EXAMINATION OF INFLUENCING FACTORS FOR CHARGE PROPERTY OF ASPHALTENES

Abstract

 In this investigation, the factors that can influence the charge characteristics of asphaltene were verified. As a result, it was shown that the deteriorated asphaltene was negatively charged regardless of the deterioration factor, the composition of the rejuvenators, and the repeated-recycle asphalt. Also the absolute value of the zeta potential was suggested to vary depending on the degree of oxidative deterioration. In addition, the charge property of the asphaltene-resin mixed suspension was affected by deteriorated asphaltene or deteriorated resin. However, it seems that aggregation occurred at low pH if asphaltene or resin deteriorated. Furthermore, it was suggested that, in the non-aqueous solvent the electrostatic repulsive energy contributed less to the interaction between asphaltene particles.