Extension of a Model for Bulk Crushing Strength of Spheres to Solid Catalysts of Different Shapes

The applicability of a model developed for the bulk crushing strength of spherical catalysts has been extended to differently shaped nonspherical catalysts such as extrudates. A broken percentage for a spherical catalyst and a percentage of fine particles for other shaped ones generated during the bulk crushing strength measurement are discussed and used as indices for strength. A good correlation has been obtained between the model-predicted values and the experimental results of differently shaped extruded catalysts. It has also been found that the slope factor in the model does not change with the size of the sieve; it is thus suggested that one group of data obtained with an appropriate sieve is informative for strength analysis.