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Selective reduction of NO with CO and naphthalene in the presence of oxygen on a core-shell CeO 2 @ TiO 2 supported copper-potassium-based catalyst

The selective reduction of NO with CO and naphthalene was investigated using a core-shell CeO2@TiO2 support impregnated with copper and potassium. The selective character of the reaction was due to the presence of oxygen, which induces the unwanted oxidation of CO and/or naphthalene. The latter constitutes a challenge in the reduction of NO because most of combustion processes occur in oxidizing atmospheres. The underway work shows that both Cu/SmCeO2@TiO2 and K/Cu/SmCeO2@TiO2 catalysts are able to achieve full conversion of NO at temperatures higher than 225 o C and 325 o C, respectively.