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Else_AIEC-INGLE_cH004.qxd 7/1/2006 6:53 PM Page 321
4.2 Design of Adsorption and Ion-Exchange Processes 321
Solution
The dimensionless numbers needed for further calculations are
du ps
Re p 0.154
Sc 1002
D f
f
The mass transfer coeficient in the liquid film can be calculated using the correlation of
Williamson (eq. (3.346)):
Sh 2.4 0.66 Re Sc 0.34 p 0.33 8.11
where
)
0.524
(1
p
b
and thus
kd fp
Sh k 0.00126 cm/s
f
D
f
The solid-side mass transfer coeficient is (eq. (4.174)) f
15 D 6 3
sb
ka su 2 1.18 10 g/sc
m
r
o
The equilibrium relationship is used for the determination of the maximum loading of the
solid phase (eq. (4.14)):
q o C 178 o 0.113 229.24 mg/g
Then, using eq. (4.175),
q
max 3016.58 /g 3
c
m
C o
