Established statistical techniques are used to determine the constants in a large number of kinetic models for catalytic reactions, so that the models adequately fit isothermal rate data. Then an attempt is made to devise new kinds of experiments which could be used to distinguish between the initially acceptable models and would provide additional information for scale-up. Because of the differences in the structures of the models, decisions among them can be expected on the basis of experiments conducted adiabatically and on the optimal temperature profile in the reactor. © 1969, American Chemical Society. All rights reserved.