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← ScienceWhich undesired outcome results when a fixed-bed reactor hot-spot develops?
A)Catalyst deactivation accelerates significantly✓
B)Equilibrium conversion is thermodynamically limited
C)Mass transport limitations get reduced
D)External surface area declines slightly
💡 Explanation
A hot-spot accelerates catalyst deactivation from fouling because localized high temperatures increase the rate constants of deactivation reactions relative to desired reactions; therefore the catalyst deactivates rapidly rather than maintaining activity with uniform temperature.
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