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← ScienceWhich outcome reduces reaction completion rate during catalytic cracking?
A)Catalyst surface area fouling (deactivation)✓
B)Increased reactor operating temperature
C)Elevated concentration of desired products
D)Minimizing residence time on catalyst
💡 Explanation
Catalyst fouling reduces the cracking rate because surface adsorption is blocked, decreasing active sites for the reaction; therefore, the overall reaction slows rather than being enhanced by temperature or concentration increases.
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