Complete catalytic oxidation of o-xylene over Mn-Ce oxides prepared using a redox-precipitation method

被引：71
作者：
Wu, Yinsu [1 ]
Zhang, Yuxia [1 ]
Liu, Min [1 ]
Ma, Zichuan [1 ]
机构：
[1] Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050016, Peoples R China
来源：
CATALYSIS TODAY | 2010年 / 153卷 / 3-4期
基金：
中国国家自然科学基金;
关键词：
Mn-Ce oxides; Redox-precipitation method; o-Xylene; Complete catalytic oxidation; VOLATILE ORGANIC-COMPOUNDS; LOW-TEMPERATURE SCR; WET OXIDATION; TITANIA CATALYSTS; MNCEOX CATALYSTS; MANGANESE OXIDES; CERIUM OXIDE; PALLADIUM; NH3; COMBUSTION;
D O I：
10.1016/j.cattod.2010.01.064
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
A series of Mn-Ce oxides were prepared using a redox-precipitation method and the complete catalytic oxidation of o-xylene was examined Catalytic activity was evaluated in terms of both o-xylene conversion and CO2 yield The effects of the Mn-at/Ce-at atomic ratio and calcination temperature on the features of catalyst structure and catalytic behavior were examined When the Mn-at/Ce-at ratio was 1 5 and the catalyst was calcined at 400 degrees C, the conversion of o-xylene was 100% and the CO2 yield was 100% at 240 degrees C X-ray diffraction (XRD). X-ray fluorescence (XRF), X-ray photoelectron spectroscopy (XPS), and hydrogen temperature-programmed reduction (H-2-TPR) studies revealed that the catalysts prepared via the redox-precipitation method possessed a homogenous dispersion of amorphous MnO2 and CeO2 nanoparticles, in the main active phase, MnO2 provided available oxygen species and CeO2 enhanced oxygen mobility The synergistic effects between MnO2 and CeO2 potentiated the catalytic activity necessary for the complete catalytic oxidation of o-xylene (C) 2010 Elsevier B V All rights reserved
引用
收藏
页码：170 / 175
页数：6
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