Experimental study of a trickle-bed reactor operating at high pressure: two-phase pressure drop and liquid saturation

Larachi, Faı̈çal; Laurent, André; Midoux, N.; Wild, Gabriel

doi:10.1016/0009-2509(91)85051-x

Cited by 177 publications

(154 citation statements)

References 12 publications

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“…They have shown reasonable agreement with the two-phase flow correlations of Ellman et al (1988Ellman et al ( , 1990, Larachi et al (1991aLarachi et al ( , 1991b, Holub et al (1992Holub et al ( , 1993 and Wammes et al (1991aWammes et al ( , 1991b. These results are shown in Table 2.…”

Section: The Fluid-fluid Interfacial Force Modelsupporting

confidence: 84%

“…Iliuta and Larachi (1999) used the same slip factors in Equation (17) for their calculations, but had an additional parameter for the distribution between liquid-full and dry slits. Table 1 shows the results of the generalized slit model compared to those of the relative permeability model (Sáez and Carbonell, 1985), the slit model with the slip factor correlations in Equation (17) and experimental correlations by Ellman et al (1988Ellman et al ( , 1990 and Larachi et al (1991a). Significant portions of the data used for comparison with these models are in the high-pressure and high-interaction regimes.…”

Section: The Slit Modelmentioning

confidence: 99%

“…This model is remarkable for having no adjustable parameters, and it provides a very good fit of holdup and pressure drop information. Ellman et al (1988,1990) 33 65 Larachi et al (1991aLarachi et al ( , 1991b . .…”

Section: The Fluid-fluid Interfacial Force Modelmentioning

confidence: 99%

“…However, only the models that are based on the fundamental equations for fluid flow offer the potential for modification to include more complex behavior associated with chemical reactions, mass transfer, phase change and energy transfer across fluid phases. TABLE 3 Mean absolute relative errors (%) calculated by Larachi et al (1999a) for holdup and pressure drop using various hydrodynamic models and correlations (trickle flow, all data) Ellman et al (1988,1990) 25 70 Larachi et al (1991a) 20 72…”

Section: The Fluid-fluid Interfacial Force Modelmentioning

confidence: 99%

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Multiphase Flow Models in Packed Beds

Carbonell

2000

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Modèles d'écoulements polyphasiques dans les lits garnis -Cette étude présente un examen des théories sur les écoulements des liquides et des gaz dans les lits garnis appliquées au dimensionnement des réacteurs. Des progrès significatifs ont été réalisés dans la connaissance des phénomènes d'écoulements polyphasiques dans les lits garnis et dans la possibilité d'effectuer des pré-visions quantitatives sur le comportement des fluides en écoulement. Certaines théories utilisent avec succès des équations de continuité et de quantité de mouvement moyennées dans l'espace pour les phases liquide et gazeuse, associées à des lois de comportement représentant les forces de traînée entre les phases fluides et les particules ainsi que les effets de la pression capillaire dans la colonne. Il en résulte un ensemble cohérent d'équations qui sont capables de modéliser les données expérimentales pour le taux de rétention du liquide et la perte de charge dans des conditions de régime permanent. Ces théories ont également été utilisées pour donner des informations sur la stabilité de ces écoulements permanents. Un accord remarquable a été trouvé entre les observations expérimentales et les prédictions théoriques sur les transitions entre les régimes à faibles et à fortes interactions. De plus, le même ensemble d'équa-tions a permis de modéliser les écoulements, à la fois en co-et en contre-courant, des phases liquide et gazeuse dans les lits garnis. Cette approche robuste est basée sur les principes fondamentaux de la méca-nique des fluides et peut être appliquée à d'autres configurations de réacteurs. Une formulation similaire a également amélioré la compréhension de l'hydrodynamique des réacteurs à gazosiphon. Certains de ces résultats sont présentés à titre de comparaison ; un résumé des challenges visant à élargir ces modèles hydrodynamiques pour y inclure les effets du transfert de chaleur, du transfert de masse et des vitesses de réaction est également proposé.Mots-clés : force de traînée, perméabilité, perte de charge, rétention, débits de transition, régime hydrodynamique. Abstract -Multiphase Flow Models in Packed Beds

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Section: The Fluid-fluid Interfacial Force Modelsupporting

confidence: 84%

Section: The Slit Modelmentioning

confidence: 99%

Section: The Fluid-fluid Interfacial Force Modelmentioning

confidence: 99%

Section: The Fluid-fluid Interfacial Force Modelmentioning

confidence: 99%

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Multiphase Flow Models in Packed Beds

Carbonell

2000

Oil & Gas Science and Technology - Rev. IFP

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“…These reactors can be used in the development of chemical processes such as catalytic hydrodesulfurization, production of calcium acid sulfite, oxidation of formic acid in water, synthesis of butynediol, production of sorbitol, hydrogenation of aniline to cyclohexylaniline and oxidation of sulfur dioxide on activated carbon (Larachi et al, 1991;Burghardt et al, 1990;Burghardt et al, 1995;Gianetto and Specchia, 1992;Latifi et al, 1997;Pawelec et al, 2001;Pironti et al, 1999;Rajashekharam et al, 1998;Wu et al, 1996;Reinecke et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Experimental analysis and evaluation of the mass transfer process in a trickle-bed reactor

Silva

Lima

Abreu

et al. 2003

Braz. J. Chem. Eng.

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-A transient experimental analysis of a three-phase descendent-cocurrent trickle-bed H 2 O/CH 4 -Ar/γ-Al 2 O 3 system was made using the stimulus-response technique, with the gas phase as a reference. Methane was used as a tracer and injected into the argon feed and the concentration vs time profiles were obtained at the entrance and exit of the bed, which were maintained at 298K and 1.013 10 5 Pa. A mathematical model for the tracer was developed to estimate the axial dispersion overall gas-liquid mass transfer and liquid-solid mass transfer coefficients. Experimental and theoretical results were compared and shown to be in good agreement. The model was validated by two additional experiments, and the values of the coefficients obtained above were confirmed.

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Hydrodynamics in a Pressurized Cocurrent Gas-Liquid Trickle-Bed Reactor: A Physical Model

Attou¹

1999

Chem. Eng. Technol.

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Using macroscopic mass and momentum balance equations applied to the gas and liquid phases, a physical model describing the hydrodynamics in a steady‐state pressurized cocurrent gas‐liquid trickle‐bed reactor is described. Current models in the literature use an adjustable parameter to fit the experimental data, whereas the model presented does not. Comparisons between the model data and experimental data are presented.

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Experimental study of a trickle-bed reactor operating at high pressure: two-phase pressure drop and liquid saturation

Cited by 177 publications

References 12 publications

Multiphase Flow Models in Packed Beds

Multiphase Flow Models in Packed Beds

Experimental analysis and evaluation of the mass transfer process in a trickle-bed reactor

Hydrodynamics in a Pressurized Cocurrent Gas-Liquid Trickle-Bed Reactor: A Physical Model

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