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Green Chemical Engineering
book

Green Chemical Engineering

by S. Suresh, S. Sundaramoorthy
December 2014
Intermediate to advanced content levelIntermediate to advanced
541 pages
17h 38m
English
CRC Press
Content preview from Green Chemical Engineering
354 Green Chemical Engineering
where L
0
is the equivalent length of the catalyst pellet that is equal to L for slab, R/2 for
cylinder and R/3 for sphere. Consider a catalyst pellet (Figure 4.25) of some regular shape
in contact with the gas stream containing reactant A at concentration C
Ag
.
The ux of A from the bulk gas to the surface of the pellet is
Nk
CC
AgAg AS
=−()
(4.217)
where
k
g
: gas lm mass transfer coefcient
Equating Equations 4.216 and 4.217, we get
NkCC kLC
AgAg AS po AS
=−=
()
ηρ
(4.218)
Solving Equation 4.218 for C
AS
, we get
C
k
kkL
C
AS
g
gpo
Ag
=
+
()
ηρ
(4.219)
Substituting Equation 4.219 for C
AS
into Equation 4.216, we get the global rate equation ...
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Publisher Resources

ISBN: 9781466558830