Strain of MFI crystals in membranes: An in situ synchrotron X-ray study

被引：38

作者：

Jeong, HK

Lai, ZP

Tsapatsis, M ^{[1
]}

Hanson, JC

机构：

[1] Univ Minnesota, Dept Chem Engn & Mat Sci, Minneapolis, MN 55455 USA

[2] Brookhaven Natl Lab, Dept Chem, Upton, NY 11953 USA

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2005年 / 84卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

crack formation; MFI zeolite membrane; negative thermal expansion; thin film stress; thermal behavior;

D O I：

10.1016/j.micromeso.2005.05.043

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Temperature-resolved in situ synchrotron X-ray diffraction is used for the first time to study the microstructure evolution of a preferentially oriented zeolite membrane (siliceous ZSM-5) during calcination of the organic structure directing agent (tetrapropyl ammonium, TPA). Use of transmission sample geometry allowed us to discriminate in-plane from out-of-plane reflections and to calculate strain imposed on the zeolite layer along the in-plane (parallel to the support) as well as the out-of-plane (perpendicular to the support) direction over the entire calcination process. The results strongly suggest that the zeolite crystals of the membrane are under compressive in-plane stress and that their thermal behavior is quite different from free standing powder. (c) 2005 Elsevier Inc. All rights reserved.

引用

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页码：332 / 337

页数：6

相关论文

共 15 条

[1] Synthesis and applications of molecular sieve layers and membranes [J].

Bein, T .

CHEMISTRY OF MATERIALS, 1996, 8 (08) :1636-1653

[2] An X-ray diffraction and MAS NMR study of the thermal expansion properties of calcined siliceous ferrierite [J].

Bull, I ;

Lightfoot, P ;

Villaescusa, LA ;

Bull, LM ;

Gover, RKB ;

Evans, JSO ;

Morris, RE .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2003, 125 (14) :4342-4349

[3] In situ X-ray diffraction and solid-state NMR study of the fluorination of γ-Al2O3 with HCF2Cl [J].

Chupas, PJ ;

Ciraolo, MF ;

Hanson, JC ;

Grey, CP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2001, 123 (08) :1694-1702

[4] Stability of oriented silicalite-1 films in view of zeolite membrane preparation [J].

denExter, MJ ;

vanBekkum, H ;

Rijn, CJM ;

Kapteijn, F ;

Moulijn, JA ;

Schellevis, H ;

Beenakker, CIN .

ZEOLITES, 1997, 19 (01) :13-20

[5] Template-removal-associated microstructural development of porous-ceramic-supported MFI zeolite membranes [J].

Dong, JH ;

Lin, YS ;

Hu, MZC ;

Peascoe, RA ;

Payzant, EA .

MICROPOROUS AND MESOPOROUS MATERIALS, 2000, 34 (03) :241-253

[6] Separation of C6 isomers by vapor permeation and pervaporation through ZSM-5 membranes [J].

Flanders, CL ;

Tuan, VA ;

Noble, RD ;

Falconer, JL .

JOURNAL OF MEMBRANE SCIENCE, 2000, 176 (01) :43-53

[7] CALCINATION OF LARGE MFI-TYPE SINGLE-CRYSTALS .2. CRACK FORMATION AND THERMOMECHANICAL PROPERTIES IN VIEW OF THE PREPARATION OF ZEOLITE MEMBRANES [J].

GEUS, ER ;

VANBEKKUM, H .

ZEOLITES, 1995, 15 (04) :333-341

[8]

HAMMERSELY AP, 1994, NUCL INSTRUM METHODS, V346, P321

[9] Microstructural optimization of a zeolite membrane for organic vapor separation [J].

Lai, ZP ;

Bonilla, G ;

Diaz, I ;

Nery, JG ;

Sujaoti, K ;

Amat, MA ;

Kokkoli, E ;

Terasaki, O ;

Thompson, RW ;

Tsapatsis, M ;

Vlachos, DG .

SCIENCE, 2003, 300 (5618) :456-460

[10] The widespread occurrence of negative thermal expansion in zeolites [J].

Lightfoot, P ;

Woodcock, DA ;

Maple, MJ ;

Villaescusa, LA ;

Wright, PA .

JOURNAL OF MATERIALS CHEMISTRY, 2001, 11 (01) :212-216