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Catalytic converter

Oxidation of carbon monoxide (CO) : 2CO + O₂ → 2CO₂ Oxidation of hydrocarbons (HC, for example, CₓHᵧ) : CₓHᵧ + (x + y/4)O₂ → xCO₂ + (y/2)H₂O Reduction of nitrogen oxides (NOx, for example, NO) : 2NO + 2CO → N₂ + 2CO₂ 2NO + 2H₂ → N₂ + 2H₂O

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Diesel exhaust system

Nitrogen oxide (NOx) reduction: NO + CO → 1/2N₂ + CO₂ 2NO + 2H₂ → N₂ + 2H₂O Oxidation of carbon monoxide (CO) : 2CO + O₂ → 2CO₂ Oxidation of hydrocarbons (HC) : CₓHᵧ + (x + y/4)O₂ → xCO₂ + (y/2)H₂O

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