CHAP. 9: CHEMICAL KINETICS [CONTENTS] 325
Solution
The specification for the batch reactor is the same as in the Example in9.7.2. The volume of
the batch reactor is 100 cm^3.
For the flow reactors we first calculate the feed. From the material balance we have
F=
1
τ
np
cA0−cA
=
1
32. 57
250
2. 6 − 0. 1
= 3. 07 dm^3 hr−^1.
The volume of the stirred flow reactor will be calculated from (9.170)
Vr=
1
νA
F
kcA
(cA−cA0) =
1
− 1
3. 07
0. 1 · 0. 1
(0. 1 − 2 .6) = 767. 5 dm^3.
The volume of the plug flow reactor will be calculated from (9.169)
Vr=
F
k
ln
cA0
cA
=
3. 07
0. 1
ln
2. 6
0. 1
= 100dm^3.
The volumes of the batch and plug flow reactors are the same, the volume of the stirred flow
reactor is more than seven-times higher.
