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This method is for determining the crush strength of spherical catalysts using a Chatillon motorized sample stand and force gauge, or tablet hardness tester. The method applies only to spherical particles having a nominal diameter of 1.6-mm (1/16-inch) or larger. The measurement range is from 250 Newtons (N) (56 lbf) down to 1 N (0.22 lbf). Test apparatus other than the Chatillon may be used provided comparable data can be obtained. For statistical purposes, the number of spheres crushed is set at a minimum of fifty; however, more may be specified.
Data generated using this method cannot be directly compared to those generated using UOP Method 914. This method will yield higher values for crush strength. Proper comparisons can only be made after tests are run to determine the offset between the two methods. Such offsets are expected to vary from product to product.