Simulation of high pure alcohol preparation by distillation-adsorption-membrane separation coupling process

被引：0
作者：
Li C. [1 ,2 ]
Cheng Y. [1 ]
Li H. [1 ,2 ]
机构：
[1] School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin
[2] National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization, Tianjin
来源：
Huagong Jinzhan/Chemical Industry and Engineering Progress | 2021年 / 40卷 / 03期
关键词：
Adsorption; Distillation; High pure alcohol; Membrane separation; Process simulation;
D O I：
10.16085/j.issn.1000-6613.2020-0850
中图分类号：
学科分类号：
摘要：
High pure alcohol is widely used in food, medicine, petrochemical, etc. The common method for the preparation of high concentration of alcohol is alcohol five-column distillation, but the traditional distillation process is often accompanied by high energy consumption and high cost. To solve the above problems, a new distillation-adsorption-membrane separation coupling process was proposed in this study to efficiently obtain high concentration alcohol from ethanol fermentation broth. Aspen Plus process simulation software was used to investigate the distillation-adsorption-membrane separation coupling process, and the sensitivity analysis tool was used to optimize the parameters of the distillation column. The results showed that the mass fraction of ethanol reached 99.2% and the ethanol recovery was 65.6% when the number of trays in the distillation column was 37, the reflux ratio was 9, the feeding position was the 35th tray, the adsorbent was natural zeolite and the membrane was separated by polyvinylidene fluoride pervaporation membrane. Compared with the traditional five-column distillation method, high pure alcohol can be obtained with low energy consumption and equipment cost. Meanwhile, the space utilization rate is also reduced. This study reveals that distillation-adsorption-membrane separation coupling process has a good industrial prospect. © 2021, Chemical Industry Press Co., Ltd. All right reserved.
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页码：1354 / 1361
页数：7
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