【摘要】 在Maple平台上先利用Virial方程计算甲醇—水二元体系的汽相逸度系数;然后分别用Margules方程、Van Laar方程、Wilson方程、NRTL方程以及UNIFAC模型计算该体系的液相活度系数。对运用该软件计算所得的汽液平衡常数(Ki)与实验测定值进行比较后发现,利用不同活度系数方程计算所得结果差异不大;使用该软件能提高计算精度与准确性;建立该软件的运算程序后可用于有关工程计算。更多还原

【Abstract】 Based on the two-term Virial equation,the fugacity coefficients of methanol and water in the vapor phase of the binary system of methanol-water were first calculated respectively by application of the software of Maple;then the activity coefficients of methanol and water in the liquid phase of the system were given respectively by equations of Margules,Van Laar,Wilson,NRTL and UNIFAC.Comparisons of the computed vapor-liquid equilibrium ratios(K) with the ones obtained by experiments showed that the difference of the computed K values was negligible with the above equations solved respectively;and also it was proven that the application of the software could improve the precision and accuracy of the calculations,and be helpful for certain engineering computations.更多还原