Ionic liquids: Promising compounds for sustainable chemical processes and applications

Nasirpour, Niloofar; Mohammadpourfard, Mousa; Heris, Saeed Zeinali

doi:10.1016/j.cherd.2020.06.006

Cited by 166 publications

(59 citation statements)

References 347 publications

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“…The change in the melting points of the ionic liquids is linked to the symmetry or cation size, as the chain length changes the melting point changes. Nasirpour, et al [ 54 ] researched the relationship between chain length and the melting point by examining the Ionic liquids melting point versus the length of the alkyl chain for [C n mim][PF 6 ] and trihexyl-alkylphosphonium hexafluorophosphate [P666n][PF 6 ]). The results of their study have shown that the alkylmethylimidazolium [PF 6 ] ionic liquids have shown a decrease in the melting temperature as the alkyl chain length increase.…”

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%

“…Shorter alkyl chains with n < 6 have higher melting points since they produce symmetrical Ionic Liquids with better ion cohesion. Also, longer alkyl chains with n > 8 have higher melting points since their cations are more hydrophobic and form Van der Waals forces [ 52 , 54 ].…”

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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“…However, in the past 2 years, emphasis has moved from first-generation to second-and third-generation ILs, which are more compatible with enzymes [1,2] and can be derived from environmentally friendly and relatively inexpensive renewable sources [3,4]. A Scopus search of the literature from 2018 to 2020 generated many keywords related to ILs and enzymes, such as enzyme activity, enzyme immobilization, thermostability, biomass, pretreatment, and biofuel production.…”

Section: Introductionmentioning

confidence: 99%

Facilitating enzymatic reactions by using ionic liquids: A mini review

Elgharbawy

Moniruzzaman

Goto

2021

Current Opinion in Green and Sustainable Chemistry

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Over the past two decades, ionic liquids (ILs) have been widely used for enzymatic conversions of substratesespecially substrates that are insoluble in common organic solvents and waterresulting in high conversion rates, high selectivity, and improved enzyme stability, wherein the ILs are recoverable and recyclable. Compared with performance in first-generation ILs, researchers recently considerably improved the technological utility of enzymes in second-and third-generation ILs composed of enzyme-benign cations and anions. Use of upgraded ILs with enzymes offers further improved activity and stability compared with research studies in the past decade, rendering IL-assisted biocatalytic processes more environmentally and economically attractive. This short review briefly presents recent developments of enzymatic reactions in ILs. The review covers approaches for and modifications of enzymes and ILs within the past 2 years for improved enzymes performance in ILs.

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“…So, it is called “green” chemical solvent to replace the traditional volatile toxic solvent [ 8 , 9 ]. Therefore, ionic liquids are considered as one of the most promising green solvents and catalysts in the 21st century and have been applied in many fields such as biocatalysis, separation technology, and electrochemistry [ 10 ]. Furthermore, some polymerized RTILs can work as the final material for passive optical components.…”

Section: Introductionmentioning

confidence: 99%

High Figure of Merit Optical Buffering in Coupled-Slot Slab Photonic Crystal Waveguide with Ionic Liquid

2020

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Slow light with adequate low group velocity and wide bandwidth with a flat band of the zero-dispersion area were investigated. High buffering capabilities were obtained in a silicon-polymer coupled-slot slab photonic crystal waveguide (SP-CS-SPCW) with infiltrating slots by ionic liquid. A figure of merit (FoM) around 0.663 with the lowest physical bit length Lbit of 4.6748 µm for each stored bit in the optical communication waveband was gained by appropriately modifying the square air slot length. Posteriorly, by filling the slots with ionic liquid, the Lbit was enhanced to be 4.2817 μm with the highest FoM of 0.72402 in wider transmission bandwidth and ultra-high bit rate in terabit range, which may become useful for the future 6G mobile communication network. Ionic liquids have had a noticeable effect in altering the optical properties of photonic crystals. A polymer was used for the future incorporation of an electro-optic effect in buffers to realize the dynamic controlling of optical properties. Ionic liquids enhanced the transmission rate through optical materials. Additionally, the delay time in the ns-range was achieved, providing longer delay and ultra-low group velocity, which is important for light-matter interaction in light amplifiers and nonlinear devices.

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Ionic liquids: Promising compounds for sustainable chemical processes and applications

Cited by 166 publications

References 347 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

Facilitating enzymatic reactions by using ionic liquids: A mini review

High Figure of Merit Optical Buffering in Coupled-Slot Slab Photonic Crystal Waveguide with Ionic Liquid

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