Sample Solutions for Isothermal Operating Conditions

In Table 4-4 sample solutions for the steady-state mass balances of CSTR and PFTR and the obtainable conversion in a SBR at the time of stoichiometric input amount are compiled. Isothermal, operation is assumed. The calculations refer to the following simple formal kinetic rate laws  

The equation given for the calculation of the conversion at the stoichiometric input point in a SBR for a second order reaction is an approximation derived by Hugo [47]. The solutions for the BR and the sfeady-state operated PFTR are identical for the reasons given when deducing the different mass balances. 

A closer examination of the different solutions shows that the conversion-time dependence for a second order stoichiometric reaction performed in a PFTR is identical with a first order reaction conducted in a CSTR. This can be explained by the different mixing patterns of the PFTR and the CSTR. 

A item of special information of relevance to all further elaborations can be obtained from the SBR concentration profiles. The largest non-reacted amount of added component A is accumulated at the time of stoichiometric input. In the example given, 

---