The transient reduction of NO with CO and naphthalene in the presence of oxygen using a core-shell SmCeO2@TiO2-supported copper catalyst

Fernanda Venegas, Naima López, Luis Sánchez-Calderón, Gonzalo Aguila, Paulo Araya, Xuyun Guo, Ye Zhu, Sichem Guerrero

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Abstract

This work studied the reaction of common pollutants on a catalytic surface under oxidizing conditions. CO and naphthalene were used to reduce NO in the presence of oxygen during the transient heating of metal oxide nanoparticles. The latter consisted of a core-shell SmCeO2@TiO2 support with a TiO2 core and a samarium-stabilized CeO2 shell, impregnated with copper and potassium. The addition of potassium simulated the gradual accumulation of an alkali metal during biomass combustion, which can poison the catalyst. The Cu/SmCeO2@TiO2 catalyst achieved the complete conversions of NO, CO and naphthalene at 225, 236 and 255 °C, respectively. Even though the inclusion of potassium had the expected negative effect, the K/Cu/SmCeO2@TiO2 catalyst was still able to fully convert NO and CO at 323 and 299 °C, respectively, whereas a maximum naphthalene conversion of only 66% was obtained at 350 °C.
Original languageAmerican English
Pages (from-to)3408-3415
Number of pages8
JournalCatalysis Science and Technology
Volume9
Issue number13
DOIs
StatePublished - 1 Jan 2019

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