摘要
1980年Schmidt和Wenzel提出一个普遍化范德华状态方程,Iwai,Margerum和Lu对此方程加以改进,使极性流体的液体密度计算结果得到了改善。文中选用了一个依赖温度关系的新的表达式,并将方程中参数u看为与物性有关的参数。这样能使缔合性和极性流体的纯组分饱和蒸汽压计算值与实测值绝对平均百分偏差普遍地小于1％,此结果优于同类方程。
A generalized vdW equation of state is proposed by Schmiht and Wenzel(1980). Iwai, Margerum and Lu modified it to improve its representation for pure component liquid densities for polar fluids. A new temperature dependent function of α(T) was selected and the quantity u was taken to be substance dependent. The average absolute percentage deviations of the calculated vapor pressures for associted and polar components are generally less than 1%.
基金
国家自然科学基金
