Molecular-level understanding of supported ionic liquid membranes for gas separation

Mohammadi, Maryam; Asadollahzadeh, Mehdi; Shirazian, Saeed

doi:10.1016/j.molliq.2018.04.080

Cited by 20 publications

(7 citation statements)

References 83 publications

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“…Due to the wide applications of supported ionic liquid membranes (SILMs) in gas separation and purification, especially for CO 2 capture, this topic captures the eye of many researchers at which they focus all of their effort in introducing new methods and approaches in order to increase the selectivity, permeability, and performance of the SILMs. Mohammadi, et al [ 69 ] have examined a new molecular level approach in order to analyze different types of ILs for the use in SILMs and thereby to evaluate the performance of the membrane by using quantum molecular chemical modeling and calculations. The authors have developed several relationships for the selectivity and the permeability of SILMs.…”

Section: Ionic Liquid Membranes (Ilms) In Gas Separation Processesmentioning

confidence: 99%

“…For the comparison purpose and the evaluation of the model performance, they have used the accumulative absolute relative deviation (AARD (%)). The results of their research have shown that the proposed approach has provided an accurate, extendable, pure predictive, and reproducible method for the estimations of the SILMs performance [ 69 ]. Karousos, et al [ 70 ] have investigated the N 2 and CO 2 mixed-gas permeation rates through a supported ionic liquid membrane (SILM), which was developed on a ceramic composite nanofiltration substrate with a 10 nm separation layer pore size.…”

Section: Ionic Liquid Membranes (Ilms) In Gas Separation Processesmentioning

confidence: 99%

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Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO2, CH4, N2, H2 or Mixtures of These Gases from Various Gas Streams

et al. 2020

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Heightened levels of carbon dioxide (CO2) and other greenhouse gases (GHGs) have prompted research into techniques for their capture and separation, including membrane separation, chemical looping, and cryogenic distillation. Ionic liquids, due to their negligible vapour pressure, thermal stability, and broad electrochemical stability have expanded their application in gas separations. This work provides an overview of the recent developments and applications of ionic liquid membranes (ILMs) for gas separation by focusing on the separation of carbon dioxide (CO2), methane (CH4), nitrogen (N2), hydrogen (H2), or mixtures of these gases from various gas streams. The three general types of ILMs, such as supported ionic liquid membranes (SILMs), ionic liquid polymeric membranes (ILPMs), and ionic liquid mixed-matrix membranes (ILMMMs) for the separation of various mixed gas systems, are discussed in detail. Furthermore, issues, challenges, computational studies and future perspectives for ILMs are also considered. The results of the analysis show that SILMs, ILPMs, and the ILMMs are very promising membranes that have great potential in gas separation processes. They offer a wide range of permeabilities and selectivities for CO2, CH4, N2, H2 or mixtures of these gases. In addition, a comparison was made based on the selectivity and permeability of SILMs, ILPMs, and ILMMMs for CO2/CH4 separation based on a Robeson’s upper bound curves.

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Section: Ionic Liquid Membranes (Ilms) In Gas Separation Processesmentioning

confidence: 99%

Section: Ionic Liquid Membranes (Ilms) In Gas Separation Processesmentioning

confidence: 99%

Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO2, CH4, N2, H2 or Mixtures of These Gases from Various Gas Streams

et al. 2020

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“…Some works deal with quantum chemistry of interactions between the ionic liquid and the permeating gas to provide a prediction of the permeability of the SILM. COSMO-based models seem to be the most accurate and widely applicable [ 73 , 74 , 75 , 76 ], and they were successfully used to predict gas permeability and selectivity of ionic liquid membranes. An innovative approach to the physico-chemical basics of interactions between ionic liquids and permeating gases [ 77 , 78 , 79 ] used a correlation between the transport properties of the ionic liquid (permeance, selectivity) and not only viscosity, but also the quantum chemistry value described as the “hydrogen bond acceptance ability”.…”

