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Within a catalytic converter, which outcome results at high space velocity?

A)Reduced CO oxidation efficiency occurs
B)Increased NO reduction performance noted
C)Enhanced hydrocarbon conversion achieved here
D)Higher precious metal sintering evident

💡 Explanation

Reduced CO oxidation occurs because at high space velocity, residence time decreases, leading to a drop in the residence time. This limits the time available for surface reactions via the Langmuir-Hinshelwood mechanism; therefore CO oxidation suffers rather than other reactions that may be mass-transfer limited.

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