4. Catalyst deactivation
This is an extremely important phenomenon in industrial practice, as the activity of a catalyst deteriorates as it is used. To account for this phenomenon, we define a quantity "a" which, from a formal point of view, defines the instantaneous activity of the catalyst by the ratio :
with :
- r :
-
speed at observation time
- r 0 :
-
speed at the initial instant.
To be more precise, "a" is a local quantity defined at a point on the catalyst...
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Catalyst deactivation
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