1
|
Zhao H, Silva JAC, Henrique A, Nouar F, Serre C, Maurin G, Ghoufi A. Adsorption and dynamics of linear and mono-branched hexane isomers in MIL-140 metal-organic frameworks. Phys Chem Chem Phys 2023; 25:12057-12064. [PMID: 37092645 DOI: 10.1039/d2cp05371c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
Recent breakthrough experiments revealed the iso-reticular Zr-MOFs, MIL-140B and MIL-140C, as promising sorbents for the separation of C6 isomers. Interestingly while the ultra-small pore MIL-140B exhibited hexane isomer sorption hierarchy according to the normal boiling point order (n-C6 > 3MP (3-methyl pentane)), an uncommon shift in the elution order was observed in the larger pore MIL-140C. It was only speculated that the flexibility of the MOFs might be the origin of this intriguing behavior. Herein, flexible force field hybrid osmotic Monte Carlo combined with molecular dynamics simulations were carried out to unravel the microscopic mechanism of the adsorption and dynamics of both C6 isomers in MIL140B and MIL140C. Thermodynamically preferred adsorption of n-C6 over 3MP was predicted for MIL-140B and to a slightly less extent for MIL-140C. Interestingly while the mobility of n-C6 was found to remain higher than that of 3MP in the whole range of loading for MIL-140B, 3MP becomes more mobile than n-C6 at saturation in MIL-140C. This suggests that this kinetics order is most probably the origin of the inversion of the elution order observed experimentally for MIL-140C. The translational and rotational dynamics of the two guests in MIL-140B and MIL-140C was further understood in-depth.
Collapse
Affiliation(s)
- Hengli Zhao
- Institut de Physique de Rennes, IPR, CNRS-Université de Rennes 1, UMR CNRS 6251, Rennes 35042, France.
- ICGM, Univ. Montpellier, CNRS, ENSCM, Montpellier 34293, France
| | - José A C Silva
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, Bragança 5300-253, Portugal
- 2Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, Bragança 5300-253, Portugal
| | - Adriano Henrique
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Campus de Santa Apolónia, Bragança 5300-253, Portugal
- 2Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, Campus de Santa Apolónia, Bragança 5300-253, Portugal
| | - Farid Nouar
- Institut des Matériaux Poreux de Paris, Ecole Normale Supérieure de Paris, ESPCI Paris, CNRS, PSL University, Paris 75005, France
| | - Christian Serre
- Institut des Matériaux Poreux de Paris, Ecole Normale Supérieure de Paris, ESPCI Paris, CNRS, PSL University, Paris 75005, France
| | | | - Aziz Ghoufi
- Institut de Physique de Rennes, IPR, CNRS-Université de Rennes 1, UMR CNRS 6251, Rennes 35042, France.
| |
Collapse
|
2
|
Zhao H, Maurin G, Ghoufi A. Tuning the hexane isomer separation performances of Zeolitic Imidazole Framework-8 using mechanical pressure. J Chem Phys 2021; 154:084702. [PMID: 33639767 DOI: 10.1063/5.0040469] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Hybrid osmotic Monte Carlo simulations were performed to anticipate the tunability of the separation performance of the flexible Zeolitic Imidazole Framework-8 (ZIF-8) via the application of an external mechanical pressure. This synergistic combination of mechanical control of the pore aperture/cage dimension and guest adsorption was applied to the challenging hexane isomers separation processes of vital importance in the field of petrochemical industry. The application of a mechanical pressure above 1 GPa was predicted to boost the linear hexane/2-methylpentane and 2-methylpentane/2,3-dimethylbutane selectivity by 40% and 17%, respectively, as compared to the pristine ZIF-8. We further unraveled the microscopic origin of this optimized performance with an in-depth analysis of the critical interplay between the structural changes of the ZIF-8 framework and the conformational rearrangements of C6 isomers under mechanical pressure.
Collapse
Affiliation(s)
- Henglo Zhao
- Institut de Physique de Rennes, IPR, CNRS-Université de Rennes 1, UMR CNRS 6251, 35042 Rennes, France
| | | | - Aziz Ghoufi
- Institut de Physique de Rennes, IPR, CNRS-Université de Rennes 1, UMR CNRS 6251, 35042 Rennes, France
| |
Collapse
|
3
|
Hybridization of metal–organic framework and monodisperse spherical silica for chromatographic separation of xylene isomers. Chin J Chem Eng 2019. [DOI: 10.1016/j.cjche.2018.06.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
4
|
Characterization of mesoporous silica used for drug delivery by sorptive interaction – multiple headspace extraction–gas chromatography. Talanta 2018; 187:35-39. [DOI: 10.1016/j.talanta.2018.05.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 04/25/2018] [Accepted: 05/01/2018] [Indexed: 12/13/2022]
|
5
|
Mukherjee S, Desai AV, Ghosh SK. Potential of metal–organic frameworks for adsorptive separation of industrially and environmentally relevant liquid mixtures. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2018.04.001] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
6
|
Separation properties of the MIL-125(Ti) Metal-Organic Framework in high-performance liquid chromatography revealing cis/trans selectivity. J Chromatogr A 2016; 1469:68-76. [DOI: 10.1016/j.chroma.2016.09.057] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 09/15/2016] [Accepted: 09/23/2016] [Indexed: 11/18/2022]
|