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Essentials of Chemical Reaction Engineering by H. Scott Fogler

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9.3.4 Substrate Inhibition

In a number of cases, the substrate itself can act as an inhibitor. In the case of uncompetitive inhibition, the inactive molecule (S · E · S) is formed by the reaction

image

Consequently we see that by replacing (I) by (S) in Equation (9-40), the rate law for –rS is

9-44

image

We see that at low substrate concentrations

9-45

image

then

9-46

and the rate increases linearly with increasing substrate concentration.

At high substrate concentrations ...

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