Which phenomenon reduces NOx emissions in a catalytic converter operating outside stoichiometric conditions via the Zeldovich mechanism?

💡 Explanation

When NOx emissions are reduced outside of stoichiometry, selective catalytic reduction (SCR) involves injecting excess ammonia in presence of a catalyst, causing ammonia to react with NOx, forming nitrogen and water based on rate constants and kinetic limitations. Therefore (SCR) reduction results, rather than alternate approaches which don't address off-stoichiometry operation, rely on catalyst composition, or adsorption characteristics.

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