Fevereiro 2015 vol. 1 num. 2 - XX Congresso Brasileiro de Engenharia Química

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CFD SIMULATIONS IN AN INTERNAL CIRCULATION AIRLIFT OPERATING UNDER HOMOGENEOUS REGIME

MONTEIRO, P. A. S. ; SELEGHIM JR, P. ;

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Abstract. Multiphase airlift reactors have been widely used for decades in chemical engineering, biochemical fermentation and wastewater treatment. The advantages of theses reactors include simple construction, an absence of moving parts, efficient mixing and mass transfer with low energy consumption per unit volume. The objective of the present work is to study, using CFD (Computational Fluid Dynamics) simulations, the hydrodynamics behaviors (liquid circulation velocity and gas holdup) in an internal circulation airlift reactor with air injection between the cylinders. In these simulations the conditions adopted were dispersed phase (gas) - air; continuous phase (liquid) – water; drag model – Grace; and different air superficial velocities (Ug). In the liquid phase, the turbulence can be described using the k-ε model. Through this study, it was possible to obtain useful and essential information about the design and operation of this equipment.

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DOI: 10.5151/chemeng-cobeq2014-0319-26024-174926

Referências bibliográficas
  • [1] CHISTI, Y. Air-Lift Bioreactors, ELSEVIER, NEW YORK, 1989.
  • [2] CHISTI, Y.; MOO-YOUNG, M. Gas hold up in pneumatic reactors. Chem. Eng. J., v. 38, p. 149-152, 1988.
  • [3] CHISTI, Y. Pneumatically agitated bioreactors in industrial and environmental bioprocessing: hydrodynamics, hydraulics, and transport phenomena. Appl. Mech. Rev., v.51, (1), p. 33–112, 1998.
  • [4] Área temática: Simulação, Otimização e Controle de Processos 7CHISTI, Y.; JAUREGUI-HAZA, U.J. Oxygen transfer and mixing in mechanically-agitated airlift bioreactors. Biochem. Eng. J., v. 10, p. 143-153, 2002.
  • [5] EBRAHIMIFAKHARI, M.; MOHSENZADEH, E.; MORADI, S.; MORAVEJI, M.; SALAMI, M. CFD simulation of the hydrodynamics in an internal air-lift reactor with two different configurations. Front. Chem. Sci. Eng., v.5, (4), p. 455–462, 2011.
  • [6] van BATEN, J.M.; KRISHNA, R. Comparison of Hydrodynamics and Mass Transfer in Airlift and Bubble Column Reactors Using CFD. Chem. Eng. Technol., v. 26, (10), p. 1074-1079, 2003.
  • [7] van BATEN, J.M.; ELLENBERGER,J.; KRISHNA, R. Hydrodynamics of internal air-lift reactors: experiments versus CFD simulations. Chem. Eng. Proc.,v. 42, p. 733-742, 2003.
  • [8] van BENTHUM, W.A.J.; van der LANS, R.G.J.M.; van LOOSDRECHT; HEIJNEN, J. J. Bubble recirculation regimes in an internal-loop airlift reactor. Chem. Eng. Sci., v. 54, p. 3995-4006, 1999 SIMCIK, M., MOTA, A., RUZICKA, M.C, VICENTE, A.; TEIXEIRA, J. CFD simulation and experimental measurement of gas holdup and liquid interstitial velocity in internal loop airlift reactor. Chem. Eng. Sci., v. 66, p. 3268–3279, 2011.
  • [9] WASEWAR, K.L; ANIL, M.; AGARWAL, V.K. CFD Modeling of Three-phase Bubble Column: 2. Effect of Design Parameters. Chem. Biochem. Eng. Q., v. 22, (2), p. 143–150, 2008.
  • [10] ZHANG, T.; WEI, C.; FENG, C.; ZHU, J. A novel airlift reactor enhanced by funnel internals and hydrodynamics prediction by the CFD method. Biores. Technol., v. 104, p. 600–607, 2012.
Como citar:

MONTEIRO, P. A. S.; SELEGHIM JR, P.; "CFD SIMULATIONS IN AN INTERNAL CIRCULATION AIRLIFT OPERATING UNDER HOMOGENEOUS REGIME", p. 11398-11405 . In: Anais do XX Congresso Brasileiro de Engenharia Química - COBEQ 2014 [= Blucher Chemical Engineering Proceedings, v.1, n.2]. São Paulo: Blucher, 2015.
ISSN 2359-1757, DOI 10.5151/chemeng-cobeq2014-0319-26024-174926

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