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
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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第7期1298-1302,MJ04,共6页
Chemical Journal of Chinese Universities
基金
天津大学"九八五"项目 (批准号 :K 0 90 70 )资助
关键词
超临界二氧化碳
碳酸二乙酯
高压相平衡
临界性质
High-pressure phase equilibrium
Diethyl carbonate
Supercritical CO 2
Critical properties
