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-HC

  The silicon compound described in Example CD12-3 is to be deposited on the large sheets separated by a distance d shown in Figure CDP12-E. The mass transfer correlation for flow across a flat plate varies along the length of the plate and is given by the expression
     
   

image 12eq7.gif

     
   

image 12eq7.gif
Figure CDP12-E

     
    (a) Derive an expression for the deposition thickness as a function of position.
(b) How would you suggest changing the parameters (e.g., d, U) or operating conditions to make the deposition thickness uniform?
(c) Suppose that a wire screen were placed a small distance S from the sheets so that the gas in that region was virtually stagnant. How would this addition affect the deposition thickness?

[2nd Ed. P11-21]