Zirconia-Supported Copper and Kno3 Catalysts for Diesel Soot Combustion Deactivation by Hydrotreatment and So2

ISSN: 2211-5455 (Online)
ISSN: 2211-5447 (Print)


Volume 3, 3 Issues, 2014


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Editor-in-Chief:
Shaobin Wang
Curtin University
Perth, WA 6845 U1987
Australia


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Zirconia-Supported Copper and Kno3 Catalysts for Diesel Soot Combustion Deactivation by Hydrotreatment and So2

Author(s): Sandra Mosconi, María L. Ruiz, María S. Leguizamón Aparicio, Marta I. Ponzi, Ileana D. Lick and Esther N. Ponzi

Affiliation: INTEQUI (CONICET-UNSL), 25 de Mayo Nº 384, Villa Mercedes (San Luis), 5730, Argentina.

Abstract

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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Article Details

Volume: 2
First Page: 1
Last Page: 1
Page Count: 1
DOI: 10.2174/2211544702666131224233822
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