Elements of
Chemical Reaction Engineering
6th Edition



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Essentials of
Chemical Reaction Engineering
Second Edition

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Chapter 18: Models for Nonideal Reactors

Example 18.1: Finding a two parameter model

The following F curve was obtained from a tracer test on a real reactor

Suggest a model consistent with the F curve.

(a)  What are the model parameters a and b?

(b)  What is the overall conversion for the second order reaction with CA0 = 2 mol/dm3 and k1 CA0 = 0.1 min–1?

 






Solution

The F curve is consistent with a step input.

  step tracer balance on CSTR gives

      Junction Balance

            nb = fraction of fluid that will be in the reactor a time 10 minutes or shorter, therefore nb = 0.33 no

  = t

For a 2nd Order Reaction

            CSTR                                               

            PFR

                                                                

                                                                       

                                                                        

                                                           

            CSTR                                     

                                                             

            Junction Balance

                                      

                                                                      

 


Back to Chapter 18