scholarly journals CO2/N2 Separation by Supported Ionic Liquid Membranes Based on Tubular Ceramic Support Impregnated with Selected Ionic Liquid

2020 ◽  
Vol 39 (1) ◽  
pp. 101
Author(s):  
Zenon Ziobrowski ◽  
Adam Rotkegel
Keyword(s):  
Ionic Liquid ◽  
Separation Efficiency ◽  
Separation Performance ◽  
Liquid Membranes ◽  
Supported Ionic Liquid ◽  
Ceramic Support ◽  
Microfiltration Membranes ◽  
Separation Of Co2 ◽  
Supported Ionic Liquid Membranes ◽  
Very High

The separation of CO2/N2  by supported ionic liquid membranes (SILMs) is presented. SILMs have been developed by impregnation of the ceramic support nanopores of  commercial PDMS (polidimethylosiloxane) membranes (made by Pervatech BV) and commercial microfiltration membranes (made by Inopor) with 1-ethyl-3-methylimidazolium acetate ([Emim][Ac]). Comparison of separation efficiency of SILMs prepared on the same ceramic support shows that SILMs based on PDMS membranes show good stability and very high CO2/N2 selectivity. Yhe obtained results present an inexpensive alternative in selective CO2/N2 separation by SILMs, especially when the choice of selectivity is the first priority. The comparison with Robeson upper bond correlation and literature data shows that applying the ionic liquid and appropriate impregnating method to the PDMS membranes results in significant improvement of separation performance.

scholarly journals Acidic Gases Separation from Gas Mixtures on the Supported Ionic Liquid Membranes Providing the Facilitated and Solution-Diffusion Transport Mechanisms

Membranes ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 9 ◽  
Author(s):  
Alsu Akhmetshina ◽  
Nail Yanbikov ◽  
Artem Atlaskin ◽  
Maxim Trubyanov ◽  
Amal Mechergui ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Diffusion Mechanism ◽  
Operating Conditions ◽  
Separation Performance ◽  
Liquid Membranes ◽  
Factors Affecting ◽  
Acidic Gases ◽  
Supported Ionic Liquid ◽  
Ideal Selectivity ◽  
Supported Ionic Liquid Membranes

Nowadays, the imidazolium-based ionic liquids containing acetate counter-ions are attracting much attention as both highly selective absorbents of the acidic gases and CO2 carriers in the supported ionic liquid membranes. In this regard, the investigation of the gas transport properties of such membranes may be appropriate for better understanding of various factors affecting the separation performance and the selection of the optimal operating conditions. In this work, we have tested CH4, CO2 and H2S permeability across the supported ionic liquid membranes impregnated by 1-butyl-3-methylimidazolium acetate (bmim[OAc]) with the following determination of the ideal selectivity in order to compare the facilitated transport membrane performance with the supported ionic liquid membrane (SILM) that provides solution-diffusion mechanism, namely, containing 1-butyl-3-methylimidazolium tetrafluoroborate (bmim[BF4]). Both SILMs have showed modest individual gases permeability and ideal selectivity of CO2/CH4 and H2S/CH4 separation that achieves values up to 15 and 32, respectively. The effect of the feed gas mixture composition on the permeability of acidic gases and permeselectivity of the gas pair was investigated. It turned out that the permeation behavior for the bmim[OAc]-based SILM toward the binary CO2/CH4, H2S/CH4 and ternary CO2/H2S/CH4 mixtures was featured with high acidic gases selectivity due to the relatively low methane penetration through the liquid phase saturated by acidic gases.

Improvement in the separation efficiency of transesterification reaction compounds by the use of supported ionic liquid membranes based on the dicyanamide anion

Desalination ◽  
2009 ◽  
Vol 244 (1-3) ◽  
pp. 122-129 ◽  
Author(s):  
Francisco J. Hernández-Fernández ◽  
Antonia P. de los Ríos ◽  
Francisca Tomás-Alonso ◽  
Demetrio Gómez ◽  
Gloria Víllora
Keyword(s):  
Ionic Liquid ◽  
Separation Efficiency ◽  
Transesterification Reaction ◽  
Liquid Membranes ◽  
Supported Ionic Liquid ◽  
Supported Ionic Liquid Membranes

scholarly journals Investigating the Proton and Ion Transfer Properties of Supported Ionic Liquid Membranes Prepared for Bioelectrochemical Applications Using Hydrophobic Imidazolium-Type Ionic Liquids

Membranes ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 359
Author(s):  
László Koók ◽  
Piroska Lajtai-Szabó ◽  
Péter Bakonyi ◽  
Katalin Bélafi-Bakó ◽  
Nándor Nemestóthy
Keyword(s):  
Mass Transfer ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Microbial Fuel Cells ◽  
Transport Numbers ◽  
Liquid Membranes ◽  
Ion Transfer ◽  
Supported Ionic Liquid ◽  
Supported Ionic Liquid Membranes ◽  
Transfer Properties

Hydrophobic ionic liquids (IL) may offer a special electrolyte in the form of supported ionic liquid membranes (SILM) for microbial fuel cells (MFC) due to their advantageous mass transfer characteristics. In this work, the proton and ion transfer properties of SILMs made with IL containing imidazolium cation and [PF6]− and [NTf2]− anions were studied and compared to Nafion. It resulted that both ILs show better proton mass transfer and diffusion coefficient than Nafion. The data implied the presence of water microclusters permeating through [hmim][PF6]-SILM to assist the proton transfer. This mechanism could not be assumed in the case of [NTf2]− containing IL. Ion transport numbers of K+, Na+, and H+ showed that the IL with [PF6]− anion could be beneficial in terms of reducing ion transfer losses in MFCs. Moreover, the conductivity of [bmim][PF6]-SILM at low electrolyte concentration (such as in MFCs) was comparable to Nafion.

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