A new method for measuring the adsorption induced stresses of zeolite films using magnetoelastic sensors

被引：10

作者：

Baimpos, Theodoros ^{[2
,3
]}

Nikolakis, Vladimiros ^{[1
,2
]}

Kouzoudis, Dimitris ^{[4
]}

机构：

[1] Univ Delaware, Catalysis Ctr Energy Innovat CCEI, Newark, DE 19816 USA

[2] Fdn Res & Technol Hellas, Inst Chem Engn & High Temp Chem Proc, GR-26504 Patras, Greece

[3] Univ Patras, Dept Chem Engn, Patras, Greece

[4] Univ Patras, Dept Engn Sci, GR-26504 Patras, Greece

来源：

JOURNAL OF MEMBRANE SCIENCE | 2012年 / 390卷

关键词：

Zeolite membranes; FAU; LTA; Magnetoelastic sensors; Adsorption induced deformation; MFI MEMBRANES; ELASTIC PROPERTIES; AMORPHOUS RIBBONS; SORBED MOLECULES; CARBON-DIOXIDE; HIGH-PRESSURES; NAA ZEOLITE; TEMPERATURE; SEPARATION; COMPOSITE;

D O I：

10.1016/j.memsci.2011.11.031

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A new method is presented for measuring the stresses imposed on a substrate from a zeolite membrane either due to the synthesis of the zeolite film or due to adsorption induced strains. The resonance and anti-resonance frequencies of a zeolite/Metglas ribbon were measured and were related to the stress imposed on Metglas using the phenomenological theory of magnetoelasticity. The adsorption of water in FAU and LTA films were selected as representative systems to be studied. For both zeolite membranes, the stress had a non monotonic dependence (passed through a minimum) on water loading. The measured stresses are in qualitative agreement with the literature data about changes of the zeolite unit cell size as a function of humidity. The developed methodology is general and it can be used for measuring strains due to adsorption in any microporous film as long as it can be deposited as uniform layer on a magnetoelastic ribbon. (C) 2011 Elsevier B. V. All rights reserved.

引用

页码：130 / 140

页数：11

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