Influence of casting solvents on sedimentation and performance in metal–organic framework mixed-matrix membranes

Chang, Yi Wei

doi:10.1016/j.jtice.2018.05.006

Cited by 16 publications

(6 citation statements)

References 26 publications

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“…According to Chang Y.-W. and Chang B.K. [ 60 ], another aspect to be considered for the sedimentation phenomena is the viscosity of the polymer dope. Sedimentation easily occurs with lower polymer dope viscosity as it is not enough to keep the filler suspended during phase separation.…”

Section: Resultsmentioning

confidence: 99%

Polydimethylsiloxane/Magnesium Oxide Nanosheet Mixed Matrix Membrane for CO2 Separation Application

2023

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Carbon dioxide (CO2) concentration is now 50% higher than in the preindustrial period and efforts to reduce CO2 emission through carbon capture and utilization (CCU) are blooming. Membranes are one of the attractive alternatives for such application. In this study, a rubbery polymer polydimethylsiloxane (PDMS) membrane is incorporated with magnesium oxide (MgO) with a hierarchically two-dimensional (2D) nanosheet shape for CO2 separation. The average thickness of the synthesized MgO nanosheet in this study is 35.3 ± 1.5 nm. Based on the pure gas separation performance, the optimal loading obtained is at 1 wt.% where there is no observable significant agglomeration. CO2 permeability was reduced from 2382 Barrer to 1929 Barrer while CO2/N2 selectivity increased from only 11.4 to 12.7, and CO2/CH4 remained relatively constant when the MMM was operated at 2 bar and 25 °C. Sedimentation of the filler was observed when the loading was further increased to 5 wt.%, forming interfacial defects on the bottom side of the membrane and causing increased CO2 gas permeability from 1929 Barrer to 2104 Barrer as compared to filler loading at 1 wt.%, whereas the CO2/N2 ideal selectivity increased from 12.1 to 15.0. Additionally, this study shows that there was no significant impact of pressure on separation performance. There was a linear decline of CO2 permeability with increasing upstream pressure while there were no changes to the CO2/N2 and CO2/CH4 selectivity.

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Section: Resultsmentioning

confidence: 99%

Polydimethylsiloxane/Magnesium Oxide Nanosheet Mixed Matrix Membrane for CO2 Separation Application

2023

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“…Here, we emphasize that in the ubiquitous ZIF/polymer system, there are usually three patterns of filler distribution, which were comprehensively studied by Chang et al . For low‐, moderate‐, and high‐viscosity casting solvents, the membrane morphology is shown in Figure (a–c), respectively.…”

Section: Sole‐zif‐based Mixed Matrix Membranesmentioning

confidence: 96%

“…Schematic of filler dispersion pattern for ZIF‐based MMMs . [Color figure can be viewed at wileyonlinelibrary.com]…”

Section: Sole‐zif‐based Mixed Matrix Membranesmentioning

confidence: 99%

Zeolite imidazolate framework (ZIF)‐based mixed matrix membranes for CO₂ separation: A review

Guan

Dai

Dong

et al. 2020

J of Applied Polymer Sci

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Mixed matrix membranes (MMMs), which combine the good separation performance of inorganic materials with the low cost of polymers, have emerged as a research hotspot for gas separation membranes. Zeolite imidazolate frameworks (ZIFs) are widely used as fillers to prepare MMMs owing to their advantageous characteristics, such as adjustable pore channels, unsaturated sites, and easy functionalization. For MMMs, three directions can be employed as criteria for improvement compared with pristine polymeric membranes. In this article, the progress of ZIF-based MMMs is reviewed from the aspects of sole-ZIF-based MMMs and modified ZIFbased MMMs. Both strategies improve the separation performance through different improvement directions and mechanisms. Our analysis shows that the synergistic effect of the modified filler can change the structure of the membranes, such as by improving the filler-polymer interface voids, which provides a foundation to overcome the trade-off effect to a certain extent.

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“…Several MMMs have been examined previously, based upon a different variety of MOFs and polymers [ 142 , 143 , 144 , 145 , 146 ] and also, several reviews are available already on this topic [ 10 , 146 , 147 ]. The addition of many different varieties of MOFs such as Bio-MOF-1 [ 147 ], MIL-53 (Al) [ 148 ], MIL-101 (Cr) [ 149 ] and Cu 3 (BTC) 2 [ 150 ] have produced beneficial results regarding gas permeabilities as well as selectivities.…”

Section: Mixed Matrix Membranesmentioning

confidence: 99%

Challenges, Opportunities and Future Directions of Membrane Technology for Natural Gas Purification: A Critical Review

Imtiaz

Othman

Jilani³

et al. 2022

Membranes

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Natural gas is an important and fast-growing energy resource in the world and its purification is important in order to reduce environmental hazards and to meet the required quality standards set down by notable pipeline transmission, as well as distribution companies. Therefore, membrane technology has received great attention as it is considered an attractive option for the purification of natural gas in order to remove impurities such as carbon dioxide (CO2) and hydrogen sulphide (H2S) to meet the usage and transportation requirements. It is also recognized as an appealing alternative to other natural gas purification technologies such as adsorption and cryogenic processes due to its low cost, low energy requirement, easy membrane fabrication process and less requirement for supervision. During the past few decades, membrane-based gas separation technology employing hollow fibers (HF) has emerged as a leading technology and underwent rapid growth. Moreover, hollow fiber (HF) membranes have many advantages including high specific surface area, fewer requirements for maintenance and pre-treatment. However, applications of hollow fiber membranes are sometimes restricted by problems related to their low tensile strength as they are likely to get damaged in high-pressure applications. In this context, braid reinforced hollow fiber membranes offer a solution to this problem and can enhance the mechanical strength and lifespan of hollow fiber membranes. The present review includes a discussion about different materials used to fabricate gas separation membranes such as inorganic, organic and mixed matrix membranes (MMM). This review also includes a discussion about braid reinforced hollow fiber (BRHF) membranes and their ability to be used in natural gas purification as they can tackle high feed pressure and aggressive feeds without getting damaged or broken. A BRHF membrane possesses high tensile strength as compared to a self-supported membrane and if there is good interfacial bonding between the braid and the separation layer, high tensile strength, i.e., upto 170Mpa can be achieved, and due to these factors, it is expected that BRHF membranes could give promising results when used for the purification of natural gas.

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Influence of casting solvents on sedimentation and performance in metal–organic framework mixed-matrix membranes

Cited by 16 publications

References 26 publications

Polydimethylsiloxane/Magnesium Oxide Nanosheet Mixed Matrix Membrane for CO2 Separation Application

Polydimethylsiloxane/Magnesium Oxide Nanosheet Mixed Matrix Membrane for CO2 Separation Application

Zeolite imidazolate framework (ZIF)‐based mixed matrix membranes for CO₂ separation: A review

Challenges, Opportunities and Future Directions of Membrane Technology for Natural Gas Purification: A Critical Review

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Influence of casting solvents on sedimentation and performance in metal–organic framework mixed-matrix membranes

Cited by 16 publications

References 26 publications

Polydimethylsiloxane/Magnesium Oxide Nanosheet Mixed Matrix Membrane for CO2 Separation Application

Polydimethylsiloxane/Magnesium Oxide Nanosheet Mixed Matrix Membrane for CO2 Separation Application

Zeolite imidazolate framework (ZIF)‐based mixed matrix membranes for CO2 separation: A review

Challenges, Opportunities and Future Directions of Membrane Technology for Natural Gas Purification: A Critical Review

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Zeolite imidazolate framework (ZIF)‐based mixed matrix membranes for CO₂ separation: A review