scholarly journals Ultra-selective defect-free interfacially polymerized molecular sieve thin-film composite membranes for H2 purification

2018 ◽  
Vol 6 (1) ◽  
pp. 30-35 ◽  
Author(s):  
Z. Ali ◽  
F. Pacheco ◽  
E. Litwiller ◽  
Y. Wang ◽  
Y. Han ◽  
...  
Keyword(s):  
Thin Film ◽  
Molecular Sieve ◽  
State Of The Art ◽  
Composite Membranes ◽  
Polymeric Membranes ◽  
Mixed Gas ◽  
Film Composite ◽  
Thin Film Composite

Ultrathin, defect-free thin-film polyamide composite membranes developed for H2/CO2 separation exhibit mixed-gas performance far exceeding all state-of-the-art polymeric membranes.

Poly(vinylbenzyl chloride)-based poly(ionic liquids) as membranes for CO2 capture from flue gas

2017 ◽  
Vol 5 (37) ◽  
pp. 19808-19818 ◽  
Author(s):  
D. Nikolaeva ◽  
I. Azcune ◽  
E. Sheridan ◽  
Marius Sandru ◽  
A. Genua ◽  
...  
Keyword(s):  
Thin Film ◽  
Flue Gas ◽  
Composite Membranes ◽  
Gas Separations ◽  
Process Conditions ◽  
Mixed Gas ◽  
Film Composite ◽  
Gas Streams ◽  
Thin Film Composite ◽  
Poly Ionic Liquid

Poly(ionic liquid)-based thin film composite membranes capture carbon dioxide from mixed gas streams imitating flue gas separations under various process conditions.

scholarly journals Water Vapour Promotes CO2 Transport in Poly(ionic liquid)/Ionic Liquid-Based Thin-Film Composite Membranes Containing Zinc Salt for Flue Gas Treatment

2020 ◽  
Vol 10 (11) ◽  
pp. 3859 ◽  
Author(s):  
Daria Nikolaeva ◽  
Sandrine Loïs ◽  
Paul Inge Dahl ◽  
Marius Sandru ◽  
Jolanta Jaschik ◽  
...  
Keyword(s):  
Thin Film ◽  
Ionic Liquid ◽  
Separation Efficiency ◽  
Composite Membranes ◽  
Zinc Salt ◽  
Co2 Separation ◽  
Mixed Gas ◽  
Film Composite ◽  
Thin Film Composite ◽  
Poly Ionic Liquid

A poly(ionic-liquid) (PIL) matrix can be altered by incorporating additives that will disrupt the polymer chain packing, such as an ionic liquid (IL) and inorganic salts to boost their exploitation as materials for membrane production to be used in CO2 capture. Herein, potential of PIL/IL/salt blends is investigated on the example of poly(diallyldimethyl ammonium) bis(trifluoromethylsulfonyl)imide (P[DADMA][Tf2N]) with N-butyl-N-methyl pyrrolidinium bis(trifluoromethylsulfonyl)imide ([Pyrr14][Tf2N]) and zinc di-bis(trifluoromethylsulfonyl)imide (Zn[Tf2N]2). Composite material with IL and a higher amount of Zn2+ showed an increase in the equilibrium CO2 sorption capacity to 2.77 cm3 (STP)cm −3 bar−1. Prepared blends were successfully processed into thick, dense membranes and thin-film composite membranes. Their CO2 separation efficiency was determined using ideal and mixed-gas feed (vol% CO2 = 50 , dry and with 90% relative humidity). The dominant role of solubility in the transport mechanism is confirmed by combining direct gravimetric sorption measurements and indirect estimations from time-lag experiments. The maximum incorporated amount of Zn2+ salts increased equilibrium solubility selectivity by at least 50% in comparison to the parent PIL. All materials showed increased CO2 permeance values by at least 30% in dry conditions, and 60% in humidified conditions when compared to the parent PIL; the performance of pure PIL remained unchanged upon addition of water vapor to the feed stream. Mixed-gas selectivities for all materials rose by 10% in humidified conditions when compared to dry feed experiments. Our results confirm that the addition of IL improves the performance of PIL-based composites due to lower stiffness of the membrane matrix. The addition of Zn2+-based salt had a marginal effect on CO2 separation efficiency, suggesting that the cation participates in the facilitated transport of CO2.

Fouling Is the Beginning: Upcycling Biopolymer-Fouled Substrates for Fabricating High-Permeance Thin-Film Composite Polyamide Membranes

2020 ◽  
Author(s):  
Ruobin Dai ◽  
Hongyi Han ◽  
Tianlin Wang ◽  
Jiayi Li ◽  
Chuyang Y. Tang ◽  
...  
Keyword(s):  
Thin Film ◽  
High Pressure ◽  
End Of Life ◽  
Water Purification ◽  
Low Pressure ◽  
Polymeric Membranes ◽  
Membrane Recycling ◽  
Film Composite ◽  
Thin Film Composite ◽  
First Time

Commercial polymeric membranes are generally recognized to have low sustainability as membranes need to be replaced and abandoned after reaching the end of their life. At present, only techniques for downcycling end-of-life high-pressure membranes are available. For the first time, this study paves the way for upcycling fouled/end-of-life low-pressure membranes to fabricate new high-pressure membranes for water purification, forming a closed eco-loop of membrane recycling with significantly improved sustainability.

Tannin-based thin-film composite membranes integrated with nitrogen-doped graphene quantum dots for butanol dehydration through pervaporation

2021 ◽  
Vol 623 ◽  
pp. 119077
Author(s):  
Rumwald Leo G. Lecaros ◽  
Reincess E. Valbuena ◽  
Lemmuel L. Tayo ◽  
Wei-Song Hung ◽  
Chien-Chieh Hu ◽  
...  
Keyword(s):  
Thin Film ◽  
Quantum Dots ◽  
Graphene Quantum Dots ◽  
Composite Membranes ◽  
Film Composite ◽  
Nitrogen Doped ◽  
Thin Film Composite ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Multi-cycle reversible control of gas permeability in thin film composite membranes via efficient UV-induced reactions

2021 ◽  
Vol 57 (27) ◽  
pp. 3391-3394
Author(s):  
Abdalrahman U. Alrayyes ◽  
Ze-Xian Low ◽  
Huanting Wang ◽  
Kei Saito
Keyword(s):  
Thin Film ◽  
Polymer Coating ◽  
Gas Permeability ◽  
Composite Membranes ◽  
Polymer Structure ◽  
Film Composite ◽  
Thin Film Composite ◽  
Thin Polymer

This communication reports the use of light to reversibly constrict or ease the flow of oxygen through a very thin polymer coating. This is achievable by reversibly changing the polymer structure from a dense and rigid film to a loose and soft film.

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