Which undesired outcome results when a fixed-bed reactor hot-spot develops?

💡 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.

• Which outcome occurs when platinum is heated catalyzing ammonia oxidation?
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• Which outcome occurs when a voltage increases across quantum dot junctions?
• Which outcome reduces product yield when an exothermic reaction reaches equilibrium in a closed reactor?