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284 Multiple Reactions Chap. 6
D
A
u
Figure 6-1 Reaction-separation system producing both desired and undesired
products.
tu.
.ow i-iigh
Figure 6-2 Efficiency of a reactor system.
of the separation system could be quite high. Normally, as the cost of a reactor
system increases in an attempt to mininize U, the cost of separating species U
from D decreases (Figure 6-2).
6.1 Maximizing the Desired Product
in Parallel Reactions
In this section we discuss various means of miI.limizing the undesired product,
U, through the selection of reactor type and conditions. We also discuss the
development of efficient reactor schemes.
For the competing reactions
A kD > D (ciesiredj
A > U (undesired)
the rate laws are
Rate laws for
formation of
desired and
undesired products
