Elements of
Chemical Reaction Engineering
6th Edition



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Essentials of
Chemical Reaction Engineering
Second Edition

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Chapter 12: Steady-State Nonisothermal Reactor Design: Flow Reactors with Heat Exchange

Additional Homework Problems

CD12GA2

The liquid-phase reactions



are carried out in a perfectly insulated CSTR. The desired reaction is first order in A and zero order in B, while the undesired reaction is zero order in A and first order in B. The feed rate is equimolar in A and B. Species A enters the reactor at a temperature of 100°C and species B enters at a temperature of 50°C. The operating temperature of the reactor is 400 K. The molar flow rate of A entering the reactor is 60 mol/min : CPA = 20 cal/(mol K), CPB = 30 cal/(mol K), CPD = 50 cal/(mol K), and CPU = 40 cal/(mol K).



  1. What will be the exit molar flow rate of U and D from the reactor?

  2. What is the CSTR reactor volume for the conditions specified above?

  3. Is there a more effective way to maximize D? Explain. (Hint: Start with a mole balance on A. Outline your method before beginning any calculations).

[3rd Ed. P8-31]