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Optimum particle size in a gas-liquid-solid fluidized bed catalytic reactor

✍ Scribed by Keith D. Wisecarver; Liang-Shih Fan

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
954 KB
Volume
43
Category
Article
ISSN
0009-2509

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✦ Synopsis

The effect of particle size on the reactant conversion for a pseudo-first-order reaction in a gas-liquid-solid fluidized bed catalytic reactor is rigorously examined based on a comprehensive model developed in this study. The model takes into consideration inherent transport properties of the reactor including gas-liquid and liquid-solid mass transfer, axial liquid dispersion, solids mixing, and phase holdups. The reactant conversion predicted by the model exhibits a maximum with respect to particle size. which is shown to vary with process variables such as gas and liquid velocities, reaction rate constant, and intraparticle ditfusivity. The effect of solids mixing on conversion is shown to be insignificant for a wide range of process variables. Overall reaction rates in the fluidized-bed system are also compared to those predicted for a slurry bubble column utilizing a model based on sedimentation and dispersion of the solids.

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