Zirconia-Supported Copper and KNO<SUB>3</SUB> Catalysts for Diesel Soot Combustion : Deactivation by Hydrotreatment and SO<SUB>2</SUB>

In this study, the sulfur tolerance and hydrothermal stability of Cu-KNO3/ZrO2 catalysts in catalytic diesel soot oxidation were investigated. Supported alkaline nitrate catalysts have shown excellent activity for soot oxidation in the presence of O2 or NO/O2. High-temperature water vapor treatments...

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Detalles Bibliográficos
Autores principales: Mosconi, Sandra Mariela, Ruiz, Maria Lucía, Leguizamón Aparicio, María Silvia del Valle, Ponzi, Marta Isabel, Lick, Ileana Daniela, Ponzi, Esther Natalia
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2014
Materias:
Ingeniería Química
Diesel soot
Combustion
Hydrothermal stability
SO2
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/104726
http://hdl.handle.net/11336/5883
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
Descripción
Sumario:In this study, the sulfur tolerance and hydrothermal stability of Cu-KNO3/ZrO2 catalysts in catalytic diesel soot oxidation were investigated. Supported alkaline nitrate catalysts have shown excellent activity for soot oxidation in the presence of O2 or NO/O2. High-temperature water vapor treatments do not affect the catalytic activity, suggesting a good hydrothermal stability of the catalysts. Treatments performed at high SO2 concentration lead to a partial deactivation of the catalysts for the combustion reaction in the presence of O2. The presence of copper improves the sulfur tolerance of the KNO3/ZrO2 catalyst for the combustion of soot in the presence of NOx. NO/O2 present in the feed flow of the reactor can regenerate in situ nitrate anions that provide the redox cycles required for the reaction.

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