Study of Water Adsorption on EDTA-Modified LTA Zeolites

The present work deals with the study of water adsorption on acid-modified zeolites A. Commercial zeolites 4A (Na form) and 5A (Ca form) were subjected to EDTA dealumination, and their structure, textural properties and stability were checked by XRD, EDX, NMR and N(2) physisorption analyses. The wat...

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Detalles Bibliográficos
Autores principales: Volavšek, Janez, Pliekhov, Oleksii, Pliekhova, Olena, Mali, Gregor, Zabukovec Logar, Nataša
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9027755/
https://www.ncbi.nlm.nih.gov/pubmed/35458059
http://dx.doi.org/10.3390/nano12081352
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author Volavšek, Janez
Pliekhov, Oleksii
Pliekhova, Olena
Mali, Gregor
Zabukovec Logar, Nataša
author_facet Volavšek, Janez
Pliekhov, Oleksii
Pliekhova, Olena
Mali, Gregor
Zabukovec Logar, Nataša
author_sort Volavšek, Janez
collection PubMed
description The present work deals with the study of water adsorption on acid-modified zeolites A. Commercial zeolites 4A (Na form) and 5A (Ca form) were subjected to EDTA dealumination, and their structure, textural properties and stability were checked by XRD, EDX, NMR and N(2) physisorption analyses. The water adsorption isotherms of the parent zeolites and their modified forms were measured at a temperature of 25 °C and up to a relative pressure of 0.9. The results show that the treatment with EDTA drastically changes the structural properties of the zeolites and increases the water adsorption capacity by up to 10%. The changes depend on the type of extra-framework cations (Na(+) and Ca(2+)) and the EDTA concentration.
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spelling pubmed-90277552022-04-23 Study of Water Adsorption on EDTA-Modified LTA Zeolites Volavšek, Janez Pliekhov, Oleksii Pliekhova, Olena Mali, Gregor Zabukovec Logar, Nataša Nanomaterials (Basel) Article The present work deals with the study of water adsorption on acid-modified zeolites A. Commercial zeolites 4A (Na form) and 5A (Ca form) were subjected to EDTA dealumination, and their structure, textural properties and stability were checked by XRD, EDX, NMR and N(2) physisorption analyses. The water adsorption isotherms of the parent zeolites and their modified forms were measured at a temperature of 25 °C and up to a relative pressure of 0.9. The results show that the treatment with EDTA drastically changes the structural properties of the zeolites and increases the water adsorption capacity by up to 10%. The changes depend on the type of extra-framework cations (Na(+) and Ca(2+)) and the EDTA concentration. MDPI 2022-04-14 /pmc/articles/PMC9027755/ /pubmed/35458059 http://dx.doi.org/10.3390/nano12081352 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Volavšek, Janez
Pliekhov, Oleksii
Pliekhova, Olena
Mali, Gregor
Zabukovec Logar, Nataša
Study of Water Adsorption on EDTA-Modified LTA Zeolites
title Study of Water Adsorption on EDTA-Modified LTA Zeolites
title_full Study of Water Adsorption on EDTA-Modified LTA Zeolites
title_fullStr Study of Water Adsorption on EDTA-Modified LTA Zeolites
title_full_unstemmed Study of Water Adsorption on EDTA-Modified LTA Zeolites
title_short Study of Water Adsorption on EDTA-Modified LTA Zeolites
title_sort study of water adsorption on edta-modified lta zeolites
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9027755/
https://www.ncbi.nlm.nih.gov/pubmed/35458059
http://dx.doi.org/10.3390/nano12081352
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