Hydrodynamics of churn turbulent bubble columns: gas–liquid recirculation and mechanistic modeling

A phenomenological (mechanistic) model has been developed for describing the gas and liquid/slurry phase mixing in churn turbulent bubble columns. The gas and liquid phase recirculation rates in the reactor, which are needed as inputs to the mechanistic reactor model are estimated via a sub-model wh...

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Bibliographic Details
Published in:Catalysis today 2001-01, Vol.64 (3), p.253-269
Main Authors: Gupta, Puneet, Ong, Booncheng, Al-Dahhan, Muthanna H., Dudukovic, Milorad P., Toseland, Bernard A.
Format: Article
Language:English
Subjects:
Applied sciences
Catalysis
Catalytic reactions
Chemical engineering
Chemistry
Computational fluid dynamics
Computed tomography
Computerized tomography
Exact sciences and technology
Gas–liquid flow
Gas–liquid recirculation
General and physical chemistry
Hydrodynamics
Mass transfer
Mathematical models
Mechanistic reactor modeling
Navier Stokes equations
Radioactive particle tracking
Radioactive tracer studies
Radioactive tracers
Reactors
Slurry bubble column
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:A phenomenological (mechanistic) model has been developed for describing the gas and liquid/slurry phase mixing in churn turbulent bubble columns. The gas and liquid phase recirculation rates in the reactor, which are needed as inputs to the mechanistic reactor model are estimated via a sub-model which uses the two-fluid approach in solving the Navier–Stokes equations. This sub-model estimates the effective bubble diameter in the reactor cross-section and provides a consistent basis for the estimation of the volumetric mass transfer coefficients. The strategy for the numerical solution of the sub-model equations is presented along with the simulation results for a few cases. The overall reactor model has been tested against experimental data from radioactive gas tracer experiments conducted at the Alternate Fuels Development Unit (AFDU), La Porte, TX under conditions of methanol synthesis.
ISSN:0920-5861
1873-4308
DOI:10.1016/S0920-5861(00)00529-0