Comparison of continuous homogenous azeotropic and pressure-swing distillation for a minimum azeotropic system ethyl acetate/n-hexane separation

doi:10.1016/j.cjche.2018.02.002

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (10): 2023-2033.DOI: 10.1016/j.cjche.2018.02.002

• Separation Science and Engineering • Previous Articles Next Articles

Comparison of continuous homogenous azeotropic and pressure-swing distillation for a minimum azeotropic system ethyl acetate/n-hexane separation

Liping Lü^1,2, Lin Zhu¹, Huimin Liu¹, Hang Li¹, Shirui Sun²

1 Key Laboratory of Gas Process Engineering, School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China;
2 School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China

Received:2017-09-17 Revised:2018-01-27 Online:2018-11-14 Published:2018-10-28
Contact: Lin Zhu,E-mail addresses:250353343@qq.com,2224292239@qq.com
Supported by:
Supported by the Education Foundation of Chongqing (KJ1712307), the Application Technology Research and Developments Foundation of Fuling Technology Board (FLKJ, 2016ABA1026), and the Young Foundation of Yangtze Normal University (2015XJXM03).

Comparison of continuous homogenous azeotropic and pressure-swing distillation for a minimum azeotropic system ethyl acetate/n-hexane separation

Liping Lü^1,2, Lin Zhu¹, Huimin Liu¹, Hang Li¹, Shirui Sun²

1 Key Laboratory of Gas Process Engineering, School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China;
2 School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China

通讯作者: Lin Zhu,E-mail addresses:250353343@qq.com,2224292239@qq.com
基金资助:
Supported by the Education Foundation of Chongqing (KJ1712307), the Application Technology Research and Developments Foundation of Fuling Technology Board (FLKJ, 2016ABA1026), and the Young Foundation of Yangtze Normal University (2015XJXM03).

Abstract

Abstract: Continuous homogenous azeotropic distillation (CHAD) and pressure-swing distillation (PSD) are explored to separate a minimum-boiling azeotropic system of ethyl acetate and n-hexane. The CHAD process with acetone as the entrainer and the PSD process with the pressures of 0.1 MPa and 0.6 MPa in two columns are designed and simulated by Aspen Plus. The operating conditions of the two processes are optimized via a sequential modular approach to obtain the minimum total annual cost (TAC). The computational results show that the partially heat integrated pressure-swing distillation (HIPSD) has reduced in the energy cost and TAC by 40.79% and 35.94%, respectively, than the conventional PSD, and has more greatly reduced the energy cost and TAC by 62.61% and 49.26% respectively compared with the CHAD process. The comparison of CHAD process and partially HIPSD process illustrates that the partially HIPSD has more advantages in averting the product pollution, energy saving, and economy.

Key words: Continuous homogenous azeotropic distillation, Pressure-swing distillation, Ethyl acetate/n-hexane, Azeotrope

摘要： Continuous homogenous azeotropic distillation (CHAD) and pressure-swing distillation (PSD) are explored to separate a minimum-boiling azeotropic system of ethyl acetate and n-hexane. The CHAD process with acetone as the entrainer and the PSD process with the pressures of 0.1 MPa and 0.6 MPa in two columns are designed and simulated by Aspen Plus. The operating conditions of the two processes are optimized via a sequential modular approach to obtain the minimum total annual cost (TAC). The computational results show that the partially heat integrated pressure-swing distillation (HIPSD) has reduced in the energy cost and TAC by 40.79% and 35.94%, respectively, than the conventional PSD, and has more greatly reduced the energy cost and TAC by 62.61% and 49.26% respectively compared with the CHAD process. The comparison of CHAD process and partially HIPSD process illustrates that the partially HIPSD has more advantages in averting the product pollution, energy saving, and economy.

关键词: Continuous homogenous azeotropic distillation, Pressure-swing distillation, Ethyl acetate/n-hexane, Azeotrope

Liping Lü, Lin Zhu, Huimin Liu, Hang Li, Shirui Sun. Comparison of continuous homogenous azeotropic and pressure-swing distillation for a minimum azeotropic system ethyl acetate/n-hexane separation[J]. Chin.J.Chem.Eng., 2018, 26(10): 2023-2033.

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Comparison of continuous homogenous azeotropic and pressure-swing distillation for a minimum azeotropic system ethyl acetate/n-hexane separation

Comparison of continuous homogenous azeotropic and pressure-swing distillation for a minimum azeotropic system ethyl acetate/n-hexane separation

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