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: -rA = kcA2 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 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.
[800 L].
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 10mol 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
feed of pure A at a rate of 10mo(l)/(m)in and the volumetric flow rate is 2(L)/(m)in.
[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.
[800 L]
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: -rA = kca2 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
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.