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242 Modeling of Chemical Kinetics and Reactor Design
range of 0.5–4, as in the case of hydrodesulfurization shown in Fig-
ure 4-16.
Unlike the slurry reactor, a trickle-bed reactor approaches plug flow
behavior and, therefore, the problem of separating the catalyst from
the product stream does not exist. The low ratio of liquid to catalyst
in the reactor minimizes the extent of homogeneous reaction. However,
Figure 4-16. Trickle-bed (tubular reactor) for hydrodesulfurization. (Source:
J. M. Smith, Chemical Engineering Kinetics, 3rd ed., McGraw-Hill, Inc., 1981.)
