Synthesis and characterisation of MOF/ionic liquid/chitosan mixed matrix membranes for CO<sub>2</sub>/N<sub>2</sub> separation

Casado-Coterillo, Clara; Fernández-Barquín, Ana; Zornoza, Beatriz; Téllez, Carlos; Coronas, Joaquı́n; Irabien, Ángel

doi:10.1039/c5ra19331a

Cited by 109 publications

(73 citation statements)

References 70 publications

(108 reference statements)

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“…b, the HKUST‐1/IL‐CS‐based membranes are observed. The HKUST‐1 nanoparticles were found homogeneously dispersed all along the perimeter of the outer layer of the CHF membrane, and very well dispersed in the selective layer of the composite flat membrane, as the Cu from HKUST‐1 was homogeneously distributed throughout the dense IL‐CS unsupported membrane . As to the zeolite A/PTMSP‐based membranes (Fig.…”

Section: Resultsmentioning

confidence: 90%

“…The permeation data in Tab. also demonstrates that one coating is insufficient to achieve a membrane as selective as the dense homogeneous unsupported IL‐CS hybrid membrane , . The thickness of the ZIF‐8/6FDA‐DAM layer coated on 6FDA‐DAM HF membrane presented by Zhang et al has to be at least 7–12 µm to assure adhesion and avoid defects.…”

Section: Resultsmentioning

confidence: 99%

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Comparison of Flat and Hollow‐Fiber Mixed‐Matrix Composite Membranes for CO₂ Separation with Temperature

et al. 2017

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Zeolite A/poly (1‐trimethylsilyl‐1‐propyne) (zeoliteA/PTMSP) and [emim][Ac]/chitosan (IL/CS) are mixed‐matrix membrane (MMM) materials with enhanced CO2/N2 permselectivity even at higher temperature. The scalability to asymmetric flat and hollow‐fiber geometry by a simple dip‐coating method was analyzed. The CO2/N2 separation performance was evaluated at different temperatures. The resulting composite membranes exhibit a significantly enhanced CO2 permeation flux because the MMM layer thickness is reduced by 97 % from flat to hollow‐fiber geometries in IL‐CS composite membranes, while the selectivity is maintained similar to the self‐standing membranes, thus proving that compatibility between the membrane component materials leads to a defect‐free composite membrane, regardless the geometry and temperature.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Comparison of Flat and Hollow‐Fiber Mixed‐Matrix Composite Membranes for CO₂ Separation with Temperature

et al. 2017

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“…[8][9] IL-MOF combinations have been considered recently in the gas separation field. [10][11][12][13][14][15][16] For instance, Chen et al 17 incorporated IRMOF-1 composite and reported a CO 2 /N 2 selectivity of 70 at ambient conditions. To understand the effect of different types of ILs on the separation performances of IL-MOF systems, ILs with the same cations but different anions were studied.…”

Section: Introductionmentioning

confidence: 97%

Improving Gas Separation Performance of ZIF-8 by [BMIM][BF₄] Incorporation: Interactions and Their Consequences on Performance

et al. 2017

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Gas separation performance of zeolitic imidazolate framework (ZIF-8) was improved by incorporating an ionic liquid (IL), 1-n-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF 4 ]). Detailed characterization based on X-ray diffraction (XRD) and scanning electron microscopy (SEM) confirmed that the morphology of ZIF-8 remains intact upon IL incorporation up to 28 wt%. Thermogravimetric analysis indicated the presence of direct interactions between the IL and metal organic framework (MOF). FTIR spectroscopy illustrated that the anion of the IL was shared between the imidazolate framework and[BMIM] + cation. Adsorption isotherms of CO 2 , CH 4 , and N 2 measured for pristine ZIF-8 and IL-loaded ZIF-8 samples, complemented by Grand Canonical Monte Carlo (GCMC) simulations, showed that these interactions influence the gas uptake performance of ZIF-8. CH 4 and N 2 uptakes decreased in the whole pressure range, while CO 2 uptake first increased by approximately 9% at 0.1 bar in 20 wt% IL-loaded sample, and then, decreased as in the case of other gases. As a result of these changes in gas uptakes occurring at different extend, the corresponding CO 2 /CH 4 , CO 2 /N 2 , and CH 4 /N 2 selectivities enhanced especially at low pressure regime upon IL incorporation. Results showed that CO 2 /CH 4 selectivity increased from 2.2 to 4, while CO 2 /N 2 selectivity more than doubled from 6.5 to 13.3, and CH 4 /N 2 selectivity improved from 3 to 3.4 at 0.1 bar at an IL loading of 28 wt%. The heat of adsorption values (Q st ) measured and simulated for each gas on each sample indicated that interactions between the IL and ZIF-8 strongly influence the gas adsorption behaviors. The change in Q st of CO 2 upon IL-incorporation was more significant than that of other gases, leading to an almost doubling of CO 2 selectivity over CH 4 and N 2 , specifically at low pressures. On the other hand, the selectivity improvement was lost at high pressures because of a strong decrease in the available pore space due to the presence of IL in ZIF-8. These results suggest that such IL/MOF combinations with tunable structures have huge potential towards high performance gas separation applications.

