(718b) 3D CFD Simulation of Two-Phase Flow in a Rotating Packed Bed (RPB) for CO2 Capture: Sensitivity of Pressure Drop and Liquid Pool to Operating Conditions
AIChE Annual Meeting
Wednesday, November 17, 2021 - 8:25am to 8:50am
The aim of this study is to contribute to the understanding of the complex two-phase flow in a RPB in order to improve the design of CO2 capture facilities to reduce greenhouse gas emissions, in particular from industrial combustion flue gases.
Steady 3D CFD (Computational Fluid Dynamics) simulations were carried out using ANSYS® FLUENT® with a two-phase liquid-gas Eulerian approach. The packing is modeled as an isotropic porous bed zone. The liquid phase is assumed to be described as mono-sized droplets using an Euler-Euler modelling.
The previously developed CFD model  seems to reproduce properly the global features of the flow. Nevertheless, the range of the operating conditions has to be extended. In this work, the rotation speed (w), as well as the liquid mass flow rate (QL) and physical properties were varied to investigate the sensitivity of flow field, pressure drop and liquid pool at the bottom of the RPB (Figures 1 and 2).
Besides, different geometries were also compared.
 âMass Transfer in a Rotating Packed Bed: A Critical Reviewâ, Z. Wang, T. Yang, Z. Liu, S. Wang, Y. Gao, M. Wu, Chemical Engineering & Processing: Process Intensification, 139, 2019.
 P. BÃ©ard, V. Penin, P. Alix, "Towards 3D CFD simulation of two-phase flow in a rotating packed bed (RPB) for CO2 captureâ, CHISA (International Congress of Chemical and Process Engineering), virtually, 2021.