High-performance gas separation using mixed-matrix composite membranes containing graphene nanoplatelets

Pazani, Farhang; Aroujalian, Abdolreza

doi:10.1007/s00289-020-03467-y

Cited by 9 publications

(10 citation statements)

References 38 publications

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“…In Figure 4, it shows the main characteristic diffraction patterns of Pebax‐1074 at 12° and 21° corresponding for the flexible PE fragments, and 24° corresponding for the rigid PA segments due to the hydrogen bonds between the amide groups and a semi‐crystalline structure 37–38 …”

Section: Resultsmentioning

confidence: 99%

Fabrication of Pebax/SAPO mixed matrix membranes for CO₂/N₂ separation

Zhang

Zheng

et al. 2021

J of Applied Polymer Sci

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Mixed matrix membranes (MMMs) were prepared by solvent evaporation method using Pebax‐1074 polymer as matrix and inorganic zeolite SAPO‐23 as dopant. The morphology, surface functional groups, microstructure, thermal stability, and separation performance of MMMs were analyzed by scanning electron microscopy, Fourier transform infrared spectroscopy, X‐ray diffraction, thermogravimetric analysis, and gas permeation, respectively. The effects of dopant loading amount, permeation temperature, and permeation pressure on the structure and properties of MMMs were investigated. The results showed that the introduction of SAPO zeolite reduced the crystallinity of the MMMs and improved the CO2/N2 selectivity. Under the conditions of 30°C and 0.15 MPa, the MMMs prepared by incorporating with 5% SAPO zeolite in content exhibited the highest CO2/N2 selectivity of 72.0 together with the CO2 permeability of 98.2 Barrer.

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Section: Resultsmentioning

confidence: 99%

Fabrication of Pebax/SAPO mixed matrix membranes for CO₂/N₂ separation

Zhang

Zheng

et al. 2021

J of Applied Polymer Sci

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“…On the other hand, the slight increase of F-gas permeability noticed at higher xGnP concentrations may be due to the fact that xGnP is a sort of material that does not exhibit strong interactions with the polymer chains and tends to agglomerate as stacked laminates. Accordingly, the transport of gas molecules may occur through interstitial hollow regions located between the polymer chains and the inorganic filler or through regions of lower packing density caused by the expansion of free volume by the inorganic filler [38,59,60]. With regard to the effect of the FIL [C 2 C 1 py][C 4 F 9 SO 3 ] on the separation performance of the Pebax ® 1657-based CILPMs, it is first noted that in membranes with 20 wt% FIL, R32 permeability undergoes a slight decrease compared to the pure polymer upon both feed pressures tested (−11.3 % at 1.86 bar and −7.64 % at 4.3 bar).…”

Section: R32 and R125 Permeability In Mixed Gas Conditionsmentioning

confidence: 99%

Section: R32 and R125 Permeability In Mixed Gas Conditionsmentioning

confidence: 99%

Integration of Stable Ionic Liquid-Based Nanofluids into Polymer Membranes. Part II: Gas Separation Properties toward Fluorinated Greenhouse Gases

et al. 2021

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Membrane technology can play a very influential role in the separation of the constituents of HFC refrigerant gas mixtures, which usually exhibit azeotropic or near-azeotropic behavior, with the goal of promoting the reuse of value-added compounds in the manufacture of new low-global warming potential (GWP) refrigerant mixtures that abide by the current F-gases regulations. In this context, the selective recovery of difluorometane (R32, GWP = 677) from the commercial blend R410A (GWP = 1924), an equimass mixture of R32 and pentafluoroethane (R125, GWP = 3170), is sought. To that end, this work explores for the first time the separation performance of novel mixed-matrix membranes (MMMs) functionalized with ioNanofluids (IoNFs) consisting in a stable suspension of exfoliated graphene nanoplatelets (xGnP) into a fluorinated ionic liquid (FIL), 1-ethyl-3-methylpyridinium perfluorobutanesulfonate ([C2C1py][C4F9SO3]). The results show that the presence of IoNF in the MMMs significantly enhances gas permeation, yet at the expense of slightly decreasing the selectivity of the base polymer. The best results were obtained with the MMM containing 40 wt% IoNF, which led to an improved permeability of the gas of interest (PR32 = 496 barrer) with respect to that of the neat polymer (PR32= 279 barrer) with a mixed-gas separation factor of 3.0 at the highest feed R410A pressure tested. Overall, the newly fabricated IoNF-MMMs allowed the separation of the near-azeotropic R410A mixture to recover the low-GWP R32 gas, which is of great interest for the circular economy of the refrigeration sector.

