Non-linear dynamics of mass transfer process with an interphase fractal structure in liquid-liquid system

As a liquid-liquid system is away from equilibrium state, the phase thickness is variable when mass transfer process with chemical reaction occurs in interphase region, and a dispersible transitional layer called the interphase dispersed zone (IDZ) is formed. It is found that some small voltage electrostatic field applied to the liquid-liquid mass transfer reaction system can trigger a jump of mass transfer rate. To elucidate experimental results, this study simplifies IDZ to a dynamic layer - σ phase model, of which the porosity varies with time. The models of non-equilibrium thermodynamic mass transfer and the fractal reaction mass transfer kinetics are applied to obtain the experimental data through the stripping system of DEHPA-Cu ²⁺-CCl₄/H₂O to which is added surfactant and applied 15v electrostatic field. The evaluative regularity of parameters obtained from the experiments such as interfacial thickness, disjoining pressure, porosity of interphase layer etc. explains the non-linear mass transfer characteristics of the experimental process, which indicates that the above models can sufficiently reflect the connotation of the model for IDZ in the liquid-liquid phase system.