Solubility and RESS Experiments of Solid Solution in Supercritical Carbon Dioxide
Solubility and RESS Experiments of Solid Solution in Supercritical Carbon Dioxide
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DOI：
10.1252/jcej.30.293
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发表时间：
1997
影响因子：
0.8
通讯作者：
Guo-Tang Liu;Kunio Nagahama
中科院分区：
文献类型：
--
作者：
Guo-Tang Liu;Kunio Nagahama
蒽+菲混合物在整个组成范围内形成固溶体。在35℃、10.6 ~ 24.6 MPa范围内，测定了纯固体和固溶体混合物中蒽+菲在超临界二氧化碳中的溶解度。前者的溶解度数据用Peng-Robinson状态方程（PR EOS）拟合，后者的溶解度数据用PR EOS和固相Wilson方程进行关联。对纯蒽、纯菲和蒽+菲混合物进行了超临界溶液快速膨胀实验，研究了操作条件对固体形成的影响，重点研究了分离和形态。对于纯化合物的RESS，溶质浓度的降低会导致粒径的增大。操作条件对混合物几乎没有任何影响。含有蒽和菲的CO2溶液所产生的颗粒均为固溶体的均相结晶。这是根据光学显微照片和x射线衍射仪的观察证实的。大多数RESS实验在萃取温度为35℃，萃取压力为17.0 MPa的条件下进行。
An anthracene + phenanthrene mixture forms a solid-solution over the whole composition range. The solubility of anthracene + phenanthrene in supercritical carbon dioxide were measured for the mixture of pure solids and the solid solution at 35°C and between 10.6 and 24.6 MPa. The solubility data of the former were fitted by the Peng-Robinson equation of state (PR EOS), and those of the latter were correlated by the PR EOS and the Wilson equation for a solid phase.RESS (Rapid expansion from supercritical solution) experiments for pure anthracene, pure phenanthrene and the anthracene + phenanthrene mixtures were performed to study the influence of the operating conditions on the solid formation with emphasis on separation as well as morphology. In the case of RESS for pure compounds, a decrease in the solute concentration brought about an increase in particle size. Operating conditions have scarcely any influence for the mixtures. The particles produced from the CO2 solution containing anthracene and phenanthrene were all homogeneous crystals of the solid solution. It was confirmed on the based of observations by an optical microphotograph and an X-ray diffratometer. Most of the RESS experiments were carried out at an extraction temperature of 35°C and pressure of 17.0 MPa.