Which effect occurs in industrial ammonia synthesis when the feed gas contains trace amounts of carbon monoxide?

💡 Explanation

When trace CO is present, adsorption blockage occurs because CO binds strongly to the catalyst surface, blocking active sites and inhibiting nitrogen and hydrogen adsorption, thereby decreasing the reaction rate. Therefore catalyst poisoning resulting in a reduced rate is the observed consequence, rather than increased equilibrium, enhanced heat transfer, or reduced activation energy, which would require entirely different conditions.

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