Gas separating hollow fibres from Poly(4-methyl-1-pentene): A new development

Markova, Svetlana; Pelzer, Martin; Shalygin, M. G.; Vad, Thomas; Gries, Thomas; Teplyakov, V. V.

doi:10.1016/j.seppur.2021.119534

Cited by 7 publications

(5 citation statements)

References 17 publications

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“…Membranes based on PMP can be applied in gas separation processes, where membranes based on other polymers are not stable. They can be used to separate hydrocarbons [40] or gas mixtures with VOC vapors. Moreover, PMP HFs can be used to create membrane contactors for processes with chemically aggressive absorbents.…”

Section: Discussionmentioning

confidence: 99%

“…The ends of the fabrics were placed HF direction The permeability measurements of laboratory membrane modules were carried out in the temperature range of 0 to 40 °C on a differential type set-up with gas chromatographic analysis. A detailed description of the experimental measurements of HFs can be found in [40].…”

Section: Gas Permeability Measurementsmentioning

confidence: 99%

“…The permeability coefficient through the HFs was calculated using the equation: In order to test the integrity of the HFs and to preserve their gas transport and separation characteristics after the formation of 3D structures, gas permeability was measured with a CO 2 /CH 4 mixture (50/50 vol.%), which was used previously to test initial PMP HFs [40].…”

Section: Warp Directionmentioning

confidence: 99%

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Designing 3D Membrane Modules for Gas Separation Based on Hollow Fibers from Poly(4-methyl-1-pentene)

et al. 2021

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Designing hollow fiber (HF) membrane modules occupies one of the key positions in the development of efficient membrane processes for various purposes. In developing HF membrane modules, it is very important to have a uniform HF distribution and flow mixing in the shell side to significantly improve mass transfer and efficiency. This work suggests the application of different textile 3D HF structures (braided hoses and woven tape fabrics). The 3D structures consist of melt-spun, dense HFs based on poly(4-methyl-1-pentene) (PMP). Since the textile processing of HFs can damage the wall of the fiber or close the fiber bore, the membrane properties of the obtained structures are tested with a CO2/CH4 mixture in the temperature range of 0 to 40 °C. It is shown that HFs within the textile structure keep the same transport and separation characteristics compared to initial HFs. The mechanical properties of the PMP-based HFs allow their use in typical textile processes for the production of various membrane structures, even at a larger scale. PMP-based membranes can find application in separation processes, where other polymeric membranes are not stable. For example, they can be used for the separation of hydrocarbons or gas mixtures with volatile organic compounds.

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Section: Discussionmentioning

confidence: 99%

Section: Gas Permeability Measurementsmentioning

confidence: 99%

Section: Warp Directionmentioning

confidence: 99%

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Designing 3D Membrane Modules for Gas Separation Based on Hollow Fibers from Poly(4-methyl-1-pentene)

et al. 2021

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“…It is known from the literature data that the composition of the separated mixture can affect the transfer of gases through the polymer membrane [14][15][16][17]. Therefore, an experimental study of the gas separation properties of the HF_0 sample for CO 2 /CH 4 and CO 2 /N 2 mixtures with a variation of CO 2 concentrations in a wide range was carried out.…”

Section: Investigation Of the Peculiarities Of Permeability Of Mixtur...mentioning

confidence: 99%

Preparation of Hollow Fiber Membranes Based On Poly(4-methyl-1-pentene) for Gas Separation

Dukhov

Pelzer

Markova

et al. 2021

Fibers

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New hollow fiber gas separation membranes with a non-porous selective layer based on poly(4-methyl-1-pentene) (PMP) granules have been obtained using the solution-free melt spinning process. The influence of the preparation conditions on the geometry of the obtained samples was studied. It was found that a spin head temperature of 280 °C and a specific mass throughput of 103 g mm−2 h−1 are optimal to obtain defect-free, thin-walled hollow fibers in a stable melt spinning process, using the given spinneret geometry and a winding speed of 25 m/min. The gas permeability and separation properties of new fibers were studied using CO2/N2 and CO2/CH4 mixtures, and it was found that the level of gas selectivity characteristic of homogeneous polymer films can be achieved. The features of the gas mixture components permeability below and above the PMP glass transition temperature have been experimentally studied in the range of CO2 concentrations from 10 to 90% vol. The temperature dependences of the permeability of the CO2/CH4/N2 mixture through the obtained HF based on PMP have been investigated, and the values of the apparent activation energies of the permeability have been calculated, which make it possible to predict the properties of membrane modules based on the obtained membranes in a wide temperature range.

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“…This excludes synthetic oil, which is made from long chain α-olefins [5]. PMP demonstrates excellent optical transparency, electrical insulation properties, a high melting point, low surface tension, and a high permeability towards gases and general inertness and can therefore be used as an optical material [6], gas separation membrane [7][8][9], microelectronics and microsystems material [10], hydrogen storage material [11], blood contact material for medical apparatus [12], and so on. Isotactic PMP has a melting point of ~240 • C and a glass transition temperature of ~35 • C. However, there is usually a part of the polymer that does not crystallize.…”

Section: Introductionmentioning

confidence: 99%

Polymerization of Allyltrimethylisilane and 4-Methyl-1-Pentene by Using Metallocene Catalysts

et al. 2023

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Polymers of higher olefin, obtained by Ziegler-type polymerization, have been used in some critical fields, e.g., as the membrane for extracorporeal membrane oxygenation (ECMO), which plays an important role in the treatment of patients with severe COVID-19. The polymer obtained by a single-site catalyst, e.g., metallocene catalysts, demonstrated a higher performance. The homo- and co-polymerization of allyltrimethylisilane (ATMS) and 4-methyl-1-pentene (4M1P) were conducted using syndiospecific (cat 1) and isospecific (cat 2) metallocene catalysts. Cat 1 showed low conversions and provided a polymer with a higher molecular weight, while cat 2 behaved oppositely. 13C-NMR spectra certified the stereotacticity of the resultant polymer, and the resonance of the carbon atom of CH2 (αα’) between the two tertiary carbon atoms of the ATMS and 4M1P units were observed. This could be the evidence of the formation of a true copolymer. The crystallization of the polymer was explored using a differential scanning calorimeter (DSC) and wide angle X-ray diffraction (WAXD). All homopolymers and some of the copolymers showed high melting temperatures and low melting enthalpies. The WAXD patterns of the syndiotactic polymer and isotactic homopolymer or the ATMS-rich copolymer were consistent with the reported literature, but the isotactic 4M1P-rich copolymer provided the crystal form I, which is unusual for a 4M1P polymer without any pretreatment.

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Gas separating hollow fibres from Poly(4-methyl-1-pentene): A new development

Cited by 7 publications

References 17 publications

Designing 3D Membrane Modules for Gas Separation Based on Hollow Fibers from Poly(4-methyl-1-pentene)

Designing 3D Membrane Modules for Gas Separation Based on Hollow Fibers from Poly(4-methyl-1-pentene)

Preparation of Hollow Fiber Membranes Based On Poly(4-methyl-1-pentene) for Gas Separation

Polymerization of Allyltrimethylisilane and 4-Methyl-1-Pentene by Using Metallocene Catalysts

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