Three-phase CFD-model for trickle bed reactors

Elena Gorshkova (Corresponding Author), Mikko Manninen, V. Alopaeus, H. Laavi, J. Koskinen

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Comprehensive CFD-model for reactive flow of gas and liquid in porous catalyst beds was developed and numerically tested. The three phase trickle-bed process involving both gas and liquid phases and the fixed bed of porous catalyst particles includes hydrodynamic forces, mechanical and capillary dispersion, and wetting efficiency.

In the present work, the model was extended to include reactions, mass transfer and heat transfer. The stationary gas and liquid inside the porous particles were modeled separately from the bulk gas and liquid phases flowing outside the particles, with convective and diffusive mass transfer between the inner and outer fluids. Reactions were assumed to take place inside the catalyst particles. The process modeled in this work was the hydrogenation of octene in Ni/Al2O3 reactor. The reaction is highly exothermic resulting in evaporation and condensation of the components.

All submodels were implemented in Fluent software. Numerical tests were carried out to show that the CFD model allows the investigation of local variations in the reactor, caused for example by bed drying or the effects of irregular liquid feed.
Original languageEnglish
Pages (from-to)397-404
Number of pages7
JournalInternational Journal of Nonlinear Sciences and Numerical Simulation
Volume13
Issue number6
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Fingerprint

charge flow devices
Reactor
beds
Computational fluid dynamics
reactors
Liquid
Catalyst
Liquids
catalysts
Catalysts
mass transfer
Mass Transfer
liquid phases
Mass transfer
liquids
Gases
vapor phases
gases
Model
drying

Keywords

  • CFD model
  • three phase flow
  • trickle bed

Cite this

Gorshkova, Elena ; Manninen, Mikko ; Alopaeus, V. ; Laavi, H. ; Koskinen, J. / Three-phase CFD-model for trickle bed reactors. In: International Journal of Nonlinear Sciences and Numerical Simulation. 2012 ; Vol. 13, No. 6. pp. 397-404.
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Three-phase CFD-model for trickle bed reactors. / Gorshkova, Elena (Corresponding Author); Manninen, Mikko; Alopaeus, V.; Laavi, H.; Koskinen, J.

In: International Journal of Nonlinear Sciences and Numerical Simulation, Vol. 13, No. 6, 2012, p. 397-404.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Manninen, Mikko

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AU - Laavi, H.

AU - Koskinen, J.

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AB - Comprehensive CFD-model for reactive flow of gas and liquid in porous catalyst beds was developed and numerically tested. The three phase trickle-bed process involving both gas and liquid phases and the fixed bed of porous catalyst particles includes hydrodynamic forces, mechanical and capillary dispersion, and wetting efficiency.In the present work, the model was extended to include reactions, mass transfer and heat transfer. The stationary gas and liquid inside the porous particles were modeled separately from the bulk gas and liquid phases flowing outside the particles, with convective and diffusive mass transfer between the inner and outer fluids. Reactions were assumed to take place inside the catalyst particles. The process modeled in this work was the hydrogenation of octene in Ni/Al2O3 reactor. The reaction is highly exothermic resulting in evaporation and condensation of the components.All submodels were implemented in Fluent software. Numerical tests were carried out to show that the CFD model allows the investigation of local variations in the reactor, caused for example by bed drying or the effects of irregular liquid feed.

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