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<sub>2</sub> physisorpt...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/8/1352 |
| _version_ | 1797444466589564928 |
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| author | Janez Volavšek Oleksii Pliekhov Olena Pliekhova Gregor Mali Nataša Zabukovec Logar |
| author_facet | Janez Volavšek Oleksii Pliekhov Olena Pliekhova Gregor Mali Nataša Zabukovec Logar |
| author_sort | Janez Volavšek |
| collection | DOAJ |
| 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<sub>2</sub> 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<sup>+</sup> and Ca<sup>2+</sup>) and the EDTA concentration. |
| first_indexed | 2024-03-09T13:13:00Z |
| format | Article |
| id | doaj.art-dfb54923ca404c04adb848fe80be3258 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T13:13:00Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-dfb54923ca404c04adb848fe80be32582023-11-30T21:40:11ZengMDPI AGNanomaterials2079-49912022-04-01128135210.3390/nano12081352Study of Water Adsorption on EDTA-Modified LTA ZeolitesJanez Volavšek0Oleksii Pliekhov1Olena Pliekhova2Gregor Mali3Nataša Zabukovec Logar4National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, SloveniaNational Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, SloveniaSchool of Science, University of Nova Gorica, Vipavska 13, 5000 Nova Gorica, SloveniaNational Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, SloveniaNational Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, SloveniaThe 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<sub>2</sub> 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<sup>+</sup> and Ca<sup>2+</sup>) and the EDTA concentration.https://www.mdpi.com/2079-4991/12/8/13524A zeolite5A zeoliteLTA topologywater adsorptionEDTA dealumination<sup>27</sup>Al NMR |
| spellingShingle | Janez Volavšek Oleksii Pliekhov Olena Pliekhova Gregor Mali Nataša Zabukovec Logar Study of Water Adsorption on EDTA-Modified LTA Zeolites Nanomaterials 4A zeolite 5A zeolite LTA topology water adsorption EDTA dealumination <sup>27</sup>Al NMR |
| 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 | 4A zeolite 5A zeolite LTA topology water adsorption EDTA dealumination <sup>27</sup>Al NMR |
| url | https://www.mdpi.com/2079-4991/12/8/1352 |
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