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Preparation of MnOx-CeO2-Al2O3 mixed oxides for NOx-assisted soot oxidation: Activity, structure and thermal stability
Lin, Fan; Wu, Xiaodong; Liu, Shuang; Weng, Duan; Huang, Yuying
2013
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
Volume226Pages:CONCATENATE(Sheet1!I260,-Sheet1!J260)
AbstractThree kinds of MnOx-CeO2-Al2O3 mixed oxides were prepared by introducing Al2O3 to MnOx-CeO2 at different stages of a sol-gel method. MnCeAl and MnCe/Al were received by adding aluminum nitrate and alumina powders to the Mn-Ce precursor solution, respectively, while MnCe + Al was obtained by mixing the sol-gel-synthesized MnOx-CeO2 and Al2O3 powders mechanically. The catalysts were calcined in air at 800 degrees C for 20 h to obtain the thermally aged samples. The catalysts were characterized by soot and NO temperature-programmed oxidation (soot-TPO and NO-TPO), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), extended X-ray absorption fine structure (EXAFS), energy dispersive spectroscopy (EDS) and H-2 temperature-programmed reduction (TPR). The introduction of Al2O3 degrades the soot oxidation activity of the fresh catalysts compared with MnOx-CeO2 mixed oxides, but it helps to maintain relatively high catalyst surface area and high MnOx dispersion after the rigorous aging treatment. Among the catalysts prepared, MnCe/Al exhibits the highest thermal stability with a small increase of T-m by 17 degrees C for soot oxidation after aging. The active surface area, which refers to the exposure area of MnOx on the catalyst, is suggested to determine the NO oxidation and soot oxidation activities of the aged catalysts. (C) 2013 Elsevier B.V. All rights reserved.
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000321411800015
Citation statistics
Cited Times:39[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13863
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Lin, Fan,Wu, Xiaodong,Liu, Shuang,et al. Preparation of MnOx-CeO2-Al2O3 mixed oxides for NOx-assisted soot oxidation: Activity, structure and thermal stability[J]. CHEMICAL ENGINEERING JOURNAL,2013,226:CONCATENATE(Sheet1!I260,-Sheet1!J260).
APA Lin, Fan,Wu, Xiaodong,Liu, Shuang,Weng, Duan,&Huang, Yuying.(2013).Preparation of MnOx-CeO2-Al2O3 mixed oxides for NOx-assisted soot oxidation: Activity, structure and thermal stability.CHEMICAL ENGINEERING JOURNAL,226,CONCATENATE(Sheet1!I260,-Sheet1!J260).
MLA Lin, Fan,et al."Preparation of MnOx-CeO2-Al2O3 mixed oxides for NOx-assisted soot oxidation: Activity, structure and thermal stability".CHEMICAL ENGINEERING JOURNAL 226(2013):CONCATENATE(Sheet1!I260,-Sheet1!J260).
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