The shift from diffusion-controlled adsorption to an adsorption barrier regime, brought on by the steric hindrance effect between already adsorbed molecules particles, occurs for low solubility asphaltene solutions (asphaltene solutions in mixtures of toluene and aliphatic base oil). Surface coverage asymptotically approaches the 2-D packing limit of polydisperse disks, and the equilibrium interfacial tension is independent of asphaltene concentration in low solubility aliphatic oil. . In contrast, the interfacial tension for high solubility asphaltene solutions (asphaltene in toluene) depends on the concentration of asphaltenes in the solution, and the equilibrium surface coverage can be calculated using the Ward-Tordai equation . Low surface pressures and higher critical nano-aggregate concentration (CNAC) are obtained in high solubility asphaltenes for the same quantity of asphaltene, which is another impact of solubility . According to , equilibrium interfacial tension is achieved more quickly in aromatic solvents and more slowly in aliphatic solvents. Less asphaltene is needed to stabilize the emulsion in the aliphatic solvent . However, at lower concentrations, regardless of asphaltene solubility, emulsion stability is observed at a surface concentration of ~4 mg/m2 . At higher bulk asphaltene concentrations, surface coverage increases with increase in asphaltene concentration . Table shows a list of surface coverages obtained at different asphaltene concentrations. ). Rane and coworkers, however, find that transition to 'non-diffusion'-controlled kinetics is not in agreement with the conformational relaxation based on observations of transition time and the deviation from the diffusion-controlled regime . A later study reported that the interfacial tension and the dilational rheology data always follow the main features of the diffusion control regime, and the deviations could be explained by the poly-disperse nature of asphaltenes and distribution in adsorption coefficients within the asphaltenes class . A ternary mixture model for asphaltenes could explain most of the experimental results for dynamic interfacial tension and dilatational rheology at different times .