Optimization study of pressure-swing distillation for the separation process of a maximum-boiling azeotropic system of water-ethylenediamine
Optimization study of pressure-swing distillation for the separation process of a maximum-boiling azeotropic system of water-ethylenediamine
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DOI：
10.1007/s11814-015-0100-4
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发表时间：
2015
影响因子：
2.7
通讯作者：
Alyssa Marie Fulgueras;Jeeban Poudel;Dong Sun Kim;Jung-ho Cho
中科院分区：
文献类型：
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作者：
Alyssa Marie Fulgueras;Jeeban Poudel;Dong Sun Kim;Jung-ho Cho
乙二胺（EDA）是一种难分离的有机溶剂，其混合物具有共沸性。研究了变压精馏分离共沸物的方法。对于最大沸点共沸物系，压力变化对共沸物系组成影响不大。但是，仍然通过工艺模拟来分析使用PSD的可行性。通过对水-EDA体系汽液平衡实验数据的研究，预测了热力学模型的适用性。本研究对每个精馏塔的设计参数进行了优化。对于每个PSD模拟案例，使用了低压和高压塔操作压力的不同组合。在确定了最佳操作压力后，进一步比较了低压-高压（LP+HP）和高压-低压（HP+ LP）两种塔结构。对屏蔽门系统进行热集成，以降低低温和高温公用工程的消耗。
The separation of ethylenediamine (EDA) from aqueous solution is a challenging problem because its mixture forms an azeotrope. Pressure-swing distillation (PSD) as a method of separating azeotropic mixture were investingated. For a maximum-boiling azeotropic system, pressure change does not greatly affect the azeotropic composition of the system. However, the feasibility of using PSD was still analyzed through process simulation. Experimental vaporliquid equilibrium data of water-EDA system was studied to predict the suitability of thermodynamic model to be applied. This study performed an optimization of design parameters for each distillation column. Different combinations of operating pressures for the low- and high-pressure columns were used for each PSD simulation case. After the most efficient operating pressures were identified, two column configurations, low-high (LP+HP) and high-low (HP+ LP) pressure column configuration, were further compared. Heat integration was applied to PSD system to reduce low and high temperature utility consumption.