Almaz, Ekrem2022-02-142022-02-142010-12Peksöz, A. vd. (2010). "The characterization of asphaltene behavior in some aromatic solvents by dynamic nuclear polarization technique". Journal of Petroleum Science and Engineering, 75(1-2), 58-65.0920-4105https://doi.org/10.1016/j.petrol.2010.10.014https://www.sciencedirect.com/science/article/pii/S0920410510002032http://hdl.handle.net/11452/24452Dynamic nuclear polarization (DNP) studies of asphaltene/some hydrocarbons solutions were performed at 1.53 mT. The low field EPR spectrum of Asphaltene/Mesitylene sample was recorded. The DNP parameters such as enhancement factor, nuclear-electron coupling constant, saturation factor, leakage factor, the parameter for the relative importance of scalar and translational dipolar interaction and the total spin-lattice relaxation rate were determined. The effect of irradiation with neutrons from the Ra-Be source to the DNP parameters was investigated. Dissolved molecular oxygen effect on the enhancement factor for each sample was examined experimentally. We also make some interpretations depending on the results obtained for the interactions between nuclei of the solvent and electrons delocalized on the asphaltene.eninfo:eu-repo/semantics/closedAccessDynamic nuclear polarizationProton-electron double resonanceAsphalteneAsphaltene oxidationOximetryElectron double-resonanceHighly fluorinated solutionsFree-radicalsSuspensionsDNPPetroleumPhysicsEnergy & fuelsEngineeringAsphaltenesDissolved oxygenElectronsHydrocarbonsMolecular oxygenOrganic solventsOxidationProtonsResonanceSpin polarizationAromatic solventDipolar interactionDynamic nuclear polarizationElectron couplingEnhancement factorEPR spectraLeakage factorLow fieldRelative importanceSaturation factorsSpin lattice relaxation ratesAsphalteneDissolved oxygenHydrocarbonIrradiationLeakagePolarizationSaturationSolventElectron spin resonance spectroscopyArticle0002868462000072-s2.0-782492326335865751-2Energy & fuelsEngineering, petroleumMagic Angle Spinning; Spin Polarization; Cyclotron Resonance Devices