HW+6+rev3

HW+6+rev3 - Chemical Engineering 142 Homework Set #6 100...

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Chemical Engineering 142 Homework Set #6 100 points total Due Wednesday, March 3, 2010 Problem 1 (20 points) The following elementary, liquid phase reaction A B is carried out in an isothermal PFR with a recycle stream. If the conversion of A is 0.75 when the recycle ratio (R = v r /v f ) is 0.5, determine the conversion when the recycle stream is shut off. Problem 2 (10 points) The thermal decomposition of isopropyl isocyanate (A) was studied in a differential, lab- scale reactor. Use the following data to determine the order of the reaction in A, the activation energy, and the pre-exponential factor. Hint: plot the data in such a way that activation energy can be determined by guessing an order with respect to species A, and continue this guessing process until a linear Arrhenius plot is obtained to calculate both activation energy and order with respect to species A. Run Rate (mol L -1 s -1 ) C A (mol L -1 ) Temperature (K) 1 4.9 x 10 -4 0.2 700 2 1.1 x 10 -4 0.02 750 3 2.4 x 10 -3 0.05 800 4 2.2 x 10 -2 0.08 850 5 1.18 x 10 -1 0.1 900
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Problem 3 (20 points) Consider the following reversible, elementary gas-phase reaction:
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HW+6+rev3 - Chemical Engineering 142 Homework Set #6 100...

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