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Which consequence results when a nickel catalyst degrades during methane steam reforming?

A)Reduced equilibrium hydrogen production
B)Increased carbon dioxide selectivity
C)Enhanced catalyst surface area
D)Lower operating temperature requirement

💡 Explanation

Reduced hydrogen production results when nickel catalyst degrades because surface area is reduced, inhibiting the adsorption of reactants in the reforming mechanism. Therefore, lower hydrogen output arises rather than enhanced CO2 or activity at lowered temperatures because nickel sites become hindered.

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