Graphene oxide membranes with high permeability and selectivity for dehumidification of air

Shin, Yongsoon; Liu, Wei; Schwenzer, Birgit; Manandhar, Sandeep; Chase-Woods, Dylan; Engelhard, Mark H.; Devanathan, Ram; Fifield, Leonard S.; Bennett, Wendy D.; Ginovska, Bojana; Gotthold, D.

doi:10.1016/j.carbon.2016.05.023

Cited by 57 publications

(28 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The unique microstructure of GO is represented by a laminar assembly of stacked 2D nanosheets covered with hydrophilic oxygen-containing groups. Under standard conditions, graphene oxide shows barrier properties towards most of gases but exhibits high selectivity for water vapor, which makes it a perfect candidate for gas dehumidification processes [2][3][4]. Gases and vapors can migrate through graphene oxide structure by interlayer diffusion, cross-layer channels and defects in GO nanosheets [5].…”

Section: Introductionmentioning

confidence: 99%

“…To date, a lack of attention is payed to the separation properties and stability of GO under elevated pressure. The reported results on water vapor-gas separation were obtained without absolute pressure difference between feed and permeate side [2,3]. Only few studies on permeation of liquid water across GO membranes at elevated pressure in nanofiltration processes have been published [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nanoscale architecture of graphene oxide membranes for improving dehumidification performance

Chernova¹,

Петухов²,

Kapitanova³

et al. 2018

Nanosystems: Phys. Chem. Math.

View full text Add to dashboard Cite

Thin composite graphene oxide (GO) membranes prepared from the mixture of GO nanoflakes and nanoribbons are proposed to enhance membrane stability at elevated pressure gradients. It is shown that addition of 5-15 % of GO nanoribbons to medium flake graphene oxide during deposition allows up to a 60 % increase in the porosity of GO membranes. The membranes illustrate strong barrier properties to permanent gases with a permeance below 0.01 m 3 /(m 2 •bar•h), while revealing high permeance to water vapor over 50 m 3 /(m 2 •bar•h). This results in H 2 O/N 2 selectivity up to 12500 at water vapor fluxes over 1 m 3 /(m 2 •h) at relative humidity of feed stream of 90 %. Despite ∼ 10 % loss of membrane performance with addition of nanoribbons, the membranes reveal an improved stability to pressure gradients. Irreversible permeance loss of composite membranes does not exceed 10 % as compared to ∼ 35 % performance loss for pure medium flake graphene oxide (MFGO) after long term exposure to 0.1 MPa pressure difference. An improved stability is invoked for the prevention of the irreversible conglomeration of GO flakes and appearance of permanent channels for water transport along the edges of nanoribbons.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanoscale architecture of graphene oxide membranes for improving dehumidification performance

Chernova¹,

Петухов²,

Kapitanova³

et al. 2018

Nanosystems: Phys. Chem. Math.

View full text Add to dashboard Cite

show abstract

“…This increase in tortuosity affects more the diffusion of larger molecules than smaller ones. Especially water molecules can permeate fast through GO nanosheets due to hydrophilic GO pathways [16,17].…”

Section: Introductionmentioning

confidence: 99%

Pebax®1657/Graphene oxide composite membranes for improved water vapor separation

Akhtar

Kumar

Peinemann

2017

Journal of Membrane Science

111

View full text Add to dashboard Cite

In this study composite mixed matrix membranes containing hydrophilic microphaseseparated block copolymer (Pebax ® 1657) and graphene oxide nanosheets were prepared using a dip coating method. Water vapor and N 2 gas permeation were measured as a function of different parameters: (i) layer thickness, (ii) content of graphene oxide (GO), and (iii) content of reduced GO. Surprisingly, a concentration of only 2 wt% of GO nanosheets well dispersed in the Pebax layer boosted the selectivity 8 times by decreasing the water vapor permeance by only 12 % whereas N 2 gas permeance decreased by 70 %. Using reduced GO instead, the water vapor permeance declined by up to 16% with no influence on the N 2 gas permeance. We correlated the permeation properties of the mixed matrix membranes with different models and found, that both the modified Nielsen model and the Cussler model give good correlation with experimental findings.

show abstract

“…4 Substantial efforts to develop suitable highly permselective polymeric [17][18][19][20][21][22], inorganic [14,19,23], liquid [24,25] and mixed matrix [26,27] membranes have been explored. However, precisely how membrane permeance and selectivity affect the COP of VMD remains to be elucidated,…”

Section: Accepted Manuscriptmentioning

confidence: 99%

A thermodynamic perspective to study energy performance of vacuum-based membrane dehumidification

Bui

Kumja

Gordon

et al. 2017

Energy

View full text Add to dashboard Cite

In humid environments, decoupling the latent and sensible cooling loads-dehumidifying-can significantly improve chiller efficiency. Here, a basic limit for dehumidification efficiency is established from fundamental thermodynamics. This is followed by the derivation of how this limit is modified when the pragmatic constraint of a finite flux must be accommodated. These limits allow one to identify promising system modifications, and to quantify their impact. The focus is on vacuum-based membrane dehumidification. New high-efficiency configurations are formulated, most notably, by coupling pumping with condensation. More than an order-of-magnitude improvement in efficiency is achievable. It is contingent on water vapor exiting at its saturation pressure rather than at ambient pressure. Sensitivity studies to recovery ratio, temperature, relative humidity and membrane selectivity are also presented.

show abstract

Graphene oxide membranes with high permeability and selectivity for dehumidification of air

Cited by 57 publications

References 27 publications

Nanoscale architecture of graphene oxide membranes for improving dehumidification performance

Nanoscale architecture of graphene oxide membranes for improving dehumidification performance

Pebax®1657/Graphene oxide composite membranes for improved water vapor separation

A thermodynamic perspective to study energy performance of vacuum-based membrane dehumidification

Contact Info

Product

Resources

About