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超临界CO2+CH3OH及C2H5OH二元系的气液平衡
Studies on Vapor-liquid Phase Equilibria for SCF CO2+CH3OH and SCF CO2+C2H5OH Systems
【摘要】 在带有石英可视窗和内搅拌的可变体积高压釜内 ,测定了超临界 CO2 +CH3OH及 C2 H5OH两个系统的相平衡数据 ,温度为 5 0～ 2 0 0℃ ,压力 4.0～ 1 6.0 MPa.利用从硬球模型得出的适用于高压高温的状态方程 ,计算了这两个系统的临界曲线 ,并与实验值进行比较 .
【Abstract】 Vapor liquid equilibrium data for SCF CO 2+methanol mixtures at 50, 100, 150 and 200 ℃ and for SCF CO 2+ethanol mixtures at 60, 80, 140 and 180 ℃ have been measured. The pressure in the experiments ranged from 4.0 to 16.2 MPa. The measurements were carried out in a cylindrical autoclave with a moveable piston and a window for observation. The results of compositions of the two coexisting phases are given and shown as p x diagrams. We have correlated phase equilibrium data with the equation of state(a repulsion term, Carnahan Starling One Fluid, an attraction term, Square Well Pade Approximant). The calculated results agree fairly with the experimental data.
【Key words】 Phase equilibrium； Methanol； Ethanol； Supercritical fluid； Binary mixture； Equation of state；
- 【文献出处】 高等学校化学学报 ,Chemical Research In Chinese Universities , 编辑部邮箱 ,2002年08期
- 【分类号】O642
- 【被引频次】34
- 【下载频次】238