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Simple model for gas holdup and liquid velocity of annular photocatalytic external-loop airlift reactor under both bubble and developing slug flow

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Abstract

Based on the momentum conservation approach, a theoretical model was developed to predict the superficial liquid velocity, and a correlation equation was established to calculate the gas holdup of an annular external- loop airlift reactor(AELAR)in the bubble flow and developing slug flow pattern. Experiments were performed by using tap-water and silicone oil with the viscosity of 2.0 mm2/s(2cs-SiO)and 5.0 mm2/s(5cs-SiO)as liquid phases. The effects of liquid viscosity and flow pattern on the AELAR performance were investigated. The predictions of the proposed model were in good agreement with the experimental results of the AELAR. In addition, the comparison of the experimental results shows that the proposed model has good accuracy and could be used to predict the gas holdup and liquid velocity of an AELAR operating in bubble and developing flow pattern.

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Authors and Affiliations

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China

    Yiping Wang  (王一平), Weiqiang Chen  (陈为强), Qunwu Huang  (黄群武) & Jiahe Feng  (冯加和)

  2. Research Institute of Architectural Design & Urban Planning, Tianjin University, Tianjin, 300072, China

    Yong Cui  (崔 勇)

Authors
  1. Yiping Wang  (王一平)
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  2. Weiqiang Chen  (陈为强)
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  3. Qunwu Huang  (黄群武)
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  4. Jiahe Feng  (冯加和)
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  5. Yong Cui  (崔 勇)
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Corresponding author

Correspondence to Qunwu Huang  (黄群武).

Additional information

Supported by the National Natural Science Foundation of China(No. 51478297)and Program of Introducing Talents of Discipline(No. B13011).

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Wang, Y., Chen, W., Huang, Q. et al. Simple model for gas holdup and liquid velocity of annular photocatalytic external-loop airlift reactor under both bubble and developing slug flow. Trans. Tianjin Univ. 22, 228–236 (2016). https://doi.org/10.1007/s12209-016-2583-4

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  • DOI: https://doi.org/10.1007/s12209-016-2583-4

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