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CFD Modeling on Hydrodynamic Characteristics of Multiphase Counter-Current Flow in a Structured Packed Bed for Post-Combustion CO 2 Capture

Author

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  • Li Yang

    (Key Laboratory of Coal-Based CO2 Capture and Geological Storage, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
    School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China)

  • Fang Liu

    (Key Laboratory of Coal-Based CO2 Capture and Geological Storage, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
    School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China)

  • Kozo Saito

    (Department of Mechanical Engineering, College of Engineering, University of Kentucky, Lexington, KY 40506, USA)

  • Kunlei Liu

    (Department of Mechanical Engineering, College of Engineering, University of Kentucky, Lexington, KY 40506, USA
    Center for Applied Energy Research, University of Kentucky, Lexington, KY 40511, USA)

Abstract

Solvent-based post combustion CO 2 capture is a promising technology for industrial application. Gas-liquid interfaces and interactions in the packed bed are considered one of the key factors affecting the overall CO 2 absorption rate. Understanding the hydrodynamic characterizations within packed beds is essential to identify the appropriate enhanced mass transfer technique. However, multiphase counter-current flows in the structured packing typically used in these processes are complicated to visualize and optimize experimentally. In this paper, we aim to develop a comprehensive 3D multiphase, counter-current flow model to study the liquid/gas behavior on the surface of structured packing. The output from computational fluid dynamics (CFD) clearly visualized the hydrodynamic characterizations, such as the liquid distributions, wettability, and film thicknesses, in the confined packed bed. When the liquid We (Weber number) was greater than 2.21, the channel flow became insignificant and flow streams became more disorganized with more droplets at larger sizes. The portion of dead zones is decreased at higher liquid We , but it cannot be completely eliminated. Average film thickness was about 0.6–0.7 mm, however, its height varied significantly.

Suggested Citation

  • Li Yang & Fang Liu & Kozo Saito & Kunlei Liu, 2018. "CFD Modeling on Hydrodynamic Characteristics of Multiphase Counter-Current Flow in a Structured Packed Bed for Post-Combustion CO 2 Capture," Energies, MDPI, vol. 11(11), pages 1-14, November.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:11:p:3103-:d:181788
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    References listed on IDEAS

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    1. Li Yang & Fang Liu & Zhengchang Song & Kunlei Liu & Kozo Saito, 2018. "3D Numerical Study of Multiphase Counter-Current Flow within a Packed Bed for Post Combustion Carbon Dioxide Capture," Energies, MDPI, vol. 11(6), pages 1-14, June.
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    Cited by:

    1. Wen, Tao & Lu, Lin & He, Weifeng & Min, Yunran, 2020. "Fundamentals and applications of CFD technology on analyzing falling film heat and mass exchangers: A comprehensive review," Applied Energy, Elsevier, vol. 261(C).

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