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Zelenka T, Baláž M, Férová M, Diko P, Bednarčík J, Királyová A, Zauška Ľ, Bureš R, Sharda P, Király N, Badač A, Vyhlídalová J, Želinská M, Almáši M. The influence of HKUST-1 and MOF-76 hand grinding/mechanical activation on stability, particle size, textural properties and carbon dioxide sorption. Sci Rep 2024; 14:15386. [PMID: 38965298 PMCID: PMC11224341 DOI: 10.1038/s41598-024-66432-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2024] [Accepted: 07/01/2024] [Indexed: 07/06/2024] Open
Abstract
In this study, we explore the mechanical treatment of two metal-organic frameworks (MOFs), HKUST-1 and MOF-76, applying various milling methods to assess their impact on stability, porosity, and CO2 adsorption capacity. The effects of different mechanical grinding techniques, such as high-energy ball milling and hand grinding, on these MOFs were compared. The impact of milling time, milling speed and ball size during high-energy ball milling was assessed via the Design of Experiments methodology, namely using a 33 Taguchi orthogonal array. The results highlight a marked improvement in CO2 adsorption capacity for HKUST-1 through hand milling, increasing from an initial 25.70 wt.% (5.84 mmol g-1) to 41.37 wt.% (9.40 mmol g-1), marking a significant 38% increase. In contrast, high-energy ball milling seems to worsen this property, diminishing the CO2 adsorption abilities of the materials. Notably, MOF-76 shows resistance to hand grinding, closely resembling the original sample's performance. Hand grinding also proved to be well reproducible. These findings clarify the complex effects of mechanical milling on MOF materials, emphasising the necessity of choosing the proper processing techniques to enhance their stability, texture, and performance in CO2 capture and storage applications.
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Affiliation(s)
- Tomáš Zelenka
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. Dubna 22, 702 00, Ostrava, Czech Republic
| | - Matej Baláž
- Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 040 01, Košice, Slovak Republic
| | - Marta Férová
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. Dubna 22, 702 00, Ostrava, Czech Republic
| | - Pavel Diko
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01, Košice, Slovak Republic
| | - Jozef Bednarčík
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01, Košice, Slovak Republic
| | - Alexandra Királyová
- Department of Inorganic Chemistry, Faculty of Science, P. J. Šafárik University, Moyzesova 11, 041 01, Košice, Slovak Republic
| | - Ľuboš Zauška
- Department of Inorganic Chemistry, Faculty of Science, P. J. Šafárik University, Moyzesova 11, 041 01, Košice, Slovak Republic
| | - Radovan Bureš
- Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01, Košice, Slovak Republic
| | - Pooja Sharda
- Department of Physics, School of Applied Science, Suresh Gyan Vihar University, Jaipur, I-302017, India
| | - Nikolas Király
- Department of Inorganic Chemistry, Faculty of Science, P. J. Šafárik University, Moyzesova 11, 041 01, Košice, Slovak Republic
| | - Aleš Badač
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. Dubna 22, 702 00, Ostrava, Czech Republic
| | - Jana Vyhlídalová
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. Dubna 22, 702 00, Ostrava, Czech Republic
| | - Milica Želinská
- Department of Inorganic Chemistry, Faculty of Science, P. J. Šafárik University, Moyzesova 11, 041 01, Košice, Slovak Republic
| | - Miroslav Almáši
- Department of Inorganic Chemistry, Faculty of Science, P. J. Šafárik University, Moyzesova 11, 041 01, Košice, Slovak Republic.
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Zelenka T, Zelená L, Abreu-Jaureguí C, Silvestre-Albero J, Zelenková G, Slovák V. On the Low-Pressure Hysteresis (LPH) in Gas Sorption Isotherms of Porous Carbons. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2311990. [PMID: 38712451 DOI: 10.1002/smll.202311990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 04/08/2024] [Indexed: 05/08/2024]
Abstract
This study investigates the origin of low-pressure hysteresis (LPH) in the adsorption and desorption of three different probe molecules: carbon dioxide, nitrogen, and argon, across various adsorption temperatures (from cryogenic to room temperature), and within five different carbon materials: synthetic carbons (pristine and one post-synthetically oxidized) and natural coal. Significant attention is dedicated to elucidating LPH in oxidized samples outgassed at various temperatures (120-350 °C). Experimental results show that insufficient outgassing temperature can lead to unreliable data due to artificial LPH and significantly underestimated textural properties, primarily caused by porosity blockage from substances like moisture. Conversely, in samples where heteroatoms have a stabilizing effect on texture, such as natural coal, careful consideration of outgassing temperature is crucial due to the risk of thermal degradation. Other factors contributing to LPH are adsorption temperature, and especially, kinetic limitations at cryogenic temperatures for cellulose-based carbons. Minor factors responsible for LPH are the physical state of the sample (monolith vs powder) and the flexibility of the porous system, both studied by carbon dioxide sorption. This study constitutes an important piece in the evaluation of LPH, providing practical recommendations and underlining the importance of experimental design, with implications for further research in this complex field.
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Affiliation(s)
- Tomáš Zelenka
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. dubna 22, Ostrava, CZ-702 00, Czech Republic
| | - Lucie Zelená
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. dubna 22, Ostrava, CZ-702 00, Czech Republic
- Department of Inorganic Chemistry, Faculty of Science, P. J. Šafárik University, Moyzesova 11, Košice, SK-041 01, Slovak Republic
| | - Coset Abreu-Jaureguí
- Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica-Instituto Universitario de Materiales, Universidad de Alicante, San Vicente del Raspeig, E-03690, Spain
| | - Joaquin Silvestre-Albero
- Laboratorio de Materiales Avanzados, Departamento de Química Inorgánica-Instituto Universitario de Materiales, Universidad de Alicante, San Vicente del Raspeig, E-03690, Spain
| | - Gabriela Zelenková
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. dubna 22, Ostrava, CZ-702 00, Czech Republic
| | - Václav Slovák
- Department of Chemistry, Faculty of Science, University of Ostrava, 30. dubna 22, Ostrava, CZ-702 00, Czech Republic
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