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题名: Synthesis, characterization and catalytic applications of mesoporous gamma-alumina from boehmite sol
作者: Liu, Qian1;  Wang, Aiqin1;  Wang, Xuehai1, 2;  Gao, Peng1, 2;  Wang, Xiaodong1;  Zhang, Tao1
关键词: mesoporous gamma-alumina ;  boehmite sol ;  catalyst support ;  SO2 reduction by CO ;  methane combustion
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2008-04-15
DOI: 10.1016/j.micromeso.2007.08.007
卷: 111, 期:1-3, 页:323-333
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: In this study, boehmite sols were used as aluminum precursors for preparing mesoporous alumina (MA) having crystalline framework walls in the presence of non-ionic surfactants as structure directing agents. Nitrogen physisorption showed that aluminas prepared in this way displayed very rich porosities with large mesopores, and both the pore volumes and the pore sizes increased with the surfactant concentration. The improved textural parameters in the samples should be attributed to the three-dimensional interconnected scaffold-like channels, which were formed by randomly ordered stacking and condensing of rigid boehmite nanoparticles with the aid of the surfactant. TEM observations revealed that the precursor morphology had an important effect on the textural properties of the mesoporous alumina. The sample with a corrugated platelet-like morphology exhibited a large surface area of 463 m(2)/g, which was reduced to 81 m(2)/g after calcination at 1200 degrees C, indicating a strong resistance to sintering. This material, with its improved textural properties, crystalline framework walls and high thermal stability, not only could increase the dispersion of the active catalytic species, but also could enhance the diffusion efficiency and mass transfer of reactant molecules when employed as catalyst supports. As examples, our MA samples demonstrated a remarkable enhancement in the catalytic performances for both reactions of SO2 catalytic reduction by CO and catalytic combustion of methane. (C) 2007 Elsevier Inc. All rights reserved.
关键词[WOS]: MOLECULAR-SIEVES ;  METHANE ;  PALLADIUM ;  COMBUSTION ;  SURFACTANT ;  REDUCTION ;  OXIDATION ;  ACID ;  CO ;  ROUTE
语种: 英语
WOS记录号: WOS:000255847100044
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141180
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, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China

Recommended Citation:
Liu, Qian,Wang, Aiqin,Wang, Xuehai,et al. Synthesis, characterization and catalytic applications of mesoporous gamma-alumina from boehmite sol[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2008,111(1-3):323-333.
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