Collection of Czechoslovak Chemical Communications - digital archive 

Abstract

The results are summarized of mathematical modelling of the effect of internal diffusion on the rate of m-th order reaction taking place under non-isothermal conditions in the catalyst particle with tetralobed cross section. The effectiveness of the tetralobe-shaped extrudate is compared with that of cylindrical extrudate. The results obtained on the basis of mathematical modelling are confronted with the experimental data obtained on studying the dehydration reaction of cyclohexanol on cylindrical and tetralobed extrudates of gama-alumina under the conditions of influence of internal diffusion. The experimental data are in a qualitative agreement with the theoretical ones and confirm the higher effectiveness of shaped catalyst in comparison with the cylindrical extrudate catalyst.

Keywords: Effectiveness factor; Internal diffusion; Polylobe-shaped pellets; Cyclohexanol dehydration.