Influence of the properties of resins on the interactions between asphaltenes and resins

The properties of two resins (Tahe resin and Liaohe resin) and their influences on the dispersion of two asphaltenes (Tahe asphaltene and Liaohe asphaltene) are investigated by laboratory experiments. The results indicate that the adsorption isotherms of two resins are accorded with the Freundlich absorption model. The shape of the curves obtained could be attributed to both multilayer adsorption of resins on asphaltenes surfaces and the penetration of resins into the microporous structure of the asphaltenes. Based on the combined results from the shape of the curves and chemical properties of resins, the relative adsorption quantity of Tahe resin is higher than that of Liaohe resin due to the stronger polarity of Tahe resin, and the effect of Tahe resin on the dispersion of asphaltene is stronger than that of Liaohe rein. The different properties of resin can directly lead to the difference of dispersion performance on asphaltene in crude oil, which is closely related to the chemical structure of resin. The more the number of aromatic structure of the resin, the stronger the effect of resin on the dispersion of asphaltene there is.