Flow modeling in a liquid – solid fluidized bed reactor
April 29, 2025
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| Article Title: | Flow modeling in a liquid – solid fluidized bed reactor |
| Authors: | Kechroud N., Hamaidi – Maouche N., Tighzert H., Deflaoui O., Bahdja H. |
| Affiliation: | Département Génie des Procédés, Faculté de Technologie, Laboratoire génie de l’environnement Université Abderrahmane MIRA Bejaia |
| Abstract: | The objective of the proposed work is to present a simple and efficient method of simulating the flow in a solid/liquid fluidized bed reactor The model system considered concerns the fluidization of glass beads (2 mm in diameter and 1554 kg . m-3 of density) by water in a glass column (High/internal diameter = 91/2 cm/cm. The experiments were carried out with repetitions for three flow rates: 5, 7 and 8.2 cm s-1 corresponding to the porosities of: 0.55, 0.64 and 0.69. The height of the fixed bed was set at 10 cm, and the water temperature was maintained at 20 ± 2°C. The shape of the measured RTD was characterized by three flow patterns: the Tanks in series model (TSM), the combination: plug flow reactor and stirred tank reactor in series (PFR + CSTR), and the dispersed plug flow model (DPFM). The comparison of the average residence time with the space time confirms the absence of dead zones in the fluidized bed. Based on the lowest Root Mean Square Error (RMSE), the dispersed plug flow model seems more representative in the case of low flow velocity, while at higher flow rates, the combined model is more suitable. The results also showed that the mixing was maximum for the porosity of 0.64, corresponding to the intermediate speed of 7cm s-1. |
| Keywords: | Fluidized bed, RTD, axial dispersion model, tanks in series model, variance, tracer. |
| *Correspondence: | Nassima Hamaidi – Maouche, Université Abderrahmane MIRA Bejaia, Faculté de Technologie, Département Génie des Procédés, Laboratoire génie de l’environnement Route Targua Ouzemmour Bejaia 06000 Algéri, email : nassima.maouche@univbejaia.dz |
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