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Problem 2 : Production of cumene You are going to produce cumene from propylene and benzene using the elementary, reversible gas phase reaction: C 3

Problem 2: Production of cumene
You are going to produce cumene from propylene and benzene using the elementary,
reversible gas phase reaction:
C3H6+C6H6harrC9H12
which as forward and reverse rate constants of kf and kr, respectively. The research
scientists at MN Chemicals have collected the following kinetic and equilibrium data
for this reaction.
a. What is the activation energy and pre-exponential factor for the forward rate
constant? What is the heat of reaction?
-63kJmol
You are synthesizing cumene using a PFR with a volume of 150L. The reactants are fed
into the isothermal, isobaric reactor with a molar flow rate of 14.4molmin at a
propylene: benzene molar ratio of 2:1 and a total volumetric flow rate of 100Lmin.
Hint: Use the partial pressures of the gases instead of the molar concentrations in your
rate expressions.
b. What conversion do you achieve if the reactor is operated at 100C?[0.1]
c. What conversion do you achieve if the reactor is operated at 150C?[0.68]
d. Determine the equilibrium conversions at 100C and 150C as a function of
concentrations of various species? [at 100C,x=0.95; at 150C,x=0.68]
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