✦ LIBER ✦

Mass-transfer enhancement and reaction-rate limitations in solid-liquid phase-transfer catalysis

✍ Scribed by J.B. Melville; J.D. Goddard

Publisher: Elsevier Science
Year: 1985
Tongue: English
Weight: 767 KB
Volume: 40
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(85)85122-8

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✦ Synopsis

We present an analysis of mass transfer in solid-liquid phase-transfer catalysis (SLPTC), obtaining analytical solutions for the stagnant-film model and numerical solutions to the complete transport equations for the von K&-m&n rotating-disk flow. The latter is viewed as a prime candidate for experimental studies on SLPTC. A catalyst-effectiveness plot is developed, which displays both mass-transfer enhancement and reactionrate limitation associated with the two distinct Damkiihler parameters for the bulk and surface reactions. Solutions are obtained from the iihn model for pseudo-first-order reaction and for rapid equilibrium reaction, including irreversible reaction with flame-like reaction fronts. Comparison of stagnant-film model against the numerical solutions for the rotating disk shows generally good agreement, as one would expect for uniformly accessible surfaces.

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