Elements of
Chemical Reaction Engineering
6th Edition



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Essentials of
Chemical Reaction Engineering
Second Edition

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Chapter 8: Multiple Reactions

Additional Homework Problems

CDP8-JC

    The oxidation of propylene (P) to acrolein (A) is carried out in a fluidized-bed reactor. The reactions taking place are [Chem. Eng. Sci., 51, 2189 (1996)]:  
       
   

 
       
    Air and acrolein are fed to the reactor. The rate laws for the reaction (i= 1, 2, 3) are  
       
   

IMAGE 06eq26.gif

 
       
k i(appropriate units) k a
k1

 k2

 k3
Frequency factor 4 x 10 4 688 3.5 x 10 -4 32.8
Activation energy (kJ/mol) 88,000 77.500 1312 72,630
       
    The reaction is carried out isothermally. Plot the selectivity of acrolein as a function of temperature and feed composition.