Compositional and Fabrication Cycle Optimization of Ceria-Zirconia-Supported Mo-Based Catalysts for NH 3 -SCR NO x Reduction.

Autor:	Spiridigliozzi, Luca, Monfreda, Viviana, Esposito, Serena, Tammaro, Olimpia, Blangetti, Nicola, Deorsola, Fabio Alessandro, Dell'Agli, Gianfranco
Předmět:	NITROGEN oxides CATALYSTS NITROGEN in water CATALYTIC activity CATALYST synthesis CATALYTIC reduction MOLYBDENUM catalysts ATMOSPHERIC ammonia
Zdroj:	Inorganics; Aug2024, Vol. 12 Issue 8, p217, 17p
Abstrakt:	The reduction of nitrogen oxides (NOx), critical pollutants from stationary to mobile sources, mainly relies on the selective catalytic reduction (NH3-SCR) method, employing ammonia to reduce NOx into nitrogen and water. However, conventional catalysts, while effective, pose both environmental and operational challenges. This study investigates ceria-zirconia-supported molybdenum-based catalysts, exploring the effects of zirconium doping and different catalyst synthesis techniques, i.e., co-precipitation and impregnation. The catalytic performance of the differently prepared samples was significantly influenced by the molybdenum incorporation method and the zirconium content within the ceria-zirconia support. Co-precipitation at higher temperatures resulted in catalysts with better structural attributes but slightly lower catalytic activity compared to those prepared via impregnation. Optimal NOx reduction (close to 100%) was observed at a 15 mol% zirconium doping level when using the impregnation method. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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