Steady-state transport in diluted catalysts
Article first published online: 17 JUN 2004
Copyright © 1982 American Institute of Chemical Engineers
Volume 28, Issue 5, pages 747–751, September 1982
How to Cite
Neogi, P. (1982), Steady-state transport in diluted catalysts. AIChE J., 28: 747–751. doi: 10.1002/aic.690280507
- Issue published online: 17 JUN 2004
- Article first published online: 17 JUN 2004
- Manuscript Accepted: 13 OCT 1981
- Manuscript Revised: 14 SEP 1981
- Manuscript Received: 2 MAR 1981
The transport in composite media obtained by dispersing a porous active catalyst inside an inert porous medium has been considered here. Since such systems show a wide variety of advantages, it is necessary to obtain the correct transport equations. Very dilute systems are considered (volume fraction of catalysts ≪ 1/3), a condition that any one dispersed catalyst microsphere cannot feel the influence of others arises. An averaged conservation equation at steady state is obtained under the above condition as well as the condition that any one microsphere can be randomly placed in the medium. Similarly, an effective diffusion coefficient has been obtained.
The results differ from the ones previously in use. The enhancement in the reaction rate on diluting a catalyst is seen to be much less than the values previously suggested although a qualitative similarity exists.