采用带有可视石英玻璃窗的高压汽液相平衡装置，测定了压力0.5～25MPa、温度265.15～333.15K条件下CO2异丙醚体系的二元汽液相平衡数据，并通过了热力学一致性检验。用Peng-Robinson(PR)状态方程对CO2-异丙醚体系的汽液相平衡数据进行关联，得到该方程的二元交互作用参数。结果表明，体系的汽液相平衡数据计算值与实验值偏差较小，可采用PR方程对CO2-异丙醚二组分物系的汽液相平衡数据进行预测。
Abstract
An experimental device incorporating vision windows, for measuring vapor-liquid equilibrium (VLE) data at high-pressures is described. Online-sampling of the vapor and liquid phases can be carried out by gas chromatography. The vapor-liquid equilibrium (VLE) data for the binary system carbon dioxide-diisopropyl ether have been measured at 265.15-333.15K and 0.5-2.5MPa. The experimental data set passed the thermodynamic consistency test. An isothermal correlation of the experimental data has been carried out based on the PengRobinson (PR) equation and the correlated results accord with the experimental data. The results show that the VLE data for the binary system carbon dioxide-diisopropyl ether can be calculated by the PR equation.
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