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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

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dc.contributor.author Gafurov M.
dc.contributor.author Volodin M.
dc.contributor.author Rodionov A.
dc.contributor.author Sorokina A.
dc.contributor.author Dolomatov M.
dc.contributor.author Petrov A.
dc.contributor.author Vakhin A.
dc.contributor.author Mamin G.
dc.contributor.author Orlinskii S.
dc.date.accessioned 2019-01-22T20:38:04Z
dc.date.available 2019-01-22T20:38:04Z
dc.date.issued 2018
dc.identifier.issn 0920-4105
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/148064
dc.description.abstract © 2018 Elsevier B.V. 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.
dc.relation.ispartofseries Journal of Petroleum Science and Engineering
dc.subject Bitumen
dc.subject Crude oil
dc.subject ESR
dc.subject Heavy oil
dc.subject Rotational correlation time
dc.subject Temperature dependence
dc.title EPR study of spectra transformations of the intrinsic vanadyl-porphyrin complexes in heavy crude oils with temperature to probe the asphaltenes' aggregation
dc.type Article
dc.relation.ispartofseries-volume 166
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 363
dc.source.id SCOPUS09204105-2018-166-SID85043984470


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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