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EPR as a complementary tool for the analysis of low-temperature oxidation reactions of crude oils

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dc.contributor.author Mehrabi-Kalajahi S.
dc.contributor.author Varfolomeev M.
dc.contributor.author Yuan C.
dc.contributor.author Emelianov D.
dc.contributor.author Khayarov K.
dc.contributor.author Klimovitskii A.
dc.contributor.author Rodionov A.
dc.contributor.author Orlinskii S.
dc.contributor.author Gafurov M.
dc.contributor.author Afanasiev I.
dc.contributor.author Fedorchenko G.
dc.contributor.author Lubnina E.
dc.date.accessioned 2019-01-22T20:38:13Z
dc.date.available 2019-01-22T20:38:13Z
dc.date.issued 2018
dc.identifier.issn 0920-4105
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/148070
dc.description.abstract © 2018 Elsevier B.V. Air injection is a promising method for enhanced oil recovery (EOR) in both conventional and unconventional oil sources. It is widely accepted that oxidation reactions between oil and injected air determine the success of an air injection process. In this study, electron paramagnetic resonance (EPR) was introduced as a new route to investigate the occurrence of low-temperature oxidation (LTO) and its behavior by monitoring the signals of free radicals. The EPR experiments were conducted for the different crude oil samples (light, medium and heavy) heated in both static air and flow air (air-bubbling) conditions under different temperatures from 25 °C to 180 °C. The results showed that the free-radical concentrations exhibited a good correspondence on the heating temperature. Furthermore, nuclear magnetic resonance (NMR), Fourier-transform infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) experiments were carried out to help to analyze the oxidation process and verify the EPR results. It turned out that the EPR results can be well supported by NMR, FTIR and DSC data, which indicates that proposed EPR monitoring method can be applied as a fast and low-cost technique to investigate LTO under mild reaction conditions. Simultaneously, the combination of EPR, NMR, FTIR and DSC can help to better understand the LTO mechanism and to monitor the application of in-situ combustion technique in the field.
dc.relation.ispartofseries Journal of Petroleum Science and Engineering
dc.subject Air injection
dc.subject Crude oil
dc.subject EPR
dc.subject Free radical concentration
dc.subject In-situ combustion
dc.subject Oxidation
dc.title EPR as a complementary tool for the analysis of low-temperature oxidation reactions of crude oils
dc.type Article
dc.relation.ispartofseries-volume 169
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 673
dc.source.id SCOPUS09204105-2018-169-SID85048381444


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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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