ExxonMobil Research and Engineering Company 1 article published in JoVE Engineering Predicting Catalyst Extrudate Breakage Based on the Modulus of Rupture Jean W. L. Beeckman1, Natalie A. Fassbender1, Theodore E. Datz1, Majosefina Cunningham1, Dana L. Mazzaro1 1Process Technology Department, Catalyst Technology Division, ExxonMobil Research and Engineering Company Here we present a protocol to measure the modulus of rupture of an extruded catalyst and the breakage of said catalyst extrudates by collision against a surface or by compression in a fixed bed.