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
收藏
页码：97 / 104
页数：8
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