Elements of
Chemical Reaction Engineering
6th Edition



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Essentials of
Chemical Reaction Engineering
Second Edition

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Chapter 15: Diffusion and Reaction in Porous Catalysts

Additional Homework Problems

CDP15-AB

  The elementary gas-phase reaction
     
   

image 12eq1.gif

     
    is carried out in a packed-bed reactor. A stoichiometric mixture of A and B enters the reactor at a total molar flow rate of 10 g mol/min, a temperature of 400 K, and a pressure of 20 atm. Currently, 1000 kg of catalyst measuring 1.5 mm in diameter is used to achieve 0.05 conversion with an exiting pressure of 19 atm. In an effort to increase conversion, data were taken correlating the diameter and effectiveness factor of the catalyst pellet. Use the data below to determine the catalyst size that gives the highest conversion. Flow is completely turbulent throughout the bed.
     
     
    Additional Information:
   

image 12eq2.gif