Preparation of Continuous Highly Hydrophobic Pure Silica ITQ-29 Zeolite Layers on Alumina Supports
The preparation of continuous layers of highly hydrophobic pure silica ITQ-29 zeolite, potentially applicable as hydrophobic membranes for separation of molecules based on their polarity, has been investigated. Continuous layers of intergrown ITQ-29 zeolite crystals were successfully grown on porous...
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doaj-36d6d09e2ee04ad7a195aa83166e06c42020-11-25T03:28:48ZengMDPI AGMolecules1420-30492020-09-01254150415010.3390/molecules25184150Preparation of Continuous Highly Hydrophobic Pure Silica ITQ-29 Zeolite Layers on Alumina SupportsMiguel Palomino0Hideki Ono1Susana Valencia2Avelino Corma3Instituto de Tecnología Química (UPV-CSIC), Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas, Av. de los Naranjos s/n, 46022 Valencia, SpainCentral Technical Research Laboratory, ENEOS Corporation, 8, Chidoricho, Naka-ku, Yokohama 231-0815, JapanInstituto de Tecnología Química (UPV-CSIC), Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas, Av. de los Naranjos s/n, 46022 Valencia, SpainInstituto de Tecnología Química (UPV-CSIC), Universitat Politècnica de València, Consejo Superior de Investigaciones Científicas, Av. de los Naranjos s/n, 46022 Valencia, SpainThe preparation of continuous layers of highly hydrophobic pure silica ITQ-29 zeolite, potentially applicable as hydrophobic membranes for separation of molecules based on their polarity, has been investigated. Continuous layers of intergrown ITQ-29 zeolite crystals were successfully grown on porous alumina supports by optimization of the synthesis conditions, such as the appropriate selection of the seeds, the procedure for the gel preparation, and the calcination conditions. This resulted in the formation of all silica ITQ-29 zeolite layers without the presence of germanium required in previously reported ITQ-29 membranes, with the subsequent improvement in quality and stability, as verified by the absence of cracks after calcination. We have proved that the incorporation of aluminum from the support into the zeolite layer does not occur, neither during the secondary growth nor through migration of aluminum species during calcination.https://www.mdpi.com/1420-3049/25/18/4150ITQ-29 zeoliteLTA structurepure silicazeolite membrane |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Miguel Palomino Hideki Ono Susana Valencia Avelino Corma |
spellingShingle |
Miguel Palomino Hideki Ono Susana Valencia Avelino Corma Preparation of Continuous Highly Hydrophobic Pure Silica ITQ-29 Zeolite Layers on Alumina Supports Molecules ITQ-29 zeolite LTA structure pure silica zeolite membrane |
author_facet |
Miguel Palomino Hideki Ono Susana Valencia Avelino Corma |
author_sort |
Miguel Palomino |
title |
Preparation of Continuous Highly Hydrophobic Pure Silica ITQ-29 Zeolite Layers on Alumina Supports |
title_short |
Preparation of Continuous Highly Hydrophobic Pure Silica ITQ-29 Zeolite Layers on Alumina Supports |
title_full |
Preparation of Continuous Highly Hydrophobic Pure Silica ITQ-29 Zeolite Layers on Alumina Supports |
title_fullStr |
Preparation of Continuous Highly Hydrophobic Pure Silica ITQ-29 Zeolite Layers on Alumina Supports |
title_full_unstemmed |
Preparation of Continuous Highly Hydrophobic Pure Silica ITQ-29 Zeolite Layers on Alumina Supports |
title_sort |
preparation of continuous highly hydrophobic pure silica itq-29 zeolite layers on alumina supports |
publisher |
MDPI AG |
series |
Molecules |
issn |
1420-3049 |
publishDate |
2020-09-01 |
description |
The preparation of continuous layers of highly hydrophobic pure silica ITQ-29 zeolite, potentially applicable as hydrophobic membranes for separation of molecules based on their polarity, has been investigated. Continuous layers of intergrown ITQ-29 zeolite crystals were successfully grown on porous alumina supports by optimization of the synthesis conditions, such as the appropriate selection of the seeds, the procedure for the gel preparation, and the calcination conditions. This resulted in the formation of all silica ITQ-29 zeolite layers without the presence of germanium required in previously reported ITQ-29 membranes, with the subsequent improvement in quality and stability, as verified by the absence of cracks after calcination. We have proved that the incorporation of aluminum from the support into the zeolite layer does not occur, neither during the secondary growth nor through migration of aluminum species during calcination. |
topic |
ITQ-29 zeolite LTA structure pure silica zeolite membrane |
url |
https://www.mdpi.com/1420-3049/25/18/4150 |
work_keys_str_mv |
AT miguelpalomino preparationofcontinuoushighlyhydrophobicpuresilicaitq29zeolitelayersonaluminasupports AT hidekiono preparationofcontinuoushighlyhydrophobicpuresilicaitq29zeolitelayersonaluminasupports AT susanavalencia preparationofcontinuoushighlyhydrophobicpuresilicaitq29zeolitelayersonaluminasupports AT avelinocorma preparationofcontinuoushighlyhydrophobicpuresilicaitq29zeolitelayersonaluminasupports |
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