
240 Green Chemical Engineering
volume. The concentration of A in the bypass stream is the same as the feed concentration
C
Ao
. The active volume is treated as an ideal CSTR.
Taking a steady-state balance of reactant A around the active volume, we get
aA aAaaAa0
(3.387)
Dividing by q
a
,
CC
V
q
kC
AAa
a
a
Aa0
=+
(3.388)
and
q
q
a
a
= =
γ
γ
τ
(3.389)
A0
C
A0
C
Af
q
a
C
Aa
C
Aa
q
b
q
a
V
a
V
d
FIGURE 3.70
Reaction in a non-ideal CSTR with dead zone and bypass.
Slope = –
=
ln
ln[E(θ)]
γ
γ
2
βθ
βθ
FIGURE 3.69
Plot of ln(E(θ)) versus θ for a non-ideal CSTR with dead zone and bypass.