
230 Green Chemical Engineering
By a trial-and-error method, we calculate the Peclet number value as
For Reactor II,
σ
θ
2
483
5 913
0 1381
.
(. )
.
By a trial-and-error method, we calculate the Peclet number value as
For the rst-order reaction with reaction rate constant k, the conversion is
x
e
Af
Pe
Pe Pe
=−
+−−
(
−
1
4
2
22
α
(/)
(/
/)
() ()
where
α
τ
=+ =1
4k
Pe
and
For Reactor I,
k
τ= =(. )( .) .0 421 4 198 1 767
α= +
×
=1
41767
76
1 389
.
.
.
and
.
For Reactor II,
k
τ= =(. )( .) .0 421 5 913 2 489
α= +
×
=1
42489
13 4
1 320
.
.
.
and x
Af
.
It may be noted that both tanks in series model and axial dispersion model predict the
same conv ...