| 超临界CO2+碳酸二乙酯二元体系高压气-液相平衡 |
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| 引用本文： | 赵雪峰,陈丽,田宜灵,张凤才,薛源.超临界CO2+碳酸二乙酯二元体系高压气-液相平衡[J].高等学校化学学报,2004,25(7):1298-1302. |
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| 作者姓名： | 赵雪峰 陈丽 田宜灵 张凤才 薛源 |
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| 作者单位： | 天津大学理学院化学系,天津,300072 |
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| 基金项目： | 天津大学"九八五"项目(批准号: K09070)资助. |
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| 摘 要： | 在带有石英视窗的可变体积高压釜内,于333,353,373和393K等4个温度下,测定了3.0～15.0MPa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.
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| 关 键 词： | 高压相平衡 碳酸二乙酯 超临界二氧化碳 临界性质 |
| 文章编号： | 0251-0790(2004)07-1298-05 |
| 收稿时间： | 2003-08-26 |
High Pressure Vapour-liquid Equilibrium of Supercritical Carbon Dioxide+Diethyl Carbonate System |
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| ZHAO Xue-Feng,CHEN Li,TIAN Yi-Ling ,ZHANG Feng-Cai,XUE Yuan.High Pressure Vapour-liquid Equilibrium of Supercritical Carbon Dioxide+Diethyl Carbonate System[J].Chemical Research In Chinese Universities,2004,25(7):1298-1302. |
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| Authors: | ZHAO Xue-Feng CHEN Li TIAN Yi-Ling ZHANG Feng-Cai XUE Yuan |
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| Institution: | ZHAO Xue-Feng,CHEN Li,TIAN Yi-Ling *,ZHANG Feng-Cai,XUE Yuan |
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| 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. |
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| Keywords: | High-pressure phase equilibrium Diethyl carbonate Supercritical CO 2 Critical properties |
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