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Else_AIEC-INGLE_cH003.qxd 7/13/2006 1:46 PM Page 177
3.7 Three-Phase Fixed Beds: Trickle-Bed and Ped Bubble-Bed Reactors ack 177

 ( P ) Z  5.0784
ln  GL  2 (3.390)
 ( PZ ) ( P Z G )  3.531 (ln ) X
L

 ( PZ )  0.5
X  L  (3.391)
 ( PZ ) 
G

where P GL Z is the pressure drop in the trickle bed in Pa/m or N/m 3 (Pa N/m 2 ). This
equation holds for 0.05 X 30. Souandia and Latif i (2001) presented tw o similar equa-
tions based on X (Midoux et al ., 1976; T 1984): osun,

1 1.424
for 0.4 X (3.392)
1
60
X X 0.576

1 1.14
for 0.1 X (3.393)
80
1
X X 0.54
where
(  P ) Z  0.5
 GL  (3.394)
 ( PZ L ) 

Pressure drop in packed bubble bed reactors

The two-phase pressure drop term P GL Z can be calculated using the correlation of
Huntington (Ramachandran and Chaudhari, 1984):

P u 2 2
GL sG G (3.395)
Z d
pe

where
2
d pe d p (3.396)
3 1

ln( ) 8 1.12ln( ) 0.0769 ln( ) 0.0152 ln( ) 2 3 (3.397)