Correlating MOF-808 parameters with mixed-matrix membrane (MMM) CO<sub>2</sub> permeation for a more rational MMM development

Thür, Raymond; Havere, Daan Van; Velthoven, Niels Van; Smolders, Simon; Lamaire, Aran; Wieme, Jelle; Speybroeck, Véronique Van; Vos, Dirk De; Vankelecom, Ivo F.J.

doi:10.1039/d0ta10207e

Cited by 30 publications

(15 citation statements)

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“…As previously discussed, rational pairing involves the exploitation of specific attributes of filler materials to complement the limitations of polymer matrices (see Section 5). For example, Thür et al recently found that the CO 2 adsorption enthalpy (Q st ) of MOF-808 gave a stronger correlation to the performance of MMMs as opposed to its intrinsic CO 2 uptake, suggesting a possibility of thoughtful design of MOF-based MMMs by leveraging proven structural-performance indicators [151]. Furthermore, considering that the polymer matrices have a strong influence over the MMM performance (see discussion in Section 5), our group recently attempted to decouple the polymer matrix effect, and proposed a filler enhancement index (F index ) that illuminates the true effectiveness of the filler by considering both permeability and selectivity enhancements for CO 2 /CH 4 separation [44].…”

Section: Discussionmentioning

confidence: 99%

Recent Progress in Mixed-Matrix Membranes for Hydrogen Separation

et al. 2021

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Membrane separation is a compelling technology for hydrogen separation. Among the different types of membranes used to date, the mixed-matrix membranes (MMMs) are one of the most widely used approaches for enhancing separation performances and surpassing the Robeson upper bound limits for polymeric membranes. In this review, we focus on the recent progress in MMMs for hydrogen separation. The discussion first starts with a background introduction of the current hydrogen generation technologies, followed by a comparison between the membrane technology and other hydrogen purification technologies. Thereafter, state-of-the-art MMMs, comprising emerging filler materials that include zeolites, metal-organic frameworks, covalent organic frameworks, and graphene-based materials, are highlighted. The binary filler strategy, which uses two filler materials to create synergistic enhancements in MMMs, is also described. A critical evaluation on the performances of the MMMs is then considered in context, before we conclude with our perspectives on how MMMs for hydrogen separation can advance moving forward.

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Section: Discussionmentioning

confidence: 99%

Recent Progress in Mixed-Matrix Membranes for Hydrogen Separation

et al. 2021

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“…MOF-808 was synthesized as described in our previous study [37]. First, 182 mL H 2 O was used to dissolve 5.08 g (24.2 mmol) BTC and 23.4 g (72.8 mmol) ZrOCl 2 •8H 2 O in a 500 mL round-bottom flask and subsequently 26.8 mL (712 mmol) FA was added.…”

Section: Mof Synthesismentioning

confidence: 99%

MOF/Polymer Mixed-Matrix Membranes Preparation: Effect of Main Synthesis Parameters on CO2/CH4 Separation Performance

2022

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Design and preparation of mixed-matrix membranes (MMMs) with minimum defects and high performance for desired gas separations is still challenging as it depends on a variety of MMM synthesis parameters. In this study, 6FDA-DAM:DABA based MMMs using MOF-808 as filler were prepared to examine the impact of multiple variables on the preparation process of MMMs, including variation in polymer concentration, filler loading, volume of solution cast per membrane area, solvent type used and solvent evaporation rate, and to identify their impact on the CO2/CH4 separation performance of these membranes. Solvent evaporation rate proved to be the most critical synthesis parameter, directly influencing the performance and visual appearance of the membranes. Although less dominantly influencing the MMM performance, polymer concentration and solution volume also had an important role via control over the casting solution viscosity, particle agglomeration, and particle settling rate. Among all solvents studied, MMMs prepared with chloroform led to the best performance for this polymer-filler system. Chloroform-based MMMs containing 10 and 30 wt.% MOF-808 showed 73% and 62% increase in CO2 permeability, respectively, without a decrease in separation factor compared to unfilled membranes. The results indicate that enhanced gas separation performance of MMMs strongly depends on the cumulative effect of various synthesis parameters rather than individual impact, thus requiring a system-specific design and optimization.

