Journal
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
Volume 29, Issue 10, Pages 1505-1514Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01932690802316868
Keywords
Asphaltene; fluorescence; polarization; polydispersity; surface tension
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Formation of supermolecular structures in petroleum disperse systems is determined by interactions of asphaltenes. Petroleum systems are lyophilic oleocolloids with low polar dispersive media which is in dynamic balance with elements of disperse structure. Supermolecular scale of organization is most important for determining the macroscopic parameters. Levshin-Perrin equation for depolarization of fluorescence was modified for polydispersed systems. Interfacial tension coefficient of model asphaltene solution was calculated in a case of Volmer's function. For technogenic mixtures the temperature dependences of the sizes near the point of phase transition are presented. Enthalpy of asphaltene association per one molecule was calculated. Polarization degree together with macroscopic parameters correlates with appearance of asphaltene dispersed phase in system.
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