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← ScienceWhich outcome results when an oxidation catalyst in a catalytic converter degrades?
A)Increased nitrogen oxide formation rate
B)Reduced hydrocarbon conversion efficiency✓
C)Higher catalyst bed equilibrium temperature
D)Lower carbon monoxide activation energy
💡 Explanation
Degradation reduces the catalyst surface area, slowing down the catalytic oxidation process. The mechanism is decreased heterogeneous catalysis efficiency because fewer reactant molecules are adsorbed and converted. Therefore, hydrocarbon conversion decreases, rather than altering nitrogen or CO dynamics.
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