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“…In order to form successful MMMs, one must maintain flexibility during membrane formation (the use of high temperatures) and interaction between polymer and sieve phase (chemical coupling) [39,51,52].…”

Section: Pi-thementioning

confidence: 99%

Modeling of Gas Permeation through Mixed-Matrix Membranes Using Novel Computer Application MOT

Rybak

Sysel

2018

Applied Sciences

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Abstract:The following article proposes a modern computer application MOT (Membrane Optimization Tool) for modeling of gas transport processes through mixed-matrix membranes (MMMs). The current version of the application is based on the Maxwell model, which can be successfully used to model gas transport through the simplest types of hybrid membranes without any defects. The application has been verified on the example of four types of hybrid membranes, consisting of various types of polymer matrix, such as: poly (vinyl acetate), 2, 2 -BAPB + BPADA, Ultem, hyperbranched polyimide (ODPA-MTA) and zeolite 4A. The average absolute relative error (AARE) and root-mean-square error (RMSE) were calculated in order to compare the theoretical MOT-predicted results with the experimental results. It was found that the AARE ranges from 29% to 36%, while the RMSE is in the range of 10% to 29%. The article presents also the comparison of MOT-predicted data obtained with Maxwell and Bruggeman models. To obtain more accurate reproduction of experimental results, further versions of the proposed application will be extended with next-generation permeation models (Lewis-Nielsen, Pal, modified Maxwell or Felske models), allowing for the description of transport in more complex systems with the possibility of taking into account possible defects.

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Synthesis and characterisation of MOF/ionic liquid/chitosan mixed matrix membranes for CO₂/N₂ separation

Abstract: The CO2 permeability and CO2/N2 selectivity of IL–CS membranes is improved by adding nano-HKUST-1 and ZIF-8, and predicted accurately by Maxwell-derived model as a function of interfacial contact, crystallinity and pore blockage with temperature.

Cited by 109 publications

References 70 publications

Comparison of Flat and Hollow‐Fiber Mixed‐Matrix Composite Membranes for CO₂ Separation with Temperature

Comparison of Flat and Hollow‐Fiber Mixed‐Matrix Composite Membranes for CO₂ Separation with Temperature

Improving Gas Separation Performance of ZIF-8 by [BMIM][BF₄] Incorporation: Interactions and Their Consequences on Performance

Modeling of Gas Permeation through Mixed-Matrix Membranes Using Novel Computer Application MOT

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Synthesis and characterisation of MOF/ionic liquid/chitosan mixed matrix membranes for CO2/N2 separation

Abstract: The CO2 permeability and CO2/N2 selectivity of IL–CS membranes is improved by adding nano-HKUST-1 and ZIF-8, and predicted accurately by Maxwell-derived model as a function of interfacial contact, crystallinity and pore blockage with temperature.

Cited by 109 publications

References 70 publications

Comparison of Flat and Hollow‐Fiber Mixed‐Matrix Composite Membranes for CO2 Separation with Temperature

Comparison of Flat and Hollow‐Fiber Mixed‐Matrix Composite Membranes for CO2 Separation with Temperature

Improving Gas Separation Performance of ZIF-8 by [BMIM][BF4] Incorporation: Interactions and Their Consequences on Performance

Modeling of Gas Permeation through Mixed-Matrix Membranes Using Novel Computer Application MOT

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Synthesis and characterisation of MOF/ionic liquid/chitosan mixed matrix membranes for CO₂/N₂ separation

Comparison of Flat and Hollow‐Fiber Mixed‐Matrix Composite Membranes for CO₂ Separation with Temperature

Comparison of Flat and Hollow‐Fiber Mixed‐Matrix Composite Membranes for CO₂ Separation with Temperature

Improving Gas Separation Performance of ZIF-8 by [BMIM][BF₄] Incorporation: Interactions and Their Consequences on Performance