SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2013, Vol. 21 ›› Issue (2): 135-143.DOI: 10.1016/S1004-9541(13)60451-6

• 流体力学与传递现象 • 上一篇    下一篇

Enhancement of CO2 Absorption under Taylor Flow in the Presence of Fine Particles

蔡旺锋, 张娇, 张旭斌, 王燕, 齐向娟   

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • 收稿日期:2011-11-10 修回日期:2012-06-10 出版日期:2013-02-28 发布日期:2013-03-13
  • 通讯作者: QI Xiangjuan
  • 基金资助:

    Supported by the National Natural Science Foundation of China (20706041, 20876109), and the Natural Science Foundation of Tianjin, China (09JCYBJC06500).

Enhancement of CO2 Absorption under Taylor Flow in the Presence of Fine Particles

CAI Wangfeng, ZHANG Jiao, ZHANG Xubin, WANG Yan, QI Xiangjuan   

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
  • Received:2011-11-10 Revised:2012-06-10 Online:2013-02-28 Published:2013-03-13

摘要: The physical absorption of CO2 in water containing different types of particles was studied in a microchannel operated under Taylor flow. The maximum enhancement factors of 1.43-2.15 were measured for activated carbon (AcC) particles. The analysis shows that the enhancement effect can be attributed to the shuttle mechanism. Considering the separate contributions of mass transfer from bubble cap and liquid film, a heterogeneous enhancement model is developed. According to this model, the enhancement factors ECap, EFilm and EOv are mainly determined by mass transfer coefficient KL (KL,Cap and KL,Film), adsorptive capacity of particles m, and coverage fraction of particles at gas-liquid interface ζ. With both effects of particle-to-interface adhesion and apparent viscosity included, the model predicts the enhancement effect of AcC particles reasonably well.

关键词: enhancement factor, gas-liquid mass transfer, adsorptive particle, Taylor flow, microchannel

Abstract: The physical absorption of CO2 in water containing different types of particles was studied in a microchannel operated under Taylor flow. The maximum enhancement factors of 1.43-2.15 were measured for activated carbon (AcC) particles. The analysis shows that the enhancement effect can be attributed to the shuttle mechanism. Considering the separate contributions of mass transfer from bubble cap and liquid film, a heterogeneous enhancement model is developed. According to this model, the enhancement factors ECap, EFilm and EOv are mainly determined by mass transfer coefficient KL (KL,Cap and KL,Film), adsorptive capacity of particles m, and coverage fraction of particles at gas-liquid interface ζ. With both effects of particle-to-interface adhesion and apparent viscosity included, the model predicts the enhancement effect of AcC particles reasonably well.

Key words: enhancement factor, gas-liquid mass transfer, adsorptive particle, Taylor flow, microchannel