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 sp herical catalysts has been extended to differently shaped nonspherical cata lysts such as extrudates. A broken percentage for a spherical catalyst and a percentage of fine particles for other shaped ones generated during the b ulk crushing strength measurement are discussed and used as indices for str ength. A good correlation has been obtained between the model-predicted val ues and the experimental results of differently shaped extruded catalysts. It has also been found that the slope factor in the model does not change w ith the size of the sieve; it is thus suggested that one group of data obta ined with an appropriate sieve is informative for strength analysis.