Effect of the preparation conditions on the properties of polyetherimide hollow fibre membranes for gas separation

Válek, Robert; Malý, David; Peter, Jakub; Gruart, Marion

doi:10.5004/dwt.2017.20747

Cited by 8 publications

(6 citation statements)

References 20 publications

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“…Thus, Chou and Yang [16], using the example of cellulose acetate hollow fibers, found that the molecular chains become more oriented with an increase in the draw ratio, leading in the formation of hollow fiber membranes with smaller diameters and greater mechanical strength. Similarly, in [17], an increase in DR values led to a decrease in the geometric parameters of hollow fiber membranes made of polyetherimide.…”

Section: Determination Of the Draw Ratiomentioning

confidence: 90%

Effect of Draw Ratio on the Morphology of Polysulfone Hollow Fiber Membranes

Matveev

Kutuzov

Vasilevsky

2020

Membr. Membr. Technol.

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The draw ratio (DR) is an important parameter in the process of spinning hollow fiber membranes, by which their separation and performance characteristics can be controlled over a wide range of values. For the first time, a method for determining the DR using a roller movable in the vertical direction is described, which makes it possible to establish the ratio of the dope extrusion linear flow rate to the take-up speed. In the course of the work, polysulfone hollow-fiber membranes were obtained at various DR values. The influence of the draw ratio on the morphology and geometric and gas transport properties of the resulting polysulfone hollow fiber membranes has been examined.

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Section: Determination Of the Draw Ratiomentioning

confidence: 90%

Effect of Draw Ratio on the Morphology of Polysulfone Hollow Fiber Membranes

Matveev

Kutuzov

Vasilevsky

2020

Membr. Membr. Technol.

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“…Hollow‐fibers and membrane module was prepared utilizing the infrastructure of the MemBrain company in Czech Republic. Hollow fibers were prepared by phase inversion process method 24,25 . A solution containing 27 wt% PEI, 12 wt% EtOH and 61% by weight of NMP was used to make hollow‐fiber membranes.…”

Section: Methodsmentioning

confidence: 99%

“…Hollow fibers were prepared by phase inversion process method. 24,25 A solution containing 27 wt% PEI, 12 wt% EtOH and 61% by weight of NMP was used to make hollow-fiber membranes. This solution was spun using a spinning line at 50 C into a precipitation bath filled with RO water with temperature of 20 C. During the production of membranes the polymer solution flow was 2.7 mL/min, bore liquid flow was 3.0 mL/ min, distance of spinning nozzle from the water surface (air gap) was 9 cm and the towing speed of precipitated fiber was 17 m/min.…”

Section: Fabrication and Characteristics Of The Pei Membrane Modulementioning

confidence: 99%

Feasibility study of polyetherimide membrane for enrichment of carbon dioxide from synthetic biohydrogen mixture and subsequent utilization scenario using microalgae

et al. 2020

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In this work, the potential of utilizing a polyetherimide (PEI) hollow-fiber membrane to separate synthetic biohydrogen mixture (H 2 /CO 2 ) was studied.From the gas separation experiments, where the effects of feed to permeate pressure ratio (P feed /P permeate ) and stage-cut as key factors were evaluated, it was found that the PEI membrane had the capacity to purify either H 2 or CO 2 .It turned out that different separation settings should be chosen in accordance with the actual technological purpose, defined either as the enrichment of H 2 or CO 2 . The highest H 2 concentration (66.4 vol%) in the permeate was achieved at P feed /P permeate of 4.62 and stage-cut of 0.47, while the peak CO 2 concentration (79.2 vol%) in the retentate was obtained by applying P feed /P permeate of 4.55 and stage-cut of 0.65. The assessment and discussion of results indicated the possible utilization of the CO 2 -rich fraction (produced by the PEI membrane) for the biological sequestration using microalgae. To our knowledge, PEI membranes have not yet been tested in such a concept and thus, the results and experiences can mean a new contribution to the literature.

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“…Although this setting minimizes gas consumption and saves time, the correct mass balance on each module should be calculated. More information with regard to this can be found in [3]. The permeance P i for CO 2 and H 2 as well as the CO 2 /H 2 mixed gas selectivity α * i/j were evaluated from measured data.…”

Section: Development Of Hf Membrane Modulesmentioning

confidence: 99%

Membrane Unit for Integrated Gas Separation – Membrane Bioreactor (GS-MBR) System

Pientka¹,

Peter²,

Válek³

2022

Hung. J. Ind. Chem.

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One of the research directions of renewable energy sources is the production of biohydrogen from the dark fermentation of organic matter. During this fermentation process, since hydrogen is produced along with a complex mixture of other gases and vapors, hydrogen gas requires further purification. One relatively easy solution to this problem might be the utilization of gas separation membrane modules given their low energy consumption, simple operation and ease of upscaling. In this work, hollow fiber (HF) membranes based on polyetherimide (PEI) were developed and tested. HF membranes were spun from a polymer solution of PEI using the wet phase inversion process into a water bath using a pilot-scale spinning device. Gas transport measurements showed that membranes exhibited permeances of between 9.3 and 19.2 GPU with CO2/H2 selectivities within the range of 3.3 - 5.6. Morphology studies showed regular shapes resembling hollow fibers with outer diameters within the range of 250-320 microns, depending on various parameters of the spinning process. The best performing membranes were selected and a morphological analysis carried out. Selected fibers were incorporated into two types of membrane modules. One type was a laboratory-scale membrane mini-module used for preliminary tests, while the other membrane module was designed for the treatment of larger amounts of biohydrogen. Two types of laboratory-scale membrane separation units were constructed. For laboratory use, the low-pressure unit proved more accurate regulation to match the fermenters performance with the separation unit in comparison with the high-pressure one.

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Effect of the preparation conditions on the properties of polyetherimide hollow fibre membranes for gas separation

Cited by 8 publications

References 20 publications

Effect of Draw Ratio on the Morphology of Polysulfone Hollow Fiber Membranes

Effect of Draw Ratio on the Morphology of Polysulfone Hollow Fiber Membranes

Feasibility study of polyetherimide membrane for enrichment of carbon dioxide from synthetic biohydrogen mixture and subsequent utilization scenario using microalgae

Membrane Unit for Integrated Gas Separation – Membrane Bioreactor (GS-MBR) System

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