Experimental and simulation of the reactive dividing wall column based on ethyl acetate synthesis

doi:10.1016/j.cjche.2018.01.021

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (7): 1468-1476.DOI: 10.1016/j.cjche.2018.01.021

• Separation Science and Engineering • 上一篇下一篇

Experimental and simulation of the reactive dividing wall column based on ethyl acetate synthesis

Jiangwei Xie¹, Chunli Li^1,2, Fei Peng¹, Lihui Dong¹, Shuaiming Ma¹

1 School of Chemical Engineering & Technology, Hebei University of Technology, Tianjin 300130, China;
2 National-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, Tianjin 300130, China

收稿日期:2017-11-06 修回日期:2017-12-23 出版日期:2018-07-28 发布日期:2018-08-16
通讯作者: Chunli Li,E-mail address:lichunli_hebut@126.com
基金资助:
Supported by the Project funded by China Postdoctoral Science Foundation (2016M 590191) and the Key Basic Research Items in Application Basic Research Program of Hebei Province (16964502D).

Experimental and simulation of the reactive dividing wall column based on ethyl acetate synthesis

Jiangwei Xie¹, Chunli Li^1,2, Fei Peng¹, Lihui Dong¹, Shuaiming Ma¹

1 School of Chemical Engineering & Technology, Hebei University of Technology, Tianjin 300130, China;
2 National-Local Joint Engineering Laboratory for Energy Conservation of Chemical Process Integration and Resources Utilization, Tianjin 300130, China

Received:2017-11-06 Revised:2017-12-23 Online:2018-07-28 Published:2018-08-16
Contact: Chunli Li,E-mail address:lichunli_hebut@126.com
Supported by:
Supported by the Project funded by China Postdoctoral Science Foundation (2016M 590191) and the Key Basic Research Items in Application Basic Research Program of Hebei Province (16964502D).

摘要/Abstract

摘要： Reactive dividing wall column (RDWC) is a highly integrated unit which combines reaction distillation (RD) with dividing wall column separation technology into one shell, and it realized the chemical reaction and the separation of multiple product fractions simultaneously. In this paper, the reaction of esterification with acetic acid and ethanol to produce ethyl acetate was used as the research system, experiments and simulations of the RDWC were carried out. This system in the traditional process mostly used the homogeneous catalyst (e.g. sulfuric acid). However, in view of the corrosion of the equipment caused by the acidity of the catalyst, we used the heterogeneous catalysts - iron exchange resins - Amberlyst15 and proposed a novel catalyst loading method. Firstly, the reliability of the model of the simulation was verified by the experimental study on the change of liquid split ratio and reflux ratio. After that, the four-column model was established in Aspen Plus to analyze the effects of the amount of azeotropic agent, reflux ratio and acetic acid concentration. Finally, for a fair comparison, the economic analysis was conducted between traditional RD column and RDWC. The results showed that RDWC can save 34.7% of total operating costs and 18.5% of TAC.

关键词: Reactive dividing wall column, Catalyst loading method, Ethyl acetate, Simulation, Energy saving

Abstract: Reactive dividing wall column (RDWC) is a highly integrated unit which combines reaction distillation (RD) with dividing wall column separation technology into one shell, and it realized the chemical reaction and the separation of multiple product fractions simultaneously. In this paper, the reaction of esterification with acetic acid and ethanol to produce ethyl acetate was used as the research system, experiments and simulations of the RDWC were carried out. This system in the traditional process mostly used the homogeneous catalyst (e.g. sulfuric acid). However, in view of the corrosion of the equipment caused by the acidity of the catalyst, we used the heterogeneous catalysts - iron exchange resins - Amberlyst15 and proposed a novel catalyst loading method. Firstly, the reliability of the model of the simulation was verified by the experimental study on the change of liquid split ratio and reflux ratio. After that, the four-column model was established in Aspen Plus to analyze the effects of the amount of azeotropic agent, reflux ratio and acetic acid concentration. Finally, for a fair comparison, the economic analysis was conducted between traditional RD column and RDWC. The results showed that RDWC can save 34.7% of total operating costs and 18.5% of TAC.

Key words: Reactive dividing wall column, Catalyst loading method, Ethyl acetate, Simulation, Energy saving

Jiangwei Xie, Chunli Li, Fei Peng, Lihui Dong, Shuaiming Ma. Experimental and simulation of the reactive dividing wall column based on ethyl acetate synthesis[J]. Chinese Journal of Chemical Engineering, 2018, 26(7): 1468-1476.

Jiangwei Xie, Chunli Li, Fei Peng, Lihui Dong, Shuaiming Ma. Experimental and simulation of the reactive dividing wall column based on ethyl acetate synthesis[J]. Chin.J.Chem.Eng., 2018, 26(7): 1468-1476.

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Experimental and simulation of the reactive dividing wall column based on ethyl acetate synthesis

Experimental and simulation of the reactive dividing wall column based on ethyl acetate synthesis

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