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← ScienceWhich outcome limits ethylene oxide production rate during silver catalysis?
A)Deactivation through surface carbon deposition✓
B)Excess aldehyde formation with lower selectivity
C)Increased exothermic runaway chain branching
D)Product inhibition at higher oxide pressures
💡 Explanation
Surface carbon deposition hinders ethylene epoxidation using silver catalysts, hindering the rate. The slow removal through oxidation creates carbonaceous deposits that block active sites, therefore catalyst deactivation is the outcome, rather than over-oxidation because aldehyde formation is not directly part of catalyst poisoning.
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