期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 187, 期 1-3, 页码 283-290出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2011.01.010
关键词
MnOx-CeO2 mixed oxides; Alumina modification; Diesel soot oxidation; NO oxidation; Thermal stability
资金
- National Natural Science Foundation of China [51072096]
- Ministry of Science and Technology of China [2010CB732304, 2009AA06Z313]
MnOx-CeO2-Al2O3 mixed oxides were prepared by impregnating manganese acetate and cerium nitrate on alumina powders using the sol-gel method. The thermal stabilities of MnOx-CeO2 and Al2O3-modified mixed oxides were evaluated by treating at 800 degrees C in dry air flow for 20h. The introduction of Al2O3 markedly increases the textural stability of the catalyst with a relatively high dispersion of MnOx and CeO2, remaining a strong synergistic effect between these two oxides. The NO oxidation activity of the ternary oxides experiences a smaller loss after high-temperature calcination, and a low soot oxidation temperature is attained in the presence of NO. (C) 2011 Elsevier B.V. All rights reserved.
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