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Supported Zeolite Beta Layers via an Organic Template-Free Preparation Route

Layers of high silica zeolites, synthesized with an organic structure directing agent (OSDA) and grown onto porous support structures, frequently suffer from the thermal stress during the removal of OSDA via the calcination process. The different thermal expansion coefficients of the zeolite and the...

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Autores principales: Reuss, Stephanie, Sanwald, Dirk, Schülein, Marion, Schwieger, Wilhelm, Al-Thabaiti, Shaeel A., Mokhtar, Mohamed, Basahel, Sulaiman N.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6017875/
https://www.ncbi.nlm.nih.gov/pubmed/29361724
http://dx.doi.org/10.3390/molecules23010220
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author Reuss, Stephanie
Sanwald, Dirk
Schülein, Marion
Schwieger, Wilhelm
Al-Thabaiti, Shaeel A.
Mokhtar, Mohamed
Basahel, Sulaiman N.
author_facet Reuss, Stephanie
Sanwald, Dirk
Schülein, Marion
Schwieger, Wilhelm
Al-Thabaiti, Shaeel A.
Mokhtar, Mohamed
Basahel, Sulaiman N.
author_sort Reuss, Stephanie
collection PubMed
description Layers of high silica zeolites, synthesized with an organic structure directing agent (OSDA) and grown onto porous support structures, frequently suffer from the thermal stress during the removal of OSDA via the calcination process. The different thermal expansion coefficients of the zeolite and the support material, especially when stainless steel is used as a support, causes enormous tension resulting in defect formation in the zeolite layer. However, the calcination is an easy procedure to decompose the OSDA in the pore system of the zeolite. Recently, methods to synthesize zeolite beta without the use of an organic structure directing agent have been described. In the present study, a seed-directed synthesis is used to prepare OSDA-free zeolite beta layers on stainless steel supports via an in situ preparation route. For the application as membrane, a porous stainless steel support has been chosen. The beta/stainless steel composites are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). To prove its possible application as a membrane, the beta/stainless steel composites were also tested by single gas permeances of H(2), He, CO(2), N(2), and CH(4).
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spelling pubmed-60178752018-11-13 Supported Zeolite Beta Layers via an Organic Template-Free Preparation Route Reuss, Stephanie Sanwald, Dirk Schülein, Marion Schwieger, Wilhelm Al-Thabaiti, Shaeel A. Mokhtar, Mohamed Basahel, Sulaiman N. Molecules Article Layers of high silica zeolites, synthesized with an organic structure directing agent (OSDA) and grown onto porous support structures, frequently suffer from the thermal stress during the removal of OSDA via the calcination process. The different thermal expansion coefficients of the zeolite and the support material, especially when stainless steel is used as a support, causes enormous tension resulting in defect formation in the zeolite layer. However, the calcination is an easy procedure to decompose the OSDA in the pore system of the zeolite. Recently, methods to synthesize zeolite beta without the use of an organic structure directing agent have been described. In the present study, a seed-directed synthesis is used to prepare OSDA-free zeolite beta layers on stainless steel supports via an in situ preparation route. For the application as membrane, a porous stainless steel support has been chosen. The beta/stainless steel composites are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). To prove its possible application as a membrane, the beta/stainless steel composites were also tested by single gas permeances of H(2), He, CO(2), N(2), and CH(4). MDPI 2018-01-21 /pmc/articles/PMC6017875/ /pubmed/29361724 http://dx.doi.org/10.3390/molecules23010220 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Reuss, Stephanie
Sanwald, Dirk
Schülein, Marion
Schwieger, Wilhelm
Al-Thabaiti, Shaeel A.
Mokhtar, Mohamed
Basahel, Sulaiman N.
Supported Zeolite Beta Layers via an Organic Template-Free Preparation Route
title Supported Zeolite Beta Layers via an Organic Template-Free Preparation Route
title_full Supported Zeolite Beta Layers via an Organic Template-Free Preparation Route
title_fullStr Supported Zeolite Beta Layers via an Organic Template-Free Preparation Route
title_full_unstemmed Supported Zeolite Beta Layers via an Organic Template-Free Preparation Route
title_short Supported Zeolite Beta Layers via an Organic Template-Free Preparation Route
title_sort supported zeolite beta layers via an organic template-free preparation route
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6017875/
https://www.ncbi.nlm.nih.gov/pubmed/29361724
http://dx.doi.org/10.3390/molecules23010220
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