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

doi:10.1016/S1004-9541(13)60451-6

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

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

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

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/Abstract

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 E_Cap, E_Film and E_Ov are mainly determined by mass transfer coefficient K_L (K_L,Cap and K_L,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 E_Cap, E_Film and E_Ov are mainly determined by mass transfer coefficient K_L (K_L,Cap and K_L,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

蔡旺锋, 张娇, 张旭斌, 王燕, 齐向娟. Enhancement of CO₂ Absorption under Taylor Flow in the Presence of Fine Particles[J]. Chinese Journal of Chemical Engineering, 2013, 21(2): 135-143.

CAI Wangfeng, ZHANG Jiao, ZHANG Xubin, WANG Yan, QI Xiangjuan. Enhancement of CO₂ Absorption under Taylor Flow in the Presence of Fine Particles[J]. Chin.J.Chem.Eng., 2013, 21(2): 135-143.

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

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

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