SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 53 ›› Issue (1): 83-88.DOI: 10.1016/j.cjche.2022.01.018

• Full Length Article • 上一篇    下一篇

An optimization method for enhancement of gas–liquid mass transfer in a bubble column reactor based on the entropy generation extremum principle

Chao Zhang1, Youzhi Liu1, Weizhou Jiao1, Hongyan Shen1, Xigang Yuan2, Shengkun Jia2   

  1. 1. Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051, China;
    2. State Key Laboratory for Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • 收稿日期:2021-11-29 修回日期:2022-01-13 出版日期:2023-01-28 发布日期:2023-04-08
  • 通讯作者: Chao Zhang,E-mail:zhangchao1213@nue.edu.cn;Xigang Yuan,E-mail:yuanxg@tju.edu.cn
  • 基金资助:
    This work is supported by the National Natural Science Foundation of China (91834303 and 22108261), the Open Foundation of State Key Laboratory of Chemical Engineering (SKL-ChE-19B02), Fundamental Research Program of Shanxi Province (20210302124618), and Scientific Technological Innovation Programs of Higher Education Institution in Shanxi (2020L0284).

An optimization method for enhancement of gas–liquid mass transfer in a bubble column reactor based on the entropy generation extremum principle

Chao Zhang1, Youzhi Liu1, Weizhou Jiao1, Hongyan Shen1, Xigang Yuan2, Shengkun Jia2   

  1. 1. Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051, China;
    2. State Key Laboratory for Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • Received:2021-11-29 Revised:2022-01-13 Online:2023-01-28 Published:2023-04-08
  • Contact: Chao Zhang,E-mail:zhangchao1213@nue.edu.cn;Xigang Yuan,E-mail:yuanxg@tju.edu.cn
  • Supported by:
    This work is supported by the National Natural Science Foundation of China (91834303 and 22108261), the Open Foundation of State Key Laboratory of Chemical Engineering (SKL-ChE-19B02), Fundamental Research Program of Shanxi Province (20210302124618), and Scientific Technological Innovation Programs of Higher Education Institution in Shanxi (2020L0284).

摘要: In this study, an optimization method is proposed to enhance the gas–liquid mass transfer in bubble column reactor based on the entropy generation extremum principle. The mass transfer–induced entropy generation can be maximized with the increase of mass transfer rate, based on which the velocity field can be optimized. The oxygen gas–liquid mass transfer is the major rate–limiting step of the toluene emissions biodegradation process in bubble column reactor, so the entropy generation due to oxygen mass transfer is used as the objective function, and the conservation equations of the gas–liquid flow and species concentration are taken as constraints. This optimization problem is solved by the calculus of variations, the optimal liquid flow pattern is obtained and the relationship of the maximum mass transfer enhancement on viscous dissipation is revealed, which can be used to improve the design of internal structure of the bubble column reactor.

关键词: Entropy generation, Bubble column reactor, Optimization, Biodegradation, Flow field

Abstract: In this study, an optimization method is proposed to enhance the gas–liquid mass transfer in bubble column reactor based on the entropy generation extremum principle. The mass transfer–induced entropy generation can be maximized with the increase of mass transfer rate, based on which the velocity field can be optimized. The oxygen gas–liquid mass transfer is the major rate–limiting step of the toluene emissions biodegradation process in bubble column reactor, so the entropy generation due to oxygen mass transfer is used as the objective function, and the conservation equations of the gas–liquid flow and species concentration are taken as constraints. This optimization problem is solved by the calculus of variations, the optimal liquid flow pattern is obtained and the relationship of the maximum mass transfer enhancement on viscous dissipation is revealed, which can be used to improve the design of internal structure of the bubble column reactor.

Key words: Entropy generation, Bubble column reactor, Optimization, Biodegradation, Flow field