Ionic liquid-based materials: a platform to design engineered CO2 separation membranes

2016 ◽  
Vol 45 (10) ◽  
pp. 2785-2824 ◽  
Author(s):  
Liliana C. Tomé ◽  
Isabel M. Marrucho
Keyword(s):  
Ionic Liquid ◽  
Separation Efficiency ◽  
Co2 Separation ◽  
Separation Membranes

This review provides a judicious assessment of the CO2 separation efficiency of membranes using ionic liquid-based materials and highlights breakthroughs and key challenges in this field.

Pyrrolidinium-based polymeric ionic liquid materials: New perspectives for CO2 separation membranes

2013 ◽  
Vol 428 ◽  
pp. 260-266 ◽  
Author(s):  
Liliana C. Tomé ◽  
David Mecerreyes ◽  
Carmen S.R. Freire ◽  
Luís Paulo N. Rebelo ◽  
Isabel M. Marrucho
Keyword(s):  
Ionic Liquid ◽  
Co2 Separation ◽  
Polymeric Ionic Liquid ◽  
Separation Membranes

Development of CO2 Separation Membranes with Ionic Liquid–based CO2 Carrier

MEMBRANE ◽  
2018 ◽  
Vol 43 (3) ◽  
pp. 80
Author(s):  
Eiji Kamio ◽  
Hideto Matsuyama
Keyword(s):  
Ionic Liquid ◽  
Co2 Separation ◽  
Separation Membranes

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.

CO2 Separation Membranes Consisting of Ionic Liquid/CdO Composites

2018 ◽  
Vol 18 (8) ◽  
pp. 5817-5821 ◽  
Author(s):  
Hyunyoung Kim ◽  
Hiesang Sohn ◽  
Sang Wook Kang
Keyword(s):  
Ionic Liquid ◽  
Co2 Separation ◽  
Separation Membranes

scholarly journals Enhancing Pervaporation Membrane Selectivity by Incorporating Star Macromolecules Modified with Ionic Liquid for Intensification of Lactic Acid Dehydration

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1811
Author(s):  
Valeriia Rostovtseva ◽  
Alexandra Pulyalina ◽  
Roman Dubovenko ◽  
Ilya Faykov ◽  
Kseniya Subbotina ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Lactic Acid ◽  
Polymer Matrix ◽  
Separation Factor ◽  
Membrane Structure ◽  
High Performance ◽  
Separation Efficiency ◽  
Pharmaceutical Chemical ◽  
Permeate Flux ◽  
Membrane Components

Modification of polymer matrix by hybrid fillers is a promising way to produce membranes with excellent separation efficiency due to variations in membrane structure. High-performance membranes for the pervaporation dehydration were produced by modifying poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) to facilitate lactic acid purification. Ionic liquid (IL), heteroarm star macromolecules (HSM), and their combination (IL:HSM) were employed as additives to the polymer matrix. The composition and structure of hybrid membranes were characterized by X-ray diffraction and FTIR spectroscopy. Scanning electron microscopy was used to investigate the membranes surface and cross-section morphology. It was established that the inclusion of modifiers in the polymer matrix leads to the change of membrane structure. The influence of IL:HSM was also studied via sorption experiments and pervaporation of water‒lactic acid mixtures. Lactic acid is an essential compound in many industries, including food, pharmaceutical, chemical, while the recovering and purifying account for approximately 50% of its production cost. It was found that the membranes selectively remove water from the feed. Quantum mechanical calculations determine the favorable interactions between various membrane components and the liquid mixture. With IL:HSM addition, the separation factor and performance in lactic acid dehydration were improved compared with pure polymer membrane. The best performance was found for (HSM: IL)-PPO/UPM composite membrane, where the permeate flux and the separation factor of about 0.06 kg m−2 h−1 and 749, respectively, were obtained. The research results demonstrated that ionic liquids in combination with star macromolecules for membrane modification could be a promising approach for membrane design.

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