Phase Behavior of Supercritical CO2 Microemulsion with AOT and its Solubilization Properties of 1,3-propanediol
Phase Behavior of Supercritical CO2 Microemulsion with AOT and its Solubilization Properties of 1,3-propanediol
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DOI：
10.1080/01496395.2013.791854
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发表时间：
2013-05
影响因子：
2.8
通讯作者：
Wen Yu;Dan Zhou;Jianzhong Yin;Jin-ji Gao
中科院分区：
文献类型：
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作者：
Wen Yu;Dan Zhou;Jianzhong Yin;Jin-ji Gao
以1，3-PDO为模型化合物，AOT(2-乙基己基磺酸钠)为表面活性剂，乙醇为助溶剂，CO2/乙醇/1，3-PDO(1，3-丙二醇)三元体系、CO2/EtOH/H2O/1，3-PDO四元体系和AOT/CO2/EtOH/H2O/1，3-PDO五元体系为研究对象，在自制的变体积观察池中研究了三种微乳液体系在CO2连续相中的相行为。主要讨论了AOT/CO2/EtOH/H2O/1，3-PDO五元体系在29.1℃~44.3℃和6.41 Mpa~15.95 Mpa压力范围内的相行为。结果表明，通过控制操作压力和温度可以形成热力学稳定的微乳液，为工业设计提供了基本的热力学数据，并为从稀水溶液中选择性增溶1，3-PDO提供了合适的操作条件。
The phase behaviors of three microemulsion systems were studied in a custom-made volume-variable view cell, including the ternary system of CO2/EtOH (ethanol)/1,3-PDO (1,3-propanediol), quaternary system of CO2/EtOH/H2O/1,3-PDO and quinary system of AOT/CO2/EtOH/H2O/1,3-PDO, using 1,3-PDO as the model compound, AOT (sodium bis(2-ethylhexyl) sulfosuccinate) as surfactant and ethanol as co-solvent in the CO2 continuous phase. The phase behaviors of the AOT/CO2/EtOH/H2O/1,3-PDO quinary system were mainly discussed in the temperature range of 29.1°C–44.3°C and pressure range of 6.41 MPa-15.95 MPa. The result shows that a thermodynamically stable microemulsion can be formed by controlling the operating pressures and temperatures, which can provide basic thermodynamics data for industrial design and proper operating conditions for selectively solubilizing 1,3-PDO from dilute aqueous solution.