SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (8): 1745-1755.DOI: 10.1016/j.cjche.2018.10.004

• Fluid Dynamics and Transport Phenomena •     Next Articles

Numerical study of n-heptane/benzene separation by thermal diffusion column

Neda Hashemipour1, Javad Karimi-Sabet2, Kazem Motahari1, Saeed Mahruz Monfared3, Younes Amini4, Mohammad Ali Moosavian5   

  1. 1 Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak, Iran;
    2 Material and Nuclear Fuel Research School(MNFRS), Nuclear Science and Technology Research Institute, Tehran, Iran;
    3 Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran;
    4 Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran;
    5 School of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran
  • Received:2018-07-20 Revised:2018-09-03 Online:2019-11-16 Published:2019-08-28
  • Contact: Javad Karimi-Sabet

Numerical study of n-heptane/benzene separation by thermal diffusion column

Neda Hashemipour1, Javad Karimi-Sabet2, Kazem Motahari1, Saeed Mahruz Monfared3, Younes Amini4, Mohammad Ali Moosavian5   

  1. 1 Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak, Iran;
    2 Material and Nuclear Fuel Research School(MNFRS), Nuclear Science and Technology Research Institute, Tehran, Iran;
    3 Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran;
    4 Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran;
    5 School of Chemical Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran
  • 通讯作者: Javad Karimi-Sabet

Abstract: In this article, numerical simulations are performed to investigate the performance of the thermal diffusion column for the separation of n-heptane/benzene mixture. The present work tried to optimize column by analyzing significant parameters such as feed flow rate, temperature and cut. In order to obtain the hydrodynamic and temperature and mass distribution inside thermal diffusion column, computational fluid dynamic (CFD) method is applied to solve the Navier-Stocks equations. Numerical simulations are conducted to study the main parameters in both stationary and time-dependent conditions. By using the separation work unit as a function of cut, the optimal cut for maximum SWU occurs within a limited range of 0.47-0.5 for feed rate between 0.5 and 4·g min-1. Our findings reveal that the optimum feed rate in the range of optimum cut is about 1 g min-1. In transient study, results show that the best cut for reaching to steady-state condition is θ=0.5.

Key words: Thermal diffusion column (TDC), Computational fluid dynamic, Separative work unit, n-Heptane/benzene separation

摘要: In this article, numerical simulations are performed to investigate the performance of the thermal diffusion column for the separation of n-heptane/benzene mixture. The present work tried to optimize column by analyzing significant parameters such as feed flow rate, temperature and cut. In order to obtain the hydrodynamic and temperature and mass distribution inside thermal diffusion column, computational fluid dynamic (CFD) method is applied to solve the Navier-Stocks equations. Numerical simulations are conducted to study the main parameters in both stationary and time-dependent conditions. By using the separation work unit as a function of cut, the optimal cut for maximum SWU occurs within a limited range of 0.47-0.5 for feed rate between 0.5 and 4·g min-1. Our findings reveal that the optimum feed rate in the range of optimum cut is about 1 g min-1. In transient study, results show that the best cut for reaching to steady-state condition is θ=0.5.

关键词: Thermal diffusion column (TDC), Computational fluid dynamic, Separative work unit, n-Heptane/benzene separation