The effect of sample age on dynamic nuclear polarization parameters in asphalt suspensions
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Date
2011
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Publisher
Taylor & Francis
Abstract
The Overhauser effect type dynamic nuclear polarization was used to study some colloidal suspensions with benzene, toluene, ethylbenzene, mesitylene, tetralin, and chlorobenzene solvent media of asphaltene obtained from MC-30 liquid asphalt in a weak magnetic field of 1.437 mT at room temperature. For each sample of solvent medium, the samples were prepared in three different asphaltene concentrations. The samples were held for ten years and then dynamic nuclear polarization parameters were found via dynamic nuclear polarization experiments that were performed again. Thus, the effect of sample age to dynamic nuclear polarization parameters was investigated. The results were discussed.
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Keywords
Energy & fuels, Engineering, Environmental sciences & ecology, Asphaltene, Double resonance, Dynamic nuclear polarization, Intermolecular spin-spin interaction, Overhauser effect, Resonance, Aromatic hydrocarbons, Asphalt, Asphaltenes, Benzene, Ethylbenzene, Magnetic fields, Nuclear magnetic resonance, Resonance, Spin polarization, Spin-lattice relaxation, Suspensions (fluids), Toluene, Colloidal suspensions, Double resonance, Dynamic nuclear polarization, Intermolecular spin-spin interaction, Liquid asphalt, ON dynamics, Overhauser effect, Room temperature, Solvent media, Tetralins, Weak magnetic fields, Suspensions (components)
Citation
Kırımlı, H. E. vd.(2011). "The effect of sample age on dynamic nuclear polarization parameters in asphalt suspensions". Energy Sources Part A-Recovery Utilization and Environmental Effects, 33(7), 604-611.