# HW 6 - CHE4473 Kinetics Spring 2016 Homework N6 Reactor...

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CHE4473 Kinetics Spring 2016 Homework N°6: Reactor design as a Function of molar flow rates (Ch. 6) Due: Tuesday March 1 st 2016 1. Variable density. Re-do Problem 5.1 (from last week) but now solve it numerically, as a function of F A , F I , and F B . In this case, you can give any arbitrary numbers to V R , C A0 , F A0 , and v 0 (let’s say all = 1.0), since they will be the same for each reactor to obtain k and then solve for X A at the exit of the CSTR. The original statement was: The gas-phase irreversible and first-order reaction A è 3B is carried out in a PFR, where the feed is equal molar of A and inerts. The conversion under these circumstances is 50 %. The exit from the PFR is fed to a CSTR of the same volume as the PFR under the same P and T conditions. What is the conversion exiting the CSTR? Compare with your answer of Problem 5.1. The two methods should give the same answer. 2. Membrane reactor. An aromatic compound A undergoes reversible dehydrogenative coupling (2 A ⇋ AA + H 2 ) in an isothermal PFR. Pure A is fed to the reactor in the gaseous phase at the reaction temperature. Equilibrium is

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