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“…Graphene nanoplatelets (GNPs) loaded in Pebax at concentrations below 1 wt% were used to prepare mixed-matrix composite membranes on PES supports [ 43 ]. Graphene was obtained via a green method (jet cavitation-assisted process) and then was N-doped before its incorporation in the polymer matrix at up to 6 wt% using a supermixer [ 44 ].…”

Section: Materials For the Analysed Mmmsmentioning

confidence: 99%

A Review of the Recent Progress in the Development of Nanocomposites Based on Poly(ether-block-amide) Copolymers as Membranes for CO2 Separation

Clarizia

Bernardo

2021

Polymers

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An inspiring challenge for membrane scientists is to exceed the current materials’ performance while keeping the intrinsic processability of the polymers. Nanocomposites, as mixed-matrix membranes, represent a practicable response to this strongly felt need, since they combine the superior properties of inorganic fillers with the easy handling of the polymers. In the global strategy of containing the greenhouse effect by pursuing a model of sustainable growth, separations involving CO2 are some of the most pressing topics due to their implications in flue gas emission and natural gas upgrading. For this purpose, Pebax copolymers are being actively studied by virtue of a macromolecular structure that comprises specific groups that are capable of interacting with CO2, facilitating its transport with respect to other gas species. Interestingly, these copolymers show a high versatility in the incorporation of nanofillers, as proved by the large number of papers describing nanocomposite membranes based on Pebax for the separation of CO2. Since the field is advancing fast, this review will focus on the most recent progress (from the last 5 years), in order to provide the most up-to-date overview in this area. The most recent approaches for developing Pebax-based mixed-matrix membranes will be discussed, evidencing the most promising filler materials and analyzing the key-factors and the main aspects that are relevant in terms of achieving the best effectiveness of these multifaceted membranes for the development of innovative devices.

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High-performance gas separation using mixed-matrix composite membranes containing graphene nanoplatelets

Cited by 9 publications

References 38 publications

Fabrication of Pebax/SAPO mixed matrix membranes for CO₂/N₂ separation

Fabrication of Pebax/SAPO mixed matrix membranes for CO₂/N₂ separation

Integration of Stable Ionic Liquid-Based Nanofluids into Polymer Membranes. Part II: Gas Separation Properties toward Fluorinated Greenhouse Gases

A Review of the Recent Progress in the Development of Nanocomposites Based on Poly(ether-block-amide) Copolymers as Membranes for CO2 Separation

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High-performance gas separation using mixed-matrix composite membranes containing graphene nanoplatelets

Cited by 9 publications

References 38 publications

Fabrication of Pebax/SAPO mixed matrix membranes for CO2/N2 separation

Fabrication of Pebax/SAPO mixed matrix membranes for CO2/N2 separation

Integration of Stable Ionic Liquid-Based Nanofluids into Polymer Membranes. Part II: Gas Separation Properties toward Fluorinated Greenhouse Gases

A Review of the Recent Progress in the Development of Nanocomposites Based on Poly(ether-block-amide) Copolymers as Membranes for CO2 Separation

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About

Fabrication of Pebax/SAPO mixed matrix membranes for CO₂/N₂ separation

Fabrication of Pebax/SAPO mixed matrix membranes for CO₂/N₂ separation