摘要 : Ash (S.N. Ash, P. Ray and B.V. Detta, AIChEJ., 31 (1985) 821; S.N. Ash, Chem. Eng. J., 48 (1992) 183) has proposed a correlation for calculating the binary parameters of the Wilson g~E model by using only pure-component parameters... 展开 Ash (S.N. Ash, P. Ray and B.V. Detta, AIChEJ., 31 (1985) 821; S.N. Ash, Chem. Eng. J., 48 (1992) 183) has proposed a correlation for calculating the binary parameters of the Wilson g~E model by using only pure-component parameters: solubility parameters, molar liquid volumes, relative van der Waals volumes and surfaces, critical properties, acentric factors and dipole moments. To evaluate the Ash correlation the vapour-liquid equilibria for 75 binary systems, activity coefficients at ininite dilution and excess enthalpies were predicted and compared with experimental data and with the modified UNIFAC model (J. Gmehling, J. Li and M. Schiller, Ind. Eng. Chem. Res., 32 (1993) 178). It was found that the correlation of Ash and coworkers is significantly inferior to the modified UNIFAC model and cannot be recommended for phase equilibrium predictions for those cases where UNIFAC parameters are available. 收起