SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (10): 2148-2152.DOI: 10.1016/j.cjche.2018.02.016

• Energy, Resources and Environmental Technology • Previous Articles     Next Articles

Comparative analysis of residence and diffusion times in rotating bed used for biogas upgrading

Liang Zhang1, Akiber Chufo Wachemo1,2, Hairong Yuan1, Yunzhi Pang1, Xiujin Li1   

  1. 1 Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
    2 Department of Water Supply and Environmental Engineering, Arba Minch University, P. O. Box 21, Arba Minch, Ethiopia
  • Received:2017-11-15 Revised:2018-01-29 Online:2018-11-14 Published:2018-10-28
  • Contact: Xiujin Li,E-mail address:xjli@mail.buct.edu.cn
  • Supported by:

    Supported by the Special Scientific Research Fund of Agricultural Public Welfare Profession of China (201303099).

Comparative analysis of residence and diffusion times in rotating bed used for biogas upgrading

Liang Zhang1, Akiber Chufo Wachemo1,2, Hairong Yuan1, Yunzhi Pang1, Xiujin Li1   

  1. 1 Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
    2 Department of Water Supply and Environmental Engineering, Arba Minch University, P. O. Box 21, Arba Minch, Ethiopia
  • 通讯作者: Xiujin Li,E-mail address:xjli@mail.buct.edu.cn
  • 基金资助:

    Supported by the Special Scientific Research Fund of Agricultural Public Welfare Profession of China (201303099).

Abstract: Rotating bed can be used in desorption operation of biogas upgrading as a new technology. For enough time to desorb, it is important to study the relationship between the residence time of liquid in rotating bed and the material diffusion time of liquid droplet in desorption process. By theoretical deduction, the exponential relation between residence time and liquid flow rate and rotational speed and kinematic viscosity is obtained. By analyzing the solution of nonlinear partial differential equation, the time law of material diffusion in the droplet is obtained. Moreover, by comparing the residence and diffusion times, the diffusion time can be within or out of residence time range, which has a direct relationship to rotational speed and liquid flow. By experiment, the comparison between residence and diffusion times is more realistic when the rotational speed is higher.

Key words: Rotating bed, Biogas upgrading, Desorption, Residence, Diffusion, Mass transfer

摘要: Rotating bed can be used in desorption operation of biogas upgrading as a new technology. For enough time to desorb, it is important to study the relationship between the residence time of liquid in rotating bed and the material diffusion time of liquid droplet in desorption process. By theoretical deduction, the exponential relation between residence time and liquid flow rate and rotational speed and kinematic viscosity is obtained. By analyzing the solution of nonlinear partial differential equation, the time law of material diffusion in the droplet is obtained. Moreover, by comparing the residence and diffusion times, the diffusion time can be within or out of residence time range, which has a direct relationship to rotational speed and liquid flow. By experiment, the comparison between residence and diffusion times is more realistic when the rotational speed is higher.

关键词: Rotating bed, Biogas upgrading, Desorption, Residence, Diffusion, Mass transfer