Theoretical and experimental investigation of CO2 separation from CH4 and N2 through supported ionic liquid membranes

Shamair, Zufishan; Habib, Nitasha; Gilani, Mazhar Amjad; Khan, Asim Laeeq

doi:10.1016/j.apenergy.2020.115016

Cited by 59 publications

(17 citation statements)

References 53 publications

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“…The prepared SILM results have shown that there is a high selectivity of 37.92 and 40.29 for CO 2 /CH 4 and CO 2 /N 2 , respectively. These results strengthen the DFT calculation and indicate that there are up-and-coming applications for SILM in gas separation [ 43 ]. Sohaib, et al [ 44 ] have mentioned in their research study that coupled absorption/desorption in combination with ILs, can be considered very useful for continuous post-combustion carbon capture [ 44 ].…”

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

confidence: 70%

“…The results obtained from their study have shown that the proposed system is capable of removing CO 2 from anaesthetic gas circuits [ 42 ]. Shamair, et al [ 43 ] have successfully investigated the performance of a recently synthesized RTIL in SILM, theoretically, and experimentally. In their study, benzimidazolium-1-acetate was used to synthesize SILM over a polyimide support.…”

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

confidence: 99%

“…Consequently, their modified membrane contactor system had shown great potential for further usage in the industrial process of CO 2 capture [ 67 ]. As time passes, Shamair, Habib, Gilani and Khan [ 43 ] has examined the performance of a newly synthesized RTIL in SILM, experimentally, and theoretically. Benzimidazolium-1-acetate was used in his study to synthesize SILM over polyimide support.…”

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

confidence: 99%

“…This relation can be attributed to the increased diffusion rate of CO 2 in the membrane. It can be concluded from the Shamair, Habib, Gilani and Khan [ 43 ] study that the increased diffusion rate can be as a result of the decreased viscosity of the RTIL as the temperature is increased. This decrease in viscosity leads to a higher molar free volume for the gas to pass through the membrane matrix.…”

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

confidence: 99%

“…Also, the leap down of selectivity can be linked to better CH 4 permeability, because of the increased free volume. Thus, based on the study’s Arrhenius plot, as the temperature increases, the permeability of CO 2 increases, and the selectivity of CO 2 /CH 4 decreases [ 43 ]. Schott, et al [ 68 ] have tested five new RTILs as a supported ionic liquid membrane (SILMs) for CO 2 /N 2 separation capability.…”

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 Processessupporting

confidence: 70%

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

confidence: 99%

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

confidence: 99%

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

confidence: 99%

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

confidence: 99%

See 3 more Smart Citations

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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Self‐Assembled Facilitated Transport Membranes with Tunable Carrier Distribution for Ethylene/Ethane Separation

Dou

Wang

et al. 2021

Adv Funct Materials

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Facilitated transport membranes (FTMs) are a forward-looking technology and have triggered revolutions in many energy-intensive gas separations. However, the precise manipulation of carrier distribution within FTMs, as well as the visualization of membrane structure at the nanoscale, has never been reported. Herein, FTMs are constructed with tunable carrier distribution by a facile ion/molecule self-assembly of protic ionic liquid crystal salts (PILSs), polyol, and ethylene-transport carrier for highly efficient sub-angstrom scale ethylene/ ethane (0.416nm/0.443nm) separation. The elaborate regulation of non-covalent interactions by optimizing the ion/molecule compositions within membrane confers the bi-continuous nanostructure of FTMs, resulting in the formation of successive carrier wires and enormous 3D interconnected ethylene transport pathways, which is verified and visualized by molecular dynamics simulations and synchronous small-and wide-angle X-ray scattering (SWAXS). The as-designed FTMs manifest simultaneously super-high selectivity, excellent ethylene permeance, and robust long-term stability, which exceeds previously reported ethylene/ethane separation membranes. This study clearly draws the first picture of carrier distribution within FTMs, and deep insight into membrane structure will shed light on the design of high-performance separation membranes for energy-intensive gas separations.

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Selective CO₂ separation through physicochemical absorption by triazole‐functionalized ionic liquid binary absorbents

Sun,

Zeng,

et al. 2024

AIChE Journal

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The selective separation of CO2 from CH4‐containing gases is crucial to produce clean energy gases. In this study, triazole anion‐functionalized ionic liquids (TAFILs) were designed by combining low molecular weight cations with triazole anions containing N electronegative site and further mixed with physical solvents to form physicochemical absorbents. The results indicated that [Cho][Triz]/TMS (80 wt%/20 wt%) not only absorbs 0.125 g CO2/g absorbent equal to that of 30 wt% MEA solution at 40°C and 1 bar, but also has low enthalpy of −35.76 kJ/mol less than half of 30 wt% MEA solution. Simultaneously, a super high CO2/CH4 selectivity of 191.0, higher than most of the reported absorbents, is obtained for [Cho][Triz]/TMS solvents. Such great performance of CO2 separation was attributed to relatively weak chemical and physical interaction between CO2 and TAFIL binary absorbents. This study may provide novel promising ionic liquid absorbents for CO2 capture applications from clean energy gases.

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Theoretical and experimental investigation of CO2 separation from CH4 and N2 through supported ionic liquid membranes

Cited by 59 publications

References 53 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

Self‐Assembled Facilitated Transport Membranes with Tunable Carrier Distribution for Ethylene/Ethane Separation

Selective CO₂ separation through physicochemical absorption by triazole‐functionalized ionic liquid binary absorbents

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Theoretical and experimental investigation of CO2 separation from CH4 and N2 through supported ionic liquid membranes

Cited by 59 publications

References 53 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

Self‐Assembled Facilitated Transport Membranes with Tunable Carrier Distribution for Ethylene/Ethane Separation

Selective CO2 separation through physicochemical absorption by triazole‐functionalized ionic liquid binary absorbents

Contact Info

Product

Resources

About

Selective CO₂ separation through physicochemical absorption by triazole‐functionalized ionic liquid binary absorbents