Design of Packed Catalytic Reactors

Publisher Summary This chapter discusses the presently known methods for predicting the performance of nonisothermal continuous catalytic reactors and points out some of the problems that remain to be solved before a complete description of such reactors can be worked out. It focuses on packed catalytic reactors of the heat-exchanger type, in which a major requirement is that enough heat be transferred to control the temperature within permissible limits. To provide a logical framework for the discussion, an example is worked out to illustrate the methods used. There is no question of providing a recipe for designing nonisothermal reactors; methods of working that are useful are presented, and their application to a more or less typical problem is described. This chapter discusses a few reactors one of which is Adiabatic Reactor. Such a reactor with a regular flow pattern is much simpler to work with than one with exchange of heat. Except for resistance to ex- change of material and heat between fluid and catalyst, the space velocity is the only significant space variable. Conditions within a reactor are described with the help of numerical solutions of equations. The concept of a scale model of a reactor is useful because in some situations of practical importance it permits one to predict rather accurately the effects of changing certain design parameters of a reactor even though the kinetics of the reactions are not known, provided other parameters are changed in a corresponding way.

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