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← ScienceWhich effect occurs when adding platinum catalyst to a catalytic converter with high exhaust gas flow rate?
A)Increased pollutant conversion efficiency
B)Reduced catalyst bed temperature
C)Decreased residence time of reactants✓
D)Enhanced backpressure on the engine
💡 Explanation
With high exhaust flow rate, adding a platinum catalyst accelerates the reaction kinetics, increasing reaction speed but reducing residence time of reactants on catalyst surface due to a large volume passing. Therefore decreased residence time result, rather than increased efficiency, lowered temperature, or reduced backpressure which needs lower pressure constraints.
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