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题名: Effect of amounts of urea on Mn-substituted hexaaluminate catalysts prepared by hydrothermal synthesis
作者: Xu, JG;  Tian, ZJ;  Wang, JW;  Zu, YP;  Xu, ZS;  Lin, LW
关键词: methane ;  catalytical combustion ;  hexaaluminate ;  hydrothermal synthesis ;  urea
刊名: CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
发表日期: 2004
卷: 25, 期:1, 页:90-94
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: Mn-substituted hexaaluminate catalysts were prepared by hydrothermal synthesis based on hydrolysis of urea. The effects of amounts of urea[n(Urea)/n(M+), M+ is metal cation with a single charge] added on chemical composition, phase, pore structure and methane combustion activity of the LaMnAl11O19-alpha catalysts were investigated. When n (Urea)/n(M+)=1.0, Mn2+ ions did not precipitated completely and the activity of the catalyst for methane combustion was low. With n(Urea)/n(M+) ratio increasing to 2.0, the activity of catalyst was increased due to more amounts of hexaaluminate phase and larger pore diameter in the catalyst. With increasing of n(Urea)/n(M+) ratio further more, the activity of catalyst was decreased because amounts of hexaaluminate phase in the catalyst were decreased and the pore diameter of the catalyst became smaller. The life test during 100 h the catalyst prepared with n(Urea)/n(M+)=2.0 was carried out and the results showed that the activity of the catalyst for methane combustion and the specific surface area of the catalyst were maintained during, 100 h life test.
关键词[WOS]: METHANE COMBUSTION ;  SURFACE-AREA
语种: 英语
WOS记录号: WOS:000188470400022
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139369
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, Res Lab Nat Gas Chem Engn & Applicat, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalyt Basis, Dalian 116023, Peoples R China

Recommended Citation:
Xu, JG,Tian, ZJ,Wang, JW,et al. Effect of amounts of urea on Mn-substituted hexaaluminate catalysts prepared by hydrothermal synthesis[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2004,25(1):90-94.
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