Formation of mesopores in zeolite beta by steaming: a secondary pore channel system in the (001) plane

被引：56

作者：

Bernasconi, S

van Bokhoven, JA

Krumeich, F

Pirngruber, GD

Prins, R ^{[1
]}

机构：

[1] ETH, Inst Chem & Bioengn, Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland

[2] ETH, Swiss Fed Inst Technol, Inorgan Chem Lab, CH-8093 Zurich, Switzerland

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2003年 / 66卷 / 01期

关键词：

secondary pore channel; mesoporous zeolite; TEM; N(2) adsorption; DFT model; CATALYST; ACIDITY; ACYLATION; NITRATION; TOPOLOGY; BENZENE;

D O I：

10.1016/j.micromeso.2003.08.022

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The texture of a series of dealuminated macrocrystalline beta zeolites has been investigated by N(2) physisorption, transmission electron microscopy, and electron diffraction. Hydrothermal dealumination creates a secondary mesoporous system in zeolite BEA. N(2) physisorption together with DFT calculations indicated the presence of pores with an estimated size of 2-4 nm after steaming. After subsequent leaching, TEM revealed the newly formed cylindrical mesopores. As determined by electron diffraction, the new porous network consists of pores lying in the (0 0 1) plane. (C) 2003 Elsevier Inc. All rights reserved.

引用

页码：21 / 26

页数：6

共 34 条

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