BATSEG, SEMISEG, COMPSEG - Mixing and Segregation in Chemical Reactors

6 BATSEG, SEMISEG, COMPSEG - Mixing and Segregation in Chemical Reactors 

Chemical reactions will take place only when the reactant molecules are in intimate contact. In some cases, especially with very fast reactions or viscous liquids, segregation of the reactants can exist, which make the reaction rates and 

Segregation may also be important if the reactants are fed to a reactor in an unmixed condition. This could be the case in any continuously fed reactor, either tubular (Fig. 5.133) or tank (Fig. 5.134). 

The intensity of segregation, I, can be described in terms of concentration fluctuations, as shown in Fig. 5.135. Here the time-varying fluctuations above and below an average value are shown. 

The unmixedness can be characterised by the mean of the square of the fluctuations or concentration variance, according to 

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