SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2020, Vol. 28 ›› Issue (12): 2968-2976.DOI: 10.1016/j.cjche.2020.07.030

• Fluid Dynamics and Transport Phenomena • 上一篇    下一篇

Bubble size fractal dimension, gas holdup, and mass transfer in a bubble column with dual internals

Xiao Xu1, Junjie Wang1, Qiang Yang1,2, Lei Wang1, Hao Lu2, Honglai Liu3, Hualin Wang3   

  1. 1 School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China;
    2 National Engineering Laboratory for Industrial Wastewater Treatment, East China University of Science and Technology, Shanghai 200237, China;
    3 State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
  • 收稿日期:2019-10-30 修回日期:2020-06-08 出版日期:2020-12-28 发布日期:2021-01-11
  • 通讯作者: Qiang Yang
  • 基金资助:
    The authors wish to express their sincere gratitude to the National Natural Science Foundation of China (51678238, 51722806, 51608325, 21908057), National Key R&D Program of China (2018YFC1802704, 2018YFC1801904), China Postdoctoral Science Foundation funded project (2018M641942), and Shanghai Sailing Program (19YF1411800) for financial support.

Bubble size fractal dimension, gas holdup, and mass transfer in a bubble column with dual internals

Xiao Xu1, Junjie Wang1, Qiang Yang1,2, Lei Wang1, Hao Lu2, Honglai Liu3, Hualin Wang3   

  1. 1 School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China;
    2 National Engineering Laboratory for Industrial Wastewater Treatment, East China University of Science and Technology, Shanghai 200237, China;
    3 State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
  • Received:2019-10-30 Revised:2020-06-08 Online:2020-12-28 Published:2021-01-11
  • Contact: Qiang Yang
  • Supported by:
    The authors wish to express their sincere gratitude to the National Natural Science Foundation of China (51678238, 51722806, 51608325, 21908057), National Key R&D Program of China (2018YFC1802704, 2018YFC1801904), China Postdoctoral Science Foundation funded project (2018M641942), and Shanghai Sailing Program (19YF1411800) for financial support.

摘要: As the scale of residual oil treatment increases and cleaner production improves in China, slurry bubble column reactors face many challenges and opportunities for residual oil hydrogenation technology. The internals development is critical to adapt the long-term stable operation. In this paper, the volumetric mass transfer coefficient, gas holdup and bubble size in a gas-liquid up-flow column are studied with two kinds of internals. The gas holdup and volumetric mass transfer coefficient increase by 120% and 42% when the fractal dimension of bubbles increases from 0.56 to 2.56, respectively. The enhanced mass transfer processing may improve the coke suppression ability in the slurry reactor for residual oil treatment. The results can be useful for the exploration of reacting conditions, scale-up strategies, and oil adaptability. This work is valuable for the design of reactor systems and technological processes.

关键词: Gas-liquid reactor, Fractal dimension, Mass transfer, Bubble column

Abstract: As the scale of residual oil treatment increases and cleaner production improves in China, slurry bubble column reactors face many challenges and opportunities for residual oil hydrogenation technology. The internals development is critical to adapt the long-term stable operation. In this paper, the volumetric mass transfer coefficient, gas holdup and bubble size in a gas-liquid up-flow column are studied with two kinds of internals. The gas holdup and volumetric mass transfer coefficient increase by 120% and 42% when the fractal dimension of bubbles increases from 0.56 to 2.56, respectively. The enhanced mass transfer processing may improve the coke suppression ability in the slurry reactor for residual oil treatment. The results can be useful for the exploration of reacting conditions, scale-up strategies, and oil adaptability. This work is valuable for the design of reactor systems and technological processes.

Key words: Gas-liquid reactor, Fractal dimension, Mass transfer, Bubble column