低温高压下液态乙烯的p-V-T关系

提供一个普遍化高压液体的状态方程,并将它应用于计算压力最高达130MPa、温度范围为120K~220K的液态乙烯的pVT数据。将计算结果与文献数据对比,表明本方程适合用来描述高压下的液态乙烯的pVT行为。另外,进一步检验结果表明,本方程可以在更高压力范围获得推广应用(<500MPa)(例如:高压下直链烷烃压缩液体的P-V-T关系)。

Pressure-volume-temperature relationship of liquid ethylene at high pressures

A generalized equation of state for liquids at high pressures was proposed based on the Tait equation, and used to calculate the p-V-T data of liquid ethylene at high pressures of up to 130MPa in the temperature range of 120-220K. From the comparison of the calculating results with the data from literatures, it showed that this equation can be applied to describe the p-V-T behaviour of liquid ethylene at high pressures. The further tested results showed that this equation can find extended application in the higher pressure range of up to 500MPa.