Preparation and characterization of super-microporous alumina with crystalline structure

被引：11
作者：
Li, Yongfeng [1 ]
Su, Jiaojiao [2 ]
Li, Ruifeng [2 ]
机构：
[1] Shanxi Inst Energy, Jinzhong 030600, Peoples R China
[2] Taiyuan Univ Technol, Coll Chem & Chem Engn, Taiyuan 030024, Peoples R China
来源：
MICROPOROUS AND MESOPOROUS MATERIALS | 2017年 / 243卷
基金：
山西省青年科学基金; 中国国家自然科学基金;
关键词：
Super-microporous; Alumina; Crystalline; High surface area; Selective catalytic reduction; FACILE SYNTHESIS; SUPERMICROPOROUS SILICA; GAMMA-ALUMINA; THIN-FILMS; CATALYSTS; REDUCTION; FRAMEWORK; ROUTE; MAS; NMR;
D O I：
10.1016/j.micromeso.2017.02.012
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Super-microporous alumina (pore size between 1 and 2 nm) with polycrystalline walls and high surface area (more than 650 m(2)/g) was synthesized successfully via an evaporation induced self-assembly (EISA) pathway using readily available and inexpensive nonionic surfactant fatty alcohol polyoxyethylene ether (AEO-7) as the template. N-2 adsorption-desorption results showed that the obtained materials are super-microporous when removing the template at 400 degrees C, then if the calcination temperature increase from 600 degrees C to 1000 degrees C, a breakdown of the walls separating adjacent pores allows the transformation to mesopores (pore size > 2 nm). FTIR pyridine adsorption and NH3-TPD measurement suggested the presence of strong Lewis acid sites. Transmission electron microscopy (TEM) measurements indicated that the alumina possesses the disordered "wormhole-like" super-microporous structure with polycrystalline walls. Loaded with copper, the catalyst exhibited outstanding activity in the selective catalytic reduction of NO with methane and could achieve a NOx conversion 100% when the reaction temperature is over 600 degrees C. (C) 2017 Elsevier Inc. All rights reserved.
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页码：9 / 15
页数：7
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