Ultrathin gutter layer for high-performance thin-film composite membranes for CO2 separation

Yoo, Myung Jin; Kim, Kyung Hyun; Lee, Jun Hyuk; Kim, Tae Woo; Chung, Chin-Wook; Cho, Yong-Hoon; Park, Ho Bum

doi:10.1016/j.memsci.2018.09.017

Cited by 57 publications

(47 citation statements)

References 43 publications

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“…Recently, many efforts have been devoted to the development of polymeric materials with high CO 2 permeance. For example, Yoo et al reported defect-free Teflon-based membranes possessing a CO 2 permeance of~31,500 GPU (GPU: gas permeance unit, 1 GPU = 7.5 × 10 −12 m 3 (STP) m −2 s −1 Pa −1 , STP: standard temperature and pressure) with a CO 2 /N 2 selectivity of 3.3 [17]. We have also reported freestanding siloxane nanomembranes with high CO 2 permeances exceeding 40,000 GPU [18].…”

Section: Introductionmentioning

confidence: 99%

A new strategy for membrane-based direct air capture

Fujikawa

Selyanchyn²,

Kunitake³

2020

Polym J

103

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Direct CO2 capture from the air, so-called direct air capture (DAC), has become inevitable to reduce the concentration of CO2 in the atmosphere. Current DAC technologies consider only sorbent-based systems. Recently, there have been reports that show ultrahigh CO2 permeances in gas separation membranes and thus membrane separation could be a potential new technology for DAC in addition to sorbent-based CO2 capture. The simulation of chemical processes has been well established and is commonly used for the development and performance assessment of industrial chemical processes. These simulations offer a credible assessment of the feasibility of membrane-based DAC (m-DAC). In this paper, we discuss the potential of m-DAC considering the state-of-the-art performance of organic polymer membranes. The multistage membrane separation process was employed in process simulation to estimate the energy requirements for m-DAC. Based on the analysis, we propose the target membrane separation performance required for m-DAC with competitive energy expenses. Finally, we discuss the direction of future membrane development for DAC.

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Section: Introductionmentioning

confidence: 99%

A new strategy for membrane-based direct air capture

Fujikawa

Selyanchyn²,

Kunitake³

2020

Polym J

103

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“…With a thicker coating layer, the gas permeance would normally decrease. 28,29 Longer holding time in coating solution also allows more intrusion of PDMS into the pores subsequently increasing the layer thickness as suggested by Hu et al 18 It should be noted that the holding time should not be too long, exceeding the gelation time of PDMS coating solution. Interestingly, both gases uphold the same permeance at 200 s and 900 s, which could be a sign that coating is present inconsistently.…”

Section: Machine Dip-coating -Influence Of Membrane Holding Timementioning

confidence: 97%

Fabrication of polydimethylsiloxane (PDMS) dense layer on porous polyethersulfone (PES) hollow fibre membrane with varying dip coating parameters

Hassan

Ahmad

Shafie

et al. 2021

JPS

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Polydimethylsiloxane (PDMS) is commonly used as a separating layer in gas separation membrane, hydrocarbon separation process, pervaporation and as a viable gutter layer in composite membrane fabrication. A methodical dip coating technique was used to fabricate PDMS dense layer on porous polyethersulfone (PES) hollow fibre membrane. Dip coating parameters such as coating speed (5-15 mm s -1 ) and holding time (10-900 s) were varied using an automated dip coating machine. Scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy characterisation were also conducted to investigate the membrane morphology and confirmed the presence of a coating on the membrane surface. Gas permeation performance test was carried out with CO 2 and N 2 under transmembrane pressure of 1 to 3 bars after membrane coating was finalised. The test results indicated that the coating speed inflicted less influence in the overall performance with a selectivity of 0.86. Gas permeance also exceeded 20,000 GPU mark at a lower speed, suggesting that a single coating at this speed range could not fully coat the porous PES fibres. Nevertheless, reduction of permeance with increasing speed indicates an improvement in the PDMS layer thickness. On the other hand, holding time in the coating solution showed a slight effect on membrane performance compared to the coating speed. However, the membrane exhibits drop in permeance reaching below 1,000 GPU at high holding time, suggesting a more complete coverage of the support with the PDMS layer. Hypothetically, it is caused by the increased viscosity during the PDMS crosslinking reaction as time passed, allowing more PDMS solution to be retained on the PES fibre's surface.

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“…4,6 This discrepancy is suggested to be due to various non-equilibrium sorption-desorption effects dominating at the polymer interface, as well as morphological changes in the crosslinked polymer network. 5,[7][8] Furthermore, the pore infiltration and the geometric restriction in a TFC membrane assembly resulting from the limited pore accessibility of porous substrates further exacerbate such thicknessdependent permeability. [9][10][11] Consequently, these two issues handicap the development of high-performance TFC membranes.…”

Section: Introductionmentioning

confidence: 99%

“…In an effort to address these issues associated with gutter layers, the Park group reported an alternative Teflon (AF2400) based gutter layer, which displayed excellent CO 2 permeance (> 30000 GPU). 8 More recently, our group has developed a gutter layer composed of microporous metal-organic framework (MOF) with similar gas permeance. [12][13] However, the expensive Teflon and metal-organic framework (MOF) based gutter layers have relatively lower flexibility and processability.…”

Section: Introductionmentioning

confidence: 99%

Physical Aging Investigations of a Spirobisindane-Locked Polymer of Intrinsic Microporosity

Liu

Lü

Nothling

et al. 2020

ACS Materials Lett.

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Thin film composite (TFC) polymeric membranes have attracted increasing interest to meet the demands of industrial gas separation. However, the development of high performance TFC membranes within their current configuration faces two key challenges: (i) the thickness-dependent gas permeability of polymeric materials (mainly polydimethylsiloxane (PDMS)) and (ii) the geometric restriction effect due to the limited pore accessibility of the underlying porous substrate. Here we demonstrate that the incorporation of trace (~1.8 wt%) amounts of amorphous metal-organic framework (MOF) nanosheets into the gutter layer of TFC assemblies can simultaneously address these two limitations by the creation of rapid, transmembrane gas diffusion pathways. Leveraging this strategy, we successfully fabricate a novel TFC membrane, consisting of a PDMS&MOF gutter and an ultrathin (~54 nm) poly(ethylene glycol) top selective layer via surface-initiated atom transfer radical polymerization (ATRP). The complete TFC membrane exhibits excellent processability and remarkable CO 2 /N 2 separation permeance (1,990 GPU with a CO 2 /N 2 ideal selectivity of 39). This study reveals a strategy for the design and fabrication of a new TFC membrane system with unprecedented gas separation performance. ASSOCIATED CONTENT Supporting InformationThe Supporting Information is available free of charge on the ACS Publications website.

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Ultrathin gutter layer for high-performance thin-film composite membranes for CO2 separation

Cited by 57 publications

References 43 publications

A new strategy for membrane-based direct air capture

A new strategy for membrane-based direct air capture

Fabrication of polydimethylsiloxane (PDMS) dense layer on porous polyethersulfone (PES) hollow fibre membrane with varying dip coating parameters

Physical Aging Investigations of a Spirobisindane-Locked Polymer of Intrinsic Microporosity

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