01509nab a2200205 4500 20260520001936.0 260224s2010 xxu The characterization of asphaltene behavior in some aromatic solvents by dynamic nuclear polarization technique dic. 2010 26/05/2011 ; 26/05/2011 7 p. ; 58-65 Transcripción del resumen del autor: Dynamic 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. 1-2 Journal of Petroleum Science & Engineering 75 ARTICULO Peksoz, Ahmet 50013 Almaz, Ekrem 50014 Yalciner, Aytac 50015 182021 182021 0 0 0 0 249840 BAAB BAAB 2026-03-05 200054061 0 200054061 2026-03-05 23:52:09 2026-03-05 ARTICULO