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Article Dans Une Revue Chemical Engineering Science Année : 2022

In-depth analysis of reactive bubbly flow using two-way coupled spatio-temporal 1D model

Résumé

This work aims to investigate reactive bubbly flow using a comprehensive spatio-temporal 1D model. The work of Darmana et al. (2007) who conducted experimental and numerical study on CO2 chemisorption NaOH solution is used as the reference case. The gas-liquid hydrodynamics are well captured using a drift-flux loop model. During the transient process, bubble diameter d(b) shrinkage from 5.5 mm at the inlet to 3.7 mm at the outlet is captured by the 1D model. The pH evolution is also well predicted by the 1D model provided that appropriate closures are applied, including the recently proposed enhancement factor and reaction pathway by Krau beta & Rzehak (2017). An asymptotic 0D model is proposed to highlight the key parameters involved during the transient chemisorption process which are enhancement factor E, mass transfer coefficient k(L), and interfacial area a. Sensitivity analyses on liquid axial dispersion coefficient, enhancement factor and mass transfer coefficient are then performed to elucidate their impact on reactive mass transfer. As the process is controlled by interfacial mass transfer, the most important parameters are k(L) and d(b) description.
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Dates et versions

hal-03782701 , version 1 (21-09-2022)

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Vincent Ngu, Jérôme Morchain, Arnaud Cockx. In-depth analysis of reactive bubbly flow using two-way coupled spatio-temporal 1D model. Chemical Engineering Science, 2022, 261, ⟨10.1016/j.ces.2022.117963⟩. ⟨hal-03782701⟩
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