Calculating osmotic pressure of liquid mixtures by association theory for sustainable separating of solvents by membrane processes
Calculating osmotic pressure of liquid mixtures by association theory for sustainable separating of solvents by membrane processes
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DOI：
10.1016/j.jiec.2022.01.035
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发表时间：
2022-02
影响因子：
6.1
通讯作者：
Hossein Jalaei Salmani;Hamed Karkhanechi;S. Jeon;H. Matsuyama
中科院分区：
文献类型：
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作者：
Hossein Jalaei Salmani;Hamed Karkhanechi;S. Jeon;H. Matsuyama
近年来，通过有机溶剂纳滤（OSN）、有机溶剂反渗透（OSRO）和有机溶剂正渗透（OSFO）实现的有机液体混合物的分离获得了很大的发展势头。在这些方法中，了解液体混合物的渗透压对于正确的工艺设计是特别重要的。虽然范特霍夫定律经常被用来估计这类混合物的渗透压，但可能会给结果增加前所未有的严重误差。在这项研究中，许多二元液体混合物的渗透压预测使用的原始定义的渗透压沿着立方加缔合（CPA）状态方程（EoS）和范特霍夫方程在不同的温度和组成。CPA EoS考虑了缔合化合物（具有氢键的化合物，如水和醇）中的氢键效应。结果表明，与Van't霍夫方程（平均偏差为19.95 bar）不同，CPA EoS对渗透压的原始定义（平均偏差为3.86 bar）能较好地预测所研究混合物的渗透压。我们的研究结果是有益的，在有机液体混合物的分离中使用的各种技术。
Recent years, the separation of organic liquid mixtures achieved by organic solvent nanofiltration (OSN), organic solvent reverse osmosis (OSRO), and organic solvent forward osmosis (OSFO) has gained a great momentum. In the methods, it is of particular importance to know the osmotic pressure of liquid mixtures for the correct process design. Although the Van’t Hoff law is frequently employed to estimate the osmotic pressure of such mixtures, unprecedented serious errors might be added to the results. In this study, the osmotic pressure of numerous binary liquid mixtures is predicted using the original definition of osmotic pressure along with the cubic plus association (CPA) equation of state (EoS) and the Van’t Hoff equation at various temperatures and compositions. CPA EoS considers hydrogen bonding effects in associating compounds (those with hydrogen bonds such as water and alcohols). The obtained results reveal that unlike the Van’t Hoff equation (the average deviation = 19.95 bar), the original definition of osmotic pressure with the aid of CPA EoS (the average deviation = 3.86 bar) can properly predict the osmotic pressure of the studied mixtures. Our findings are beneficial for various techniques utilized in the separation of organic liquid mixtures.