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Reactor Design 399
. Porous
solid
Flowing
bulk gas
Figure 7.5 Mechanisms of mass transfer for catalytic pellets.
(Source Ref. 18 with permission).
Round off the bed height to 22 ft (6.71 m), which, according to Equation
7.11.6, is below 25 ft (7.62 m), the maximum bed height allowed to avoid crush-
ing the pellets.
From Equation 7.11.7, the reactor length
L R = (22 + 3) = 25 ft (7.62 m)
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