ABSTRACT
This chapter discusses general problems related to the kinetics of heterogeneous reactions under non-steady-state conditions associated with pulsed introduction of reactants into a catalyst bed. It considers the possibility of carrying out the process in both the pulsed and continuous modifications: for example, in a reactor with a moving catalyst bed. The chapter aims to show that the ideas expressed in discussing the chromatographic regime can serve as the basis for a new chemical technology. It also considers several examples of the use of chromatographic and gas chromatographic techniques for studying the mechanism of catalytic reactions. Ideal linear chromatography is a hypothetical chromatographic process that occurs under conditions of practically instantaneous adsorption equilibration with no dif-fusional hinderance whatsoever. The concept of a chromatographic regime was the stimulus for a number of investigations on ammonia synthesis in cyclic regimes with periodic changes in the composition of the feed.
