| Prediction of Solid-Liquid Equilibrium for KCI in Mixed Water-Ethanol Solutions Using the LIQUAC Model |
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| 作者姓名： | 林阳政 李继定 曾楚怡 陈翠仙 |
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| 作者单位： | Department of Chemical Engineering, Tsinghua University, Beijing 100084, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China （No. 20276034）, the National Key Basic Research Development （973） Program of China （No. 2003CB615701）, and the National High-Tech Research and Development （863） Program of China （No. 2003AA328020） |
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| 摘 要： | The LIQUAC model is often used to predict vapor-liquid equilibria, osmotic coefficients, and mean ion activity coefficients for electrolyte systems. This paper describes a thermodynamic method to analyze solid-liquid equilibrium for electrolytes in mixed solvents solutions using the LIQUAC model. The KCI solubilities in mixed water-ethanol solutions are predicted with the LIQUAC model and its original interaction parameters. This method is also used to obtain new K^＋-ethanol interaction parameters in the LIQUAC model from the solubility data. The new interaction parameters accurately predict the vapor-liquid equilibrium data of K^＋ salts （including KCI, KBr, and KCOOCH3） in mixed water-ethanol solutions. The results illustrate the flexibility of the LIQUAC model which can predict not only vapor-liquid equilibrium but also solid-liquid equilibrium in mixed solvent systems.
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| 关 键 词： | 固液平衡 LIQUAC模型 K^＋盐 混合溶解 渗透系数 |
| 收稿时间： | 2004-10-08 |
| 修稿时间： | 2004-10-08 |
Prediction of Solid-Liquid Equilibrium for KCl in Mixed Water-Ethanol Solutions Using the LIQUAC Model |
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| Yangzheng Lin, &#x;&#x;, Jiding Li, îº, Chuyi Zeng, þ
&#x;,Cuixian Chen, &#x;þí.Prediction of Solid-Liquid Equilibrium for KCI in Mixed Water-Ethanol Solutions Using the LIQUAC Model[J].Tsinghua Science and Technology,2005,10(5):548-553. |
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| Authors: | Yangzheng Lin &#x;&#x; Jiding Li îº Chuyi Zeng þ
&#x; Cuixian Chen &#x;þí |
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| Institution: | Department of Chemical Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | The LIQUAC model is often used to predict vapor-liquid equilibria, osmotic coefficients, and mean ion activity coefficients for electrolyte systems. This paper describes a thermodynamic method to analyze solid-liquid equilibrium for electrolytes in mixed solvents solutions using the LIQUAC model. The KCl solubilities in mixed water-ethanol solutions are predicted with the LIQUAC model and its original interaction parameters. This method is also used to obtain new K+-ethanol interaction parameters in the LIQUAC model from the solubility data. The new interaction parameters accurately predict the vapor-liquid equilibrium data of K+ salts (including KCl, KBr, and KCOOCH3) in mixed water-ethanol solutions. The results illustrate the flexibility of the LIQUAC model which can predict not only vapor-liquid equilibrium but also solid-liquid equilibrium in mixed solvent systems. |
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| Keywords: | LIQUAC model solid-liquid equilibrium K+ salts mixed solvents |
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