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Effectiveness factors of nth order kinetics in trickle-bed reactors

โœ Scribed by S. Goto; A. Lakota; J. Levec

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
336 KB
Volume
36
Category
Article
ISSN
0009-2509

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โœฆ Synopsis

In trickle-bed reactors conventional solutions of effectiveness factors are not applicable because parts of the external catalyst surface may be covered by liquid and others by gas. In this paper approximate solutions of effectiveness factors are systematically compared with numerical solutions for a sphere model with symmetrical boundary conditions and (n^{\text {th }}) order kinetics. The finite difference method with successive-over-relaxation is adopted for the computations. Comparison of the results indicates that simple approximate overall effectiveness factors give good results for both linear and nonlinear kinetics.

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The effectiveness factors for a second-order reaction kinetics for two wetted geometries, polar wetted and uniformly wetted, in a trickle-bed reactor were investigated. The numerical solutions obtained by using the orthogonal collocation method indicated that a large difference in effectiveness fact