A study of a ceria-zirconia-supported manganese oxide catalyst for combustion of Diesel soot particles

被引：52

作者：

Sanchez Escribano, V. ^{[1
]}

Fernandez Lopez, E. ^{[1
]}

Gallardo-Amores, J. M. ^{[2
]}

del Hoyo Martinez, C. ^{[1
]}

Pistarino, C. ^{[3
]}

Panizza, M. ^{[3
]}

Resini, C. ^{[3
]}

Busca, G. ^{[3
]}

机构：

[1] Fac Ciencias Quim, Dept Quim Inorgan, E-37008 Salamanca, Spain

[2] Univ Complutense, Lab Complutense Altas Presiones, Dept Quim Inorgan 1, E-28040 Madrid, Spain

[3] Univ Genoa, Dipartimento Ingn Chim & Processo, I-16129 Genoa, Italy

来源：

COMBUSTION AND FLAME | 2008年 / 153卷 / 1-2期

关键词：

manganese oxide; cerium-zirconium mixed oxide; FT-IR spectroscopy; FT-Raman spectroscopy; catalytic oxidation; Diesel soot;

D O I：

10.1016/j.combustflame.2007.11.010

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A study has been conducted on the structural and morphological characterization of a Ce-Zr mixed oxide-supported Mn oxide as well as on its catalytic activity in the oxidation of particulate matter arising from Diesel engines. X-ray powder diffraction analysis (XRD) and FT-IR and FT-Raman spectroscopy evidence that the support is a fluorite-like ceria-zirconia solid solution, whereas the supported phase corresponds to the manganese oxide denoted as bixbyite (alpha-Mn2O3). Thermal analyses and FT-IR spectra in air at varying temperatures of soot mechanically mixed with the catalyst evidence that the combustion takes place to a total extent in the range 420-720 K, carboxylic species being detected as intermediate compounds. Moreover, the soot oxidation was studied in a flow reactor and was found to be selective to CO2, with CO as by-product in the range 420-620 K. The amount of the generated CO decreases significantly with increasing O-2 concentration in the feed. (C) 2008 The Combustion Institute. Published by Elsevier Inc. All rights reserved.

引用

页码：97 / 104

页数：8

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