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Analysis of three-phase packed-bed reactors

✍ Scribed by Shigeo Goto; J. M. Smith


Publisher
American Institute of Chemical Engineers
Year
1978
Tongue
English
Weight
815 KB
Volume
24
Category
Article
ISSN
0001-1541

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✦ Synopsis


Abstract

Three‐phase reactors involving a solid catalyst are normally used for production of product or removal of impurity. Equations are presented for these two measures of reactor performance for a first‐order, reversible or irreversible reaction in an isothermal reactor. The results are presented in terms of dimensionless groups of the pertinent mass transfer, kinetic, and equilibrium (solubility) properties, and the gas and liquid flow rates. From the equations given, it is possible to predict the relative performance of concurrent (trickle bed) and countercurrent flow reactors and also the effect of mixing in the gas or liquid streams on performance.


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Most existing criteria for predicting the critical residence time (or jlow rate) at which runaway occurs in an adiabatic catalytic packed-bed reactor do not account for interphase heat-transfer resistance and intraparticle diffusion. When these transport limitations exist, the critical residence tim