Which outcome occurs when platinum catalyst surface area decreases during ammonia oxidation for nitric acid production?

💡 Explanation

When the catalyst surface area decreases, the rate of adsorption and reaction decreases because fewer active sites are available for ammonia and oxygen on the catalyst surface, reducing the exothermic reaction rate. Therefore, the reaction rate decreases, rather than N2O minimized, ammonia conversion increased, or reactor temperature being stable, which depend on different operating regimes.

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