【摘要】 在带有石英视窗的可变体积高压釜内 ,于 3 3 3 ,3 5 3 ,3 73和 3 93 K等 4个温度下 ,测定了 3 .0～1 5 .0 MPa范围内超临界 CO2 与碳酸二乙酯 ( DEC)二元体系的气 -液平衡数据 .结果表明 ,当温度恒定时 ,随着压力的增大 ,液相中超临界 CO2 的浓度急剧增大 ,气相中碳酸二乙酯的浓度缓慢增加 .根据实验结果推测出了体系的 pc,Tc,xc 和 Vc 等临界性质更多还原

【Abstract】 Vapor-liquid equilibrium data of the supercritical carbon dioxide+diethyl carbonate system were measured isothermally at 333, 353, 373 and 393 K in the pressure range of 3-15 MPa. The measurements were carried out in a cylindrical autoclave with a movable piston and an observed window. It is shown that the solubilities of supercritical CO 2 in DEC increase drastically with the increase of pressure at the given temperature, but the content of DEC in gas phase increase faintly. The critical values p c, T c, x c and V c of the binary system were predicted.更多还原