Which mechanism reduces nitric oxide (NO) emissions in catalytic converters of combustion engines?

💡 Explanation

When combustion occurs, high temperatures generate NO, which is then reduced via selective catalytic reduction (SCR). The catalyst facilitates the reaction of NO with NH3 to form N2 and H2O. Therefore, through SCR, NO emissions are reduced rather than through air-fuel adjustments, cooling, or lean NOx traps which involve alternative chemical reactions.

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