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← ScienceWhich outcome sharply limits catalytic activity inside a fuel reformer?
A)Catalyst surface poisoning by sulfur✓
B)Reversal of water-gas shift reaction
C)Excessive steam short-contact time
D)Diffusion limited molecular interactions
💡 Explanation
Catalyst activity plummets due to catalyst surface poisoning because strong chemical adsorption blocks active sites on the catalyst; therefore reaction rate drops significantly, rather than activity increasing, because other side-reactions become dominant when the primary surface is blocked.
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