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“…We have previously investigated the effect of the node-capping modulator in MOF-808 on water sorption and the detoxification of chemical warfare agents, observing significant variance in MOF behavior depending on which modulator was used during synthesis. While the influence of capping group identity on CO 2 sorption in MOF-808 has been probed using postsynthetic substitution reactions, − we are not aware of any studies varying the modulator during synthesis for the purpose of investigating CO 2 adsorption mechanisms. Further, MOF-808 has been synthesized using a variety of modulators, making it a promising platform for studying these effects.…”

Section: Introductionmentioning

confidence: 99%

Unveiling Unexpected Modulator-CO₂ Dynamics within a Zirconium Metal–Organic Framework

et al. 2023

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Carbon capture, storage, and utilization (CCSU) represents an opportunity to mitigate carbon emissions that drive global anthropogenic climate change. Promising materials for CCSU through gas adsorption have been developed by leveraging the porosity, stability, and tunability of extended crystalline coordination polymers called metal−organic frameworks (MOFs). While the development of these frameworks has yielded highly effective CO 2 sorbents, an in-depth understanding of the properties of MOF pores that lead to the most efficient uptake during sorption would benefit the rational design of more efficient CCSU materials. Though previous investigations of gas−pore interactions often assumed that the internal pore environment was static, discovery of more dynamic behavior represents an opportunity for precise sorbent engineering. Herein, we report a multifaceted in situ analysis following the adsorption of CO 2 in MOF-808 variants with different capping agents (formate, acetate, and trifluoroacetate: FA, AA, and TFA, respectively). In situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) analysis paired with multivariate analysis tools and in situ powder X-ray diffraction revealed unexpected CO 2 interactions at the node associated with dynamic behavior of node-capping modulators in the pores of MOF-808, which had previously been assumed to be static. MOF-808-TFA displays two binding modes, resulting in higher binding affinity for CO 2 . Computational analyses further support these dynamic observations. The beneficial role of these structural dynamics could play an essential role in building a deeper understanding of CO 2 binding in MOFs.

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Correlating MOF-808 parameters with mixed-matrix membrane (MMM) CO₂ permeation for a more rational MMM development

Abstract: Consistent structure-performance relationships for the design of MOF (metal-organic framework)-based mixed-matrix membranes (MMMs) for gas separation are currently scarce in MMM literature. An important step in establishing such relationships could...

Cited by 30 publications

References 82 publications

Recent Progress in Mixed-Matrix Membranes for Hydrogen Separation

Recent Progress in Mixed-Matrix Membranes for Hydrogen Separation

MOF/Polymer Mixed-Matrix Membranes Preparation: Effect of Main Synthesis Parameters on CO2/CH4 Separation Performance

Unveiling Unexpected Modulator-CO₂ Dynamics within a Zirconium Metal–Organic Framework

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Correlating MOF-808 parameters with mixed-matrix membrane (MMM) CO2 permeation for a more rational MMM development

Abstract: Consistent structure-performance relationships for the design of MOF (metal-organic framework)-based mixed-matrix membranes (MMMs) for gas separation are currently scarce in MMM literature. An important step in establishing such relationships could...

Cited by 30 publications

References 82 publications

Recent Progress in Mixed-Matrix Membranes for Hydrogen Separation

Recent Progress in Mixed-Matrix Membranes for Hydrogen Separation

MOF/Polymer Mixed-Matrix Membranes Preparation: Effect of Main Synthesis Parameters on CO2/CH4 Separation Performance

Unveiling Unexpected Modulator-CO2 Dynamics within a Zirconium Metal–Organic Framework

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Correlating MOF-808 parameters with mixed-matrix membrane (MMM) CO₂ permeation for a more rational MMM development

Unveiling Unexpected Modulator-CO₂ Dynamics within a Zirconium Metal–Organic Framework