Gas Solubility in Ionic Liquids

Lei, Zhigang; Dai, Chengna; Chen, Biaohua

doi:10.1021/cr300497a

Cited by 890 publications

(749 citation statements)

References 346 publications

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“…Monoatomic, diatomic, non-polar or gases with low polarizability present the lowest solubilities in the ionic liquid [C 1 C 4 Im][BF 4 ]. Unsaturated hydrocarbons frequently present a higher solubility in ionic liquids than their saturated counterparts and so these fluids are considered promising for saturated/unsaturated hydrocarbon separation.…”

Section: Ionic Liquids As Separating Agentsmentioning

confidence: 99%

“…Unsaturated hydrocarbons frequently present a higher solubility in ionic liquids than their saturated counterparts and so these fluids are considered promising for saturated/unsaturated hydrocarbon separation. The exact reasons for the observed trends are still poorly understood, even if they are essential for the development of new gas separation processes [3,4].…”

Section: Ionic Liquids As Separating Agentsmentioning

confidence: 99%

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Gaseous Hydrocarbon Separations Using Functionalized Ionic Liquids

Moura

Santini

Gomes

2016

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-The functionalization of the side chains on the cation or the anion of an ionic liquid is a common approach to tailor its properties for different processes including the separation of gases. In this paper, we present the current state of the art concerning the usage of ionic liquids for hydrocarbon separations. We also show how the functionalization of ionic liquids or the appropriate anion/cation combinations can contribute to the increase of the performance of the ionic liquids for the separation of gaseous hydrocarbons -either by improving the capacity of the ionic liquid to absorb a given gas or by increasing the selectivity towards a particular hydrocarbon. Original results concerning the usage of olefin-complexing metal salts of lithium (I), nickel (II) and copper (II) dissolved in ionic liquids for selectively absorbing light olefins are presented. It is observed that the absorption capacity of an imidazolium-based ionic liquid is doubled by the addition of a copper (II) salt. This result is compared with the effect of the functionalization of the ionic liquid and the advantages and difficulties of the two approaches are analyzed.Résumé -Liquides ioniques fonctionnalisés pour la séparation d'hydrocarbures gazeux -La fonctionnalisation des chaînes latérales sur le cation ou l'anion d'un liquide ionique est une approche commune pour adapter ses propriétés pour les différents processus, y compris la séparation de gaz. Dans cet article, nous présentons l'état actuel des recherches concernant l'utilisation de liquides ioniques pour les séparations d'hydrocarbures gazeux. Nous montrons comment la fonctionnalisation de liquides ioniques ou des combinaisons d'anions/cations appropriées peuvent contribuer à l'augmentation de leur performance pour la séparation des hydrocarbures gazeux -soit par l'amélioration de la capacité du liquide ionique pour absorber un gaz donné ou en augmentant la sélectivité pour un hydrocarbure particulier. Des résultats originaux concernant l'utilisation de sels métalliques de lithium (I), le nickel (II) et le cuivre (II) dissous dans des liquides ioniques pour absorber sélectivement des oléfines légères sont présentés. On constate que la capacité d'absorption d'un liquide ionique à base d'imidazolium est doublée par addition d'un sel de cuivre (II). Ce résultat est comparé avec l'effet de la fonctionnalisation du liquide ionique. Les avantages et les difficultés de ces deux approches sont analysés.

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Section: Ionic Liquids As Separating Agentsmentioning

confidence: 99%

Section: Ionic Liquids As Separating Agentsmentioning

confidence: 99%

Gaseous Hydrocarbon Separations Using Functionalized Ionic Liquids

Moura

Santini

Gomes

2016

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…They included a cuvette that was filled with a sensing cocktail IL-BTB (or IL-HPTS) with the additive of a base (NaHCO3 or TBAOH). The solubility of CO2 in the used ILs was at least 10 -20 times higher than its solubility in the conventional solvents, polymer matrices or water, 27 that could be a result of the formation of weak acid-base complexes between CO2 (the electron-pair acceptor) and the IL anion (the electron-pair donor). 109,[116][117][118] Additionally, the hydrophobic polydimethylsiloxane-based silicone matrix exhibited excellent permeability to CO2.…”

Section: ·6 Other Functionsmentioning

confidence: 96%

“…ILs can dissolve inorganic gases (O2, CO2, CO, SO2, NO2, H2S, etc. ), 24,27 silicon alkoxides (tetramethoxysilane, TMOS; tetraethoxysilane, TEOS; methyltrimethoxysilane, MTMOS), 28 mono-and polysaccharides (carbohydrates, starch, cellulose, chitin, chitosan, guar gum, and xanthan gum), 10,[29][30][31][32] natural organic materials (silk 17 and wood 29,33,34 ), some synthetic polymers, 35,36 enzymes, [37][38][39] etc. The listