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Synthesis, characterization and catalytic applications of mesoporous gamma-alumina from boehmite sol
Liu, Qian1; Wang, Aiqin1; Wang, Xuehai1,2; Gao, Peng1,2; Wang, Xiaodong1; Zhang, Tao1
KeywordMesoporous Gamma-alumina Boehmite Sol Catalyst Support So2 Reduction By Co Methane Combustion
Source PublicationMICROPOROUS AND MESOPOROUS MATERIALS
2008-04-15
DOI10.1016/j.micromeso.2007.08.007
Volume111Issue:1-3Pages:323-333
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS KeywordMOLECULAR-SIEVES ; METHANE ; PALLADIUM ; COMBUSTION ; SURFACTANT ; REDUCTION ; OXIDATION ; ACID ; CO ; ROUTE
AbstractIn 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.
Language英语
WOS IDWOS:000255847100044
Citation statistics
Cited Times:93[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/141180
Collection中国科学院大连化学物理研究所
Affiliation1.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
GB/T 7714
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.
APA Liu, Qian,Wang, Aiqin,Wang, Xuehai,Gao, Peng,Wang, Xiaodong,&Zhang, Tao.(2008).Synthesis, characterization and catalytic applications of mesoporous gamma-alumina from boehmite sol.MICROPOROUS AND MESOPOROUS MATERIALS,111(1-3),323-333.
MLA Liu, Qian,et al."Synthesis, characterization and catalytic applications of mesoporous gamma-alumina from boehmite sol".MICROPOROUS AND MESOPOROUS MATERIALS 111.1-3(2008):323-333.
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