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学科主题: 物理化学
题名: Hierarchically structured meso-macroporous aluminosilicates with high tetrahedral aluminium content in acid catalysed esterification of fatty acids
作者: Lemaire, Arnaud1;  Wang, Quan-Yi1, 2, 4;  Wei, Yingxu2;  Liu, Zhongmin2;  Su, Bao-Lian1, 3
通讯作者: 刘中民 ;  SuBao-Lian
关键词: Aluminosilicate ;  Hierarchical multiporous ;  Porous self-generation phenomenon ;  Low Si/Al ratios ;  Ionic exchange ;  Esterification reaction ;  Catalytic test
刊名: JOURNAL OF COLLOID AND INTERFACE SCIENCE
发表日期: 2011-11-15
DOI: 10.1016/j.jcis.2011.08.017
卷: 363, 期:2, 页:511-520
收录类别: SCI
文章类型: Article
部门归属: DNL12
项目归属: DNL12
产权排名: 2,2
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
摘要: Hierarchically structured meso-macroporous aluminosilicates with high tetrahedral aluminium content in acid catalysed esterification of fatty acids
研究领域[WOS]: Chemistry
英文摘要: A simple synthesis pathway has been developed for the design of hierarchically structured spongy or spherical voids assembled meso-macroporous aluminosilicates with high tetrahedral aluminium content on the basis of the aqueous polymerisation of new stabilized alkoxy-bridged single molecular precursors. The intimate mixing of an aluminosilicate ester (sec-BuO)(2)-Al-O-Si(OEt)(3) and a silica co-reactant (tetramethoxysilane, TMOS) with variable ratios and the use of alkaline solutions (pH 13.0 and 13.5) improve significantly the heterocondensation rates between the highly reactive aluminium alkoxide part of the single precursor and added silica co-reactant, leading to aluminosilicate materials with high intra-framework aluminium content and low Si/Al ratios. The spherically-shaped meso-macroporosity was spontaneously generated by the release of high amount of liquid by-products (water/alcohol molecules) produced during the rapid hydrolysis and condensation processes of this double alkoxide and the TMOS co-reactant. It has been observed that both pH value and Al-Si/TMOS molar ratio can strongly affect the macroporous structure formation. Increasing pH value, even slightly from 13 to 13.5, can significantly favour the incorporation of Al atoms in tetrahedral position of the framework. After the total ionic exchange of Na(+) compensating cations, catalytic tests of obtained materials were realised in the esterification reaction of high free fatty acid (FFA) oils, showing their higher catalytic activity compared to commercial Bentonite clay, and their potential applications as catalyst supports in acid catalysed reactions. (C) 2011 Elsevier Inc. All rights reserved.
关键词[WOS]: SURFACTANT-ASSISTED SYNTHESIS ;  ONE-POT SYNTHESIS ;  MESOPOROUS ALUMINOSILICATES ;  PORE STRUCTURE ;  SELF-FORMATION ;  SI/AL RATIO ;  ZEOLITE ;  SILICA ;  MACROCHANNELS ;  COMPLEXES
语种: 英语
WOS记录号: WOS:000295192900012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115838
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.Univ Namur FUNDP, Lab Inorgan Mat Chem CMI, B-5000 Namur, Belgium
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
3.Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China
4.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China

Recommended Citation:
Lemaire, Arnaud,Wang, Quan-Yi,Wei, Yingxu,et al. Hierarchically structured meso-macroporous aluminosilicates with high tetrahedral aluminium content in acid catalysed esterification of fatty acids[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2011,363(2):511-520.
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