Preferential CO2 Separation Over Nitrogen by a Free-standing and Nanometer-thick Membrane

Fujikawa, Shigenori; Ariyoshi, Miho; Shigyo, Eiko; Fukakusa, Chihoko; Selyanchyn, Roman; Kunitake, Toyoki

doi:10.1016/j.egypro.2017.03.1907

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…Thin film composite (TFC) membranes were fabricated according to previous reports [8,17,18] using the procedure schematically depicted in Figure 2. At first glass substrates were washed in water and ethanol, dried by air blowing, and treated with oxygen plasma for 3 min (FA-1, SAMCO, Kyoto, Japan.…”

Section: Methodsmentioning

confidence: 99%

Thickness Effect on CO2/N2 Separation in Double Layer Pebax-1657®/PDMS Membranes

2018

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The effect of thickness in multilayer thin-film composite membranes on gas permeation has received little attention to date, and the gas permeances of the organic polymer membranes are believed to increase by membrane thinning. Moreover, the performance of defect-free layers with known gas permeability can be effectively described using the classical resistance in series models to predict both permeance and selectivity of the composite membrane. In this work, we have investigated the Pebax®-MH1657/PDMS double layer membrane as a selective/gutter layer combination that has the potential to achieve sufficient CO2/N2 selectivity and permeance for efficient CO2 and N2 separation. CO2 and N2 transport through membranes with different thicknesses of two layers has been investigated both experimentally and with the utilization of resistance in series models. Model prediction for permeance/selectivity corresponded perfectly with experimental data for the thicker membranes. Surprisingly, a significant decrease from model predictions was observed when the thickness of the polydimethylsiloxane (PDMS) (gutter layer) became relatively small (below 2 µm thickness). Material properties changed at low thicknesses—surface treatments and influence of porous support are discussed as possible reasons for observed deviations.

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Section: Methodsmentioning

confidence: 99%

Thickness Effect on CO2/N2 Separation in Double Layer Pebax-1657®/PDMS Membranes

2018

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“…In this case, epoxy groups reacted with the primary or secondary amines in PEI and formed ethanol-amine structures that could act as CO 2 affinity sites. As-prepared nanomembranes showed moderate CO 2 selectivity over N 2 under humid conditions [ 61 ]. Although more sophisticated membrane material designs are necessary, this result indicates that the as-prepared nanomembranes did not possess serious defects that led to simple gas leakage.…”

Section: Nanomembranes For Co 2 Capturementioning

confidence: 99%

“… (a) SEM (left) and photography (right) of robust PEI/PCGF nanomembranes with a thickness of ~40 nm on a porous polycarbonate support and in freestanding condition respectively. Reprinted with permission from Fujikawa et al [ 61 ]. (b) Photograph of an ant walking on a PDMS membrane with a thickness of ca.…”

Section: Nanomembranes For Co 2 Capturementioning

confidence: 99%

Membrane thinning for efficient CO₂ capture

Selyanchyn

Fujikawa

2017

Science and Technology of Advanced Materials

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Enhancing the fluxes in gas separation membranes is required for utilizing the membranes on a mass scale for CO2 capture. Membrane thinning is one of the most promising approaches to achieve high fluxes. In addition, sophisticated molecular transport across membranes can boost gas separation performance. In this review, we attempt to summarize the current state of CO2 separation membranes, especially from the viewpoint of thinning the selective layers and the membrane itself. The gas permeation behavior of membranes with ultimate thicknesses and their future directions are discussed.

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Membranes for Carbon Dioxide Separation on a Small Scale: State of Art, Challenges and Applications

Tripathi

Bej

Das

2021

Journal of Environmental Chemical Engineering

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Preferential CO2 Separation Over Nitrogen by a Free-standing and Nanometer-thick Membrane

Cited by 4 publications

References 5 publications

Thickness Effect on CO2/N2 Separation in Double Layer Pebax-1657®/PDMS Membranes

Thickness Effect on CO2/N2 Separation in Double Layer Pebax-1657®/PDMS Membranes

Membrane thinning for efficient CO₂ capture

Membranes for Carbon Dioxide Separation on a Small Scale: State of Art, Challenges and Applications

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Preferential CO2 Separation Over Nitrogen by a Free-standing and Nanometer-thick Membrane

Cited by 4 publications

References 5 publications

Thickness Effect on CO2/N2 Separation in Double Layer Pebax-1657®/PDMS Membranes

Thickness Effect on CO2/N2 Separation in Double Layer Pebax-1657®/PDMS Membranes

Membrane thinning for efficient CO2 capture

Membranes for Carbon Dioxide Separation on a Small Scale: State of Art, Challenges and Applications

Contact Info

Product

Resources

About

Membrane thinning for efficient CO₂ capture