Molecular mobility of crude oils via electron paramagnetic resonance of organic free radicals

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dataload.collectionmapped01 - Doutorado - Físicapt_BR
dataload.filenamenourau7358.pdfpt_BR
dataload.handlemapped123456789/45pt_BR
dataload.idpergamum189652pt_BR
dataload.idvirtuanourauvtls000231093pt_BR
dataload.idvirtuapergamumvtls000231093pt_BR
dataload.idvirtuapergamum.sameurlnourauSIMpt_BR
dataload.linknourauhttp://www.bibliotecadigital.uel.br/document/?code=vtls000231093pt_BR
dataload.linknourau.regularSIMpt_BR
dataload.linknourau.retificadohttp://www.bibliotecadigital.uel.br/document/?code=vtls000231093pt_BR
dataload.linknourau.size64.00pt_BR
dc.contributor.advisorDi Mauro, Eduardo [Orientador]pt_BR
dc.contributor.authorKhan, Alamzebpt_BR
dc.contributor.bancaPiccinato, Marilene Turinipt_BR
dc.contributor.bancaSalviato, Aroldopt_BR
dc.contributor.bancaVicentin, Bruno Luiz Santanapt_BR
dc.contributor.bancaValezi, Daniel Farinhapt_BR
dc.coverage.spatialLondrinapt_BR
dc.date.accessioned2024-05-01T15:17:20Z
dc.date.available2024-05-01T15:17:20Z
dc.date.created2019.00pt_BR
dc.date.defesa05.06.2019pt_BR
dc.description.abstractother1Abstract: Electron Paramagnetic Resonance (EPR) spectroscopy technique was applied to investigate the molecular mobility properties in different Pakistani origin crude oil samples All the samples used in the present study, were of paraffinic and aromatic in nature EPR experiments at X-band with variation in temperature (298-553K) were performed to predict the molecular mobility in both crude oil samples, by analysing the line-width of the organic free radical signal The viscosity of the samples was measured by using MCR Serie 31 Rheometer, inorder to study the mobility of the oil samples A change in the values of the viscosities has been observed, due to the different nature and composition of the oils The line-width studies in the EPR spectrum of the organic free radical exhibited significant changes with the variations in temperature condition, which is an important parameter to detect changes in molecular mobility of the samples, leading us to determine the different regimes of the mobility of the oils at the different temperatures The linewidths of the crude oil samples were also affected by temperature, although g-value was constant, revealing the changing in the chemical structure and the surrounding environment of free radicals during the studies The concentrations of the free radical follow the trends in the whole temperature range, first increasing and then decreasing This may be attributed to the competing mechanism of the generations and decomposition of the free radicals The present study proposes a new method to predict molecular mobility of oils by EPR of free radicalspt_BR
dc.description.notesTese (Doutorado em Física) - Universidade Estadual de Londrina, Centro de Ciências Exatas, Programa de Pós-Graduação em Físicapt_BR
dc.identifier.urihttps://repositorio.uel.br/handle/123456789/16958
dc.languagepor
dc.relation.coursedegreeDoutoradopt_BR
dc.relation.coursenameFísicapt_BR
dc.relation.departamentCentro de Ciências Exataspt_BR
dc.relation.ppgnamePrograma de Pós-Graduação em Físicapt_BR
dc.subjectFísicapt_BR
dc.subjectPetróleopt_BR
dc.subjectViscosidadept_BR
dc.subjectRessonância paramagnética eletrônicapt_BR
dc.subjectPhysicspt_BR
dc.subjectPetroleumpt_BR
dc.subjectViscositypt_BR
dc.subjectElectron paramagnetic resonancept_BR
dc.titleMolecular mobility of crude oils via electron paramagnetic resonance of organic free radicalspt_BR
dc.typeTesept_BR

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