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题名: Synthesis of the high-surface-area CexBa12xMnAl11Oy catalyst in reverse microemulsions using inexpensive inorganic salts as precursors
作者: Teng, F;  Xu, P;  Tian, ZJ;  Xiong, GX;  Xu, YP;  Xu, ZS;  Lin, LW
刊名: GREEN CHEMISTRY
发表日期: 2005
DOI: 10.1039/b417229a
卷: 7, 期:7, 页:493-499
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: The high-surface- area CexBa12xMnAl11Oy ( x = 0, 0.1, 0.2, 0.3) catalysts were synthesized in the nonionic reverse microemulsion ( ME), using the inorganic salts as the reactants. The supercritical drying ( SCD) and conventional oven drying ( CD) methods were used to remove the water in hydrogels, respectively. The CexBa12xMnAl11Oy samples were characterized by N-2-adsorption, transmission electron microscopy ( TEM), TGA-DTA, and X-ray powder diffraction ( XRD). The effects of the microemulsion composition, the drying method, the calcination temperature and the introduction of Ce on the catalysts were investigated. The results showed that the morphology of the catalyst was controlled by the microemulsion microstructure; and the homogeneity of the precursor was improved effectively by the reverse microemulsion method and the supercritical drying method. Due to the high homogeneity of the precursors, the initial formation temperature of the hexaaluminate phase decreased to lower than 1100 degrees C. The BaMnAl11O19 catalyst had high surface area ( 72.4 m(2) g(-1)) and high catalytic activity ( T-10 5 445 degrees C) for methane combustion. When Ce was introduced, the CexBa12xMnAl11Oy catalyst ( x = 1) had the higher activity ( T-10 = 430 degrees C) than that of the BaMnAl11O19 one due to a synergetic effect between Ce and Mn.
关键词[WOS]: HEXAALUMINATE CATALYSTS ;  COMBUSTION ;  ALUMINA ;  BAO.6AL2O3 ;  POROSITY ;  AEROGEL ;  METHANE ;  MN
语种: 英语
WOS记录号: WOS:000230009200002
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139913
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Lab Nat Gas Convers & Utilizat, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Teng, F,Xu, P,Tian, ZJ,et al. Synthesis of the high-surface-area CexBa12xMnAl11Oy catalyst in reverse microemulsions using inexpensive inorganic salts as precursors[J]. GREEN CHEMISTRY,2005,7(7):493-499.
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