Which consequence results when a packed-bed reactor's temperature fluctuates rapidly around the optimal value for a kinetically-controlled exothermic reaction?

A)Substantial increase in catalyst lifetime

B)Oscillations in product concentration✓

C)Equilibrium constant becomes more favorable

D)Reaction becomes mass-transfer limited

💡 Explanation

Oscillations in product concentration emerge due to thermal runaway. Thermal runaway causes a rapid rate increase at temperature peaks, quickly consumed reactants; a subsequent rate decrease follows during troughs because Arrhenius equation dictates temperature sensitivity. Because of this, thermal runaway drives product concentration swings, rather than equilibrium constant shifts or catalyst life prolongation.

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Which consequence results when a packed-bed reactor's temperature fluctuates rapidly around the optimal value for a kinetically-controlled exothermic reaction?

💡 Explanation

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