Section: Supported Ionic Liquid Membranesmentioning

confidence: 99%

A Review on Ionic Liquid Gas Separation Membranes

et al. 2021

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Ionic liquids have attracted the attention of the industry and research community as versatile solvents with unique properties, such as ionic conductivity, low volatility, high solubility of gases and vapors, thermal stability, and the possibility to combine anions and cations to yield an almost endless list of different structures. These features open perspectives for numerous applications, such as the reaction medium for chemical synthesis, electrolytes for batteries, solvent for gas sorption processes, and also membranes for gas separation. In the search for better-performing membrane materials and membranes for gas and vapor separation, ionic liquids have been investigated extensively in the last decade and a half. This review gives a complete overview of the main developments in the field of ionic liquid membranes since their first introduction. It covers all different materials, membrane types, their preparation, pure and mixed gas transport properties, and examples of potential gas separation applications. Special systems will also be discussed, including facilitated transport membranes and mixed matrix membranes. The main strengths and weaknesses of the different membrane types will be discussed, subdividing them into supported ionic liquid membranes (SILMs), poly(ionic liquids) or polymerized ionic liquids (PILs), polymer/ionic liquid blends (physically or chemically cross-linked ‘ion-gels’), and PIL/IL blends. Since membrane processes are advancing as an energy-efficient alternative to traditional separation processes, having shown promising results for complex new separation challenges like carbon capture as well, they may be the key to developing a more sustainable future society. In this light, this review presents the state-of-the-art of ionic liquid membranes, to analyze their potential in the gas separation processes of the future.

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“…20,21 In the latter, a reactive component of the membrane, known as a carrier, reversibly reacts with CO 2 to produce CO 2 carrier complexes that are transported through the membrane, in addition to the sorption−diffusion mechanism. 9,22 Among possible carriers, CO 2 -reactive ionic liquids (ILs) are promising materials that may be used for producing highperformance membranes. 23,24 In general terms, ILs are compounds formed by ions in the liquid state at low temperatures, below 100 °C, according to a former convention.…”

Section: Introductionmentioning

confidence: 99%

Amine/Carboxylic Acid Ionic Liquid Composite Membranes for CO₂ Separation

Alcântara

Oliveira

Lião

et al. 2021

Ind. Eng. Chem. Res.

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Alkanolamine + carboxylic acid-based ionic liquids have shown promising high CO 2 selectivities. Their addition to cellulose acetate (CA) and polyvinyl alcohol (PVA) was investigated in the present study. The N-methyl-2-hydroxyethylammonium propionate IL [m-2HEA][Pr] significantly enhances the CO 2 separation performance of PVA. Scanning electron microscopy, Fourier transform infrared spectroscopy, and nuclear magnetic resonance analyses indicate that the IL−PVA combination produced IL composite membranes with interactions being predominantly physical. Furthermore, the IL addition to CA produced porous membranes with apparent low CO 2 separation efficiency. Pure gas permeation experiments indicate that increasing IL concentration of PVA-based membranes promotes higher gas permeabilities. The membranes were prepared containing up to 60.3 wt % of [m-2HEA][Pr], which resisted pressure differentials up to 6 barg. PVA containing 45.5 wt % of IL produced the most promising results, achieving 26 barrer of CO 2 permeability and permselectivities of 122 and 213 for CO 2 /CH 4 and CO 2 /N 2 , respectively. This result was compared to promising materials from the literature and indicated the overall high CO 2 /CH 4 and CO 2 / N 2 selectivities of PVA/[m-2HEA][Pr] membranes, which overcome even the 2008 Robeson's upper boundary.

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Molecular-level understanding of supported ionic liquid membranes for gas separation

Cited by 20 publications

References 83 publications

Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO2, CH4, N2, H2 or Mixtures of These Gases from Various Gas Streams

Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO2, CH4, N2, H2 or Mixtures of These Gases from Various Gas Streams

A Review on Ionic Liquid Gas Separation Membranes

Amine/Carboxylic Acid Ionic Liquid Composite Membranes for CO₂ Separation

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Molecular-level understanding of supported ionic liquid membranes for gas separation

Cited by 20 publications

References 83 publications

Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO2, CH4, N2, H2 or Mixtures of These Gases from Various Gas Streams

Key Applications and Potential Limitations of Ionic Liquid Membranes in the Gas Separation Process of CO2, CH4, N2, H2 or Mixtures of These Gases from Various Gas Streams

A Review on Ionic Liquid Gas Separation Membranes

Amine/Carboxylic Acid Ionic Liquid Composite Membranes for CO2 Separation

Contact Info

Product

Resources

About

Amine/Carboxylic Acid Ionic Liquid Composite Membranes for CO₂ Separation