Poisoned catalyst, Arrhenius plot

Arrhenius plots for poisoned and unpoisoned catalysts. [From AIChE J., 7 (211), 1961. Used with permission.]... 

Figure 9. Arrhenius plot for a lead-poisoned catalyst after 250-hr accumulation using fuel with 0.1 g Pb/gal...

The Temkin-Pyzhev equation was also used to analyze the performance of a catalyst charge with a feed gas containing larger amount of poisons than the experiments above. The activity was only one third of the activity of a catalyst operating with a relatively pure gas. A bend in the Arrhenius plot could be observed around 450 °C. The Temkin-Pyzhev equation with the as-found constants was eventually used to find the optimum temperature curve in an ideal as well as a practical reactor. 

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