Question

4. (Adapted from H. S. Fogler, Elements of Chemical Reaction Engineering, 3rd ed., Prentice Hall, Upper Saddle River, NJ, 1999.) Pure butanol is fed into a semibatch reactor containing pure ethyl acetate to produce butyl acetate and ethanol in the reversible reaction:

CH,COOC2H5 + C4HgOH = CH3COOC4H 9 + C2H, OH
The reaction rate can be expressed in the Guldberg-Waage form. The reaction is carried out isothermally at 300 K. At this temperature, the equilibrium con- stant is 1.08 and the forward rate constant is 9.0 x 10 L (mol s) ’. Initially, there are 200 L of ethyl acetate in the reactor and butanol is fed at a rate of 0.050 L s ’. The feed and initial concentrations of butanol and ethyl acetate are 10.93 mol L and 7.72 mol L* , respectively.
(a) Plot the equilibrium conversion of ethyl acetate as a function of time.
(b) Plot the conversion of ethylacetate, the rate of reaction, and the concen- tration of butanol as a function of time.

Answer 1

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