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Modeling transient tracer studies in plug-flow reactors

1990; Elsevier BV; Volume: 123; Issue: 1 Linguagem: Inglês

10.1016/0021-9517(90)90153-b

1090-2694

John Happel, Éric Walter, Y. Lecourtier,

Zeolite Catalysis and Synthesis

The use of plug-flow reactors is common for kinetic studies in heterogeneous catalysis. Recently, transient tracing has been found to be advantageous in providing additional mechanistic information above that obtained by customary steady-state kinetics. Despite the advantages of transient tracing, it often suffers from incorrect data analysis in the case of plug flow because of failure to take into account the formalism needed to model plug-flow transient tracing as contrasted with that required to describe transient tracing in a gradientless recirculating reactor (CSTR). This paper presents a development of the appropriate differential equation system applying to plug-flow studies involving transient isotopic tracing superimposed on an overall steady-state kinetics. Closed mathematical expressions are presented for simple practical cases and used to illustrate important special characteristics of these systems.