Elements of
Chemical Reaction Engineering
6th Edition



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Essentials of
Chemical Reaction Engineering
Second Edition

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Chapter 13: Unsteady State Nonisothermal Reactor Design

Professional Reference Shelf

R13.6 Adiabatic Operation of Batch Reactors

 

    For adiabatic operationimage 09eq4.gifand when the work done by the stirrer can be neglectedimage 09eq5.gif  
       
   

image 09eq6.gif

(13-13)
       
    whereimage 09eq7.gifAn analytical solution relating X and T can be found for the case of constant or mean heat capacity.  
       
   

image 09eq8.gif

(13-15)
     
    multiplying by dt, separating variables and integrating between the initial conditions, X = 0 and T =T0, and later conditions X =X and T =T, yields  
       
   

image 09eq9.gif

 
       
    Taking the antilog, we have  
       
   
image 09eq10.gif
 
       
    solving for X yields  
       
   
image 09eq11.gif
 
       
    Then  
       
   
image 09eq12.gif
(13-16)
       
    This form is the same as the equation relating X and T derived for flow reactors. Rearranging yields  
       

Temperature
conversion
relationship for
an adiabatic batch
reactor

 
image 09eq13.gif
(13-17)