Problem 4: Residence time
You are asked to select and size reactors to isothermally carry out a liquid phase,
irreversible, reaction A ? B with the following kinetics: $-r_A = kc_A^2$ where k = 0.2 L/
(mol*min).
a.
Starting with a mole balance (and assumptions), calculate the time that it would
take a batch reactor to process your feed to achieve 95% conversion. The batch
reactor is initially charged with 10 mol of pure A and the reactor size is 2L. [20
min]
b.
Starting with a mole balance (and assumptions), calculate the residence time it
would take a PFR to process your feed to 95% conversion. The PFR has an inlet
Chemical Reaction Engineering—Spring 2024—Homework #1
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feed of pure A at a rate of 10 mol/min and the volumetric flow rate is 2L/min.
[20 min]
c.
Compare your results in parts A and B and explain their relationship.
d.
Starting with a mole balance (and assumptions), calculate the volume it would
take for a CSTR to process your feed (from part B) to achieve 95% conversion.