CFD Modeling on Hydrodynamic Characteristics of Multiphase Counter-Current Flow in a Structured Packed Bed for Post-Combustion CO2 Capture

Yang, Li; Liu, Fang; Saito, Kozo; Liu, Kunlei

doi:10.3390/en11113103

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CFD Modeling on Hydrodynamic Characteristics of Multiphase Counter-Current Flow in a Structured Packed Bed for Post-Combustion CO₂ Capture

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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

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

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Center for Applied Energy Research, University of Kentucky, Lexington, KY 40511, USA

Authors to whom correspondence should be addressed.

Energies 2018, 11(11), 3103; https://doi.org/10.3390/en11113103

Received: 28 September 2018 / Revised: 26 October 2018 / Accepted: 7 November 2018 / Published: 9 November 2018

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Abstract

Solvent-based post combustion CO₂ 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 CO₂ 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. View Full-Text

Keywords: CO₂ capture; structured packing; CFD modeling; multiphase counter-current flow; hydrodynamics

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MDPI and ACS Style

Yang, L.; Liu, F.; Saito, K.; Liu, K. CFD Modeling on Hydrodynamic Characteristics of Multiphase Counter-Current Flow in a Structured Packed Bed for Post-Combustion CO₂ Capture. Energies 2018, 11, 3103. https://doi.org/10.3390/en11113103

AMA Style

Yang L, Liu F, Saito K, Liu K. CFD Modeling on Hydrodynamic Characteristics of Multiphase Counter-Current Flow in a Structured Packed Bed for Post-Combustion CO₂ Capture. Energies. 2018; 11(11):3103. https://doi.org/10.3390/en11113103

Chicago/Turabian Style

Yang, Li, Fang Liu, Kozo Saito, and Kunlei Liu. 2018. "CFD Modeling on Hydrodynamic Characteristics of Multiphase Counter-Current Flow in a Structured Packed Bed for Post-Combustion CO₂ Capture" Energies 11, no. 11: 3103. https://doi.org/10.3390/en11113103

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CFD Modeling on Hydrodynamic Characteristics of Multiphase Counter-Current Flow in a Structured Packed Bed for Post-Combustion CO₂ Capture

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