MnOx-CeO2-Al2O3 mixed oxides for soot oxidation: Activity and thermal stability
MnOx-CeO2-Al2O3 mixed oxides for soot oxidation: Activity and thermal stability
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用于烟灰氧化的 MnOx-CeO2-Al2O3 混合氧化物：活性和热稳定性
DOI：
10.1016/j.jhazmat.2011.01.010
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发表时间：
2011-03-15
影响因子：
13.6
通讯作者：
Ran, Rui
中科院分区：
文献类型：
--
作者：
Wu, Xiaodong;Liu, Shuang;Ran, Rui
采用溶胶-凝胶法将醋酸锰和硝酸铈浸渍在氧化铝粉体上制备了MnOx-CeO 2-Al 2 O3复合氧化物。MnOx-CeO 2和Al 2 O3改性的混合氧化物的热稳定性通过在800 ℃下在干燥空气流中处理20 h来评价。Al 2 O3的引入显著增加了催化剂的织构稳定性，同时MnOx和CeO 2的分散度相对较高，保持了这两种氧化物之间的强协同效应。高温煅烧后，三元氧化物的NO氧化活性损失较小，在NO.（C）2011 Elsevier B. V.存在下，可获得较低的碳烟氧化温度。
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.