SCI和EI收录∣中国化工学会会刊

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 Lü1,2, Lin Zhu1, Huimin Liu1, Hang Li1, Shirui Sun2   

  1. 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 Lü1,2, Lin Zhu1, Huimin Liu1, Hang Li1, Shirui Sun2   

  1. 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: 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