature dependence	ru_RU
dc.subject	ESR	ru_RU
dc.title	EPR study of spectra transformations of the intrinsic vanadyl-porphyrin complexes in heavy crude oils with temperature to probe the asphaltenes' aggregation	ru_RU
dc.type	Articles in international journals and collections	ru_RU