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题名: Preparation of Mn substituted La-hexaaluminate catalysts by using supercritical drying
作者: Wang, JW;  Tian, ZJ;  Xu, JG;  Xu, YP;  Xu, ZS;  Lin, LW
关键词: methane combustion ;  hexaaluminate ;  supercritical drying ;  aerogel ;  xerogel
刊名: CATALYSIS TODAY
发表日期: 2003-08-15
DOI: 10.1016/S0920-5861(03)00238-4
卷: 83, 期:1-4, 页:213-222
收录类别: ISTP ;  SCI
文章类型: Article
部门归属: 802
项目归属: 802
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: LaMnxAl12-xO19 catalysts were prepared from NH4OH and metal nitrates solutions. Supercritical drying (SCD) and conventional oven drying (CD) methods were used to extract the water in the hydrogel. The effects of drying methods on properties of the catalysts were investigated by means of TEM, N-2-adsorption, thermogravimetry (TG)-differential thermal analysis (DTA) and X-ray diffraction. SCD method is beneficial to maintain high surface area and improving catalytic activity for methane combustion of the catalyst. The specific surface area and pore volume of LaMn1Al11O19 catalyst prepared by SCD method are 28 m(2)/g and 0.23 cm(3)/g, respectively, and the ignition of methane could be carried out at 450degreesC. However, those of the CD catalyst prepared from the same precursor are 15 m(2)/g, 0.11 cm(3)/g and 530 degreesC, respectively. Suitable Mn content (0 less than or equal to x less than or equal to 2) could promote the formation of LaMnAl11O19 hexaaluminate, while further addition of Mn (2 less than or equal to x less than or equal to 6) cause the formation of LaMnO3. (C) 2003 Elsevier B.V All rights reserved.
关键词[WOS]: SURFACE-AREA ;  METHANE COMBUSTION ;  OXIDE SUPPORTS ;  ALUMINA ;  STABILIZATION ;  OXIDATION ;  ADDITIVES ;  BEHAVIOR
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000185021100017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/81563
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, Dalian 116023, Peoples R China

Recommended Citation:
Wang, JW,Tian, ZJ,Xu, JG,et al. Preparation of Mn substituted La-hexaaluminate catalysts by using supercritical drying[J]. CATALYSIS TODAY,2003,83(1-4):213-222.
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