Hydrocarbon Sorption in Flexible MOFs—Part II: Understanding Adsorption Kinetics
The rate of sorption of <i>n</i>-butane on the structurally flexible metal-organic framework [Cu<sub>2</sub>(H-Me-trz-ia)<sub>2</sub>], including its complete structural transition between a narrow-pore phase and a large-pore phase, was studied by sorption gravime...
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| Format: | Article |
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MDPI AG
2023-02-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/3/601 |
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| author | Hannes Preißler-Kurzhöfer Andrei Kolesnikov Marcus Lange Jens Möllmer Oliver Erhart Merten Kobalz Seungtaik Hwang Christian Chmelik Harald Krautscheid Roger Gläser |
| author_facet | Hannes Preißler-Kurzhöfer Andrei Kolesnikov Marcus Lange Jens Möllmer Oliver Erhart Merten Kobalz Seungtaik Hwang Christian Chmelik Harald Krautscheid Roger Gläser |
| author_sort | Hannes Preißler-Kurzhöfer |
| collection | DOAJ |
| description | The rate of sorption of <i>n</i>-butane on the structurally flexible metal-organic framework [Cu<sub>2</sub>(H-Me-trz-ia)<sub>2</sub>], including its complete structural transition between a narrow-pore phase and a large-pore phase, was studied by sorption gravimetry, IR spectroscopy, and powder X-ray diffraction at close to ambient temperature (283, 298, and 313 K). The uptake curves reveal complex interactions of adsorption on the outer surface of MOF particles, structural transition, of which the overall rate depends on several factors, including pressure step, temperature, as well as particle size, and the subsequent diffusion into newly opened pores. With the aid of a kinetic model based on the linear driving force (LDF) approach, both rates of diffusion and structural transition were studied independently of each other. It is shown that temperature and applied pressure steps have a strong effect on the rate of structural transition and thus, the overall velocity of gas uptake. For pressure steps close to the upper boundary of the gate-opening, the rate of structural transition is drastically reduced. This feature enables a fine-tuning of the overall velocity of sorption, which can even turn into anti-Arrhenius behavior. |
| first_indexed | 2024-03-11T09:31:12Z |
| format | Article |
| id | doaj.art-44a5cf7671ca49e68f36f8fa290c1a7e |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T09:31:12Z |
| publishDate | 2023-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-44a5cf7671ca49e68f36f8fa290c1a7e2023-11-16T17:37:09ZengMDPI AGNanomaterials2079-49912023-02-0113360110.3390/nano13030601Hydrocarbon Sorption in Flexible MOFs—Part II: Understanding Adsorption KineticsHannes Preißler-Kurzhöfer0Andrei Kolesnikov1Marcus Lange2Jens Möllmer3Oliver Erhart4Merten Kobalz5Seungtaik Hwang6Christian Chmelik7Harald Krautscheid8Roger Gläser9Institut für Technische Chemie, Fakultät für Chemie und Mineralogie, Universität Leipzig, Linnéstraße 3, D-04103 Leipzig, GermanyInstitut für Nichtklassische Chemie e.V., Universität Leipzig, Permoserstraße 15, D-04318 Leipzig, GermanyInstitut für Nichtklassische Chemie e.V., Universität Leipzig, Permoserstraße 15, D-04318 Leipzig, GermanyInstitut für Nichtklassische Chemie e.V., Universität Leipzig, Permoserstraße 15, D-04318 Leipzig, GermanyInstitut für Anorganische Chemie, Fakultät für Chemie und Mineralogie, Universität Leipzig, Johannisallee 21, D-04103 Leipzig, GermanyInstitut für Anorganische Chemie, Fakultät für Chemie und Mineralogie, Universität Leipzig, Johannisallee 21, D-04103 Leipzig, GermanyFakultät für Physik und Geowissenschaften, Universität Leipzig, Linnéstraße 5, D-04103 Leipzig, GermanyFakultät für Physik und Geowissenschaften, Universität Leipzig, Linnéstraße 5, D-04103 Leipzig, GermanyInstitut für Anorganische Chemie, Fakultät für Chemie und Mineralogie, Universität Leipzig, Johannisallee 21, D-04103 Leipzig, GermanyInstitut für Technische Chemie, Fakultät für Chemie und Mineralogie, Universität Leipzig, Linnéstraße 3, D-04103 Leipzig, GermanyThe rate of sorption of <i>n</i>-butane on the structurally flexible metal-organic framework [Cu<sub>2</sub>(H-Me-trz-ia)<sub>2</sub>], including its complete structural transition between a narrow-pore phase and a large-pore phase, was studied by sorption gravimetry, IR spectroscopy, and powder X-ray diffraction at close to ambient temperature (283, 298, and 313 K). The uptake curves reveal complex interactions of adsorption on the outer surface of MOF particles, structural transition, of which the overall rate depends on several factors, including pressure step, temperature, as well as particle size, and the subsequent diffusion into newly opened pores. With the aid of a kinetic model based on the linear driving force (LDF) approach, both rates of diffusion and structural transition were studied independently of each other. It is shown that temperature and applied pressure steps have a strong effect on the rate of structural transition and thus, the overall velocity of gas uptake. For pressure steps close to the upper boundary of the gate-opening, the rate of structural transition is drastically reduced. This feature enables a fine-tuning of the overall velocity of sorption, which can even turn into anti-Arrhenius behavior.https://www.mdpi.com/2079-4991/13/3/601metal–organic frameworkskinetic analysisflexible materials |
| spellingShingle | Hannes Preißler-Kurzhöfer Andrei Kolesnikov Marcus Lange Jens Möllmer Oliver Erhart Merten Kobalz Seungtaik Hwang Christian Chmelik Harald Krautscheid Roger Gläser Hydrocarbon Sorption in Flexible MOFs—Part II: Understanding Adsorption Kinetics Nanomaterials metal–organic frameworks kinetic analysis flexible materials |
| title | Hydrocarbon Sorption in Flexible MOFs—Part II: Understanding Adsorption Kinetics |
| title_full | Hydrocarbon Sorption in Flexible MOFs—Part II: Understanding Adsorption Kinetics |
| title_fullStr | Hydrocarbon Sorption in Flexible MOFs—Part II: Understanding Adsorption Kinetics |
| title_full_unstemmed | Hydrocarbon Sorption in Flexible MOFs—Part II: Understanding Adsorption Kinetics |
| title_short | Hydrocarbon Sorption in Flexible MOFs—Part II: Understanding Adsorption Kinetics |
| title_sort | hydrocarbon sorption in flexible mofs part ii understanding adsorption kinetics |
| topic | metal–organic frameworks kinetic analysis flexible materials |
| url | https://www.mdpi.com/2079-4991/13/3/601 |
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