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Li, Wen-Ling; Liang, Hong-Wei; Feng, Zi-Sheng; Si, Cong-Cong; Shao, Lei; Chu, Guang-Wen; Xiang, Yang
Chemical engineering and processing, June 2024, 2024-06-00, Volume: 200Journal Article
•The 3D numerical model for simulating the CO2 physical absorption in the entire RPB was established.•The predicted CO2 saturation rates by CFD simulations were close to the experimental data.•The effects of operational parameters on gas-liquid mass transfer in RPB were analyzed. The rotating packed bed (RPB), a process intensification equipment, has been widely studied and applied to chemical engineering processes such as gas absorption, nanomaterial preparation, and polymer devolatilization. In this study, we presented a typical RPB model to study the intensification mechanism of high gravity on gas-liquid mass transfer. Based on this, three-dimensional computational fluid dynamics (CFD) simulations and experiments of CO2 physical absorption were conducted to investigate the gas-liquid mass transfer characteristics in the RPB. The predicted and experimental values of CO2 saturation rates of the liquid phase showed good agreement, and the errors were within ± 15 % under various operating conditions. Moreover, detailed flow field and mass transfer information that are difficult to measure experimentally, such as the distribution of CO2 mass fraction in the liquid, liquid holdup, turbulent kinetic energy dissipation rate, and gas-liquid interfacial area, were analyzed by CFD simulation results. These results provide a solid foundation for the further development and application of RPB. Display omitted
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