Dynamic nuclear polarization in suspensions of asphaltene obtained from MC-30 liquid asphalt

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dc.contributor.buuauthorÇimenoğlu, Mehmet Akif
dc.contributor.departmentUludağ Üniversitesi/Fen Edebiyat Fakültesi/Fizik Bölümü.tr_TR
dc.contributor.scopusid15818856600tr_TR
dc.date.accessioned2021-09-15T13:26:31Z
dc.date.available2021-09-15T13:26:31Z
dc.date.issued2001-11
dc.description.abstractNuclear magnetic resonance and the Overhauser effect type dynamic nuclear polarization were used to study some colloidal suspensions of asphaltene obtained from MC-30 liquid asphalt in a weak magnetic field of 1.437 mT. Intermolecular spin-spin interactions occur between diffusing nuclear spins in the solvent medium and the unpaired electron spin in the asphaltene micelles. The samples were prepared in ten pure and six mixed solvent media. The Electron Paramagnetic Resonance spectrum of the asphaltene was obtained and the saturation experiments were applied to the samples. The dipolar interaction is predominant for all suspensions. Solvent molecules can diffuse freely in and out of the asphaltene micelles making dipolar interaction. Some solvent molecules, in the same sample, can attach to the asphaltene particles for an extremely short time, forming complexes and making scalar interaction. The variation of the nuclear-electron coupling parameter with the low frequency relaxation component for each pure solvent medium and the solvent effects Of CCl4 and CS2 which do not contain proton (H-1 nucleus) were investigated using mixed solvent media. The results are compared with some other studies.en_US
dc.identifier.citationÇimenoğlu, M. A. (2001). "Dynamic nuclear polarization in suspensions of asphaltene obtained from MC-30 liquid asphalt". Fuel, 80(14), 2041-2047.en_US
dc.identifier.endpage2047tr_TR
dc.identifier.issn0016-2361
dc.identifier.issue14tr_TR
dc.identifier.scopus2-s2.0-0035497735tr_TR
dc.identifier.startpage2041tr_TR
dc.identifier.urihttps://doi.org/10.1016/S0016-2361(01)00090-4
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0016236101000904
dc.identifier.urihttp://hdl.handle.net/11452/21973
dc.identifier.volume80tr_TR
dc.identifier.wos000172426300008tr_TR
dc.indexed.scopusScopusen_US
dc.indexed.wosSCIEen_US
dc.language.isoenen_US
dc.publisherElsevier Scienceen_US
dc.relation.journalFueltr_TR
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergitr_TR
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAsphalteneen_US
dc.subjectDynamic nuclear polarizationen_US
dc.subjectIntermolecular spin-spin interactionsen_US
dc.subjectOximetryen_US
dc.subjectComplexationen_US
dc.subjectDiffusionen_US
dc.subjectMagnetic field effectsen_US
dc.subjectMicellesen_US
dc.subjectNuclear magnetic resonanceen_US
dc.subjectParamagnetic resonanceen_US
dc.subjectPolarizationen_US
dc.subjectSolventsen_US
dc.subjectSpectrum analysisen_US
dc.subjectSuspensions (fluids)en_US
dc.subjectDynamic nuclear polarizationen_US
dc.subjectAsphalten_US
dc.subject.scopusMagic Angle Spinning; Spin Polarization; Cyclotron Resonance Devicesen_US
dc.subject.wosEnergy & fuelsen_US
dc.subject.wosEngineering, chemicalen_US
dc.titleDynamic nuclear polarization in suspensions of asphaltene obtained from MC-30 liquid asphalten_US
dc.typeArticle
dc.wos.quartileQ1en_US

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