Collect. Czech. Chem. Commun.
1996, 61, 564-573
https://doi.org/10.1135/cccc19960564
Mass Transfer in Catalyst Particles of Non-Traditional Shape
Jiří Hanikaa, Natasha Dropkab and Milan Kubíčekc
a Department of Organic Technology, Prague Institute of Chemical Technology, 166 28 Prague 6, Czech Republic
b Faculty of Technology, University of Novi Sad, 21000 Novi Sad, Yugoslavia
c Department of Mathematics, Prague Institute of Chemical Technology, 166 28 Prague 6, Czech Republic
Abstract
The numerical solution of a system of partial differential equations describing the reacting component transfer in catalyst particles of non-traditional shapes, in extrudates of the starcat and starring types, facilitates the concept of concentration field in a catalyst and of the effectiveness factor of internal diffusion which determines the total reaction rate and thus the catalyst performance. The problem solution was carried out for the first-order reaction of infinite long extrudate and for the particles of star-shaped catalyst of finite length. The favourable effect was confirmed of the catalyst extrudate shaping on its performance as far as the rection takes place in the diffusion region.
Keywords: Effectiveness factor; Internal diffusion; Star-shaped pellets.
