| 【文章摘要】 <正> Starting from isothermal excess volume data (two or more than two sets),and based on the “pseudo-2-fluid theory”,a computation procedure of vapor-liquid equilibrium data is proposed:(1)Calculation of characteristic parameters of pure components:V_i~*,P_i~* and T_i~*;(2)Calculation of characteristic parameters of pseudocomponents:V_(im)~*,P_(im)~* and T_(im)~*;(3) Calculation of excess enthalpy ~E;(4)Calculation of Gibbs free energy ~E or its Q function;(5)Calculation of bubble point;(6)Calculation of vapor-liquid equilibrium data.The computation results for benzene-cyclohexane,bensene-n-hexane,benzene-n-heptane,benzene-n-octane,carbon tetrachloride-benzene,carbon tetrachloride-cyclohexane and carbon tettachloride-n-heptane,compared with the corresponding vapor-liquid equilibrium experimental data and the data calculateddirectly from excess enthalpy,are satisfactory.Therefore,the proposed computation procedure is alsoappropriate to non-polar and slightly polar binary systems under relatively low pressures. |