Examples Illustrating Use of Multi-mode Homogeneous Reactor Models

Examples Illustrating Use of Multi-mode Homogeneous Reactor Models 

In this section, we present examples to illustrate the usefulness of multi-mode homogeneous reactor models in predicting micromixing effects on yield and selectivity, reactor runaway, etc. 

Single Bimolecular Reaction in a Tubular Reactor Mixing Effects on Conversion  

In order to examine the effects of differences in mixing times on conversion, we solve Eqs. (247)-(250) for a wide range of values of k, where k — r A/r tt(— D/jm/D lm) is the ratio of the mixing times of A and B. The results, which have been plotted in Fig. 12, enable us to capture solely the effects of differences in transport properties (i.e. species diffusivities) on product formation. It may be noted from Fig. 12, that conversion attains a maximum at k — 1 because for the case of premixed feed, the two species A and B are interchangeable and the curves are therefore symmetric about k — 1. 

In order to capture the effects of non-uniform reactant feeding at the reactor entrance, we rederive our two-mode models by introducing a delta function source in the species balance equation for the y th species [Eq. (123)] 

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F. Examples Illustrating Use of Multi-mode Homogeneous Reactor Models 260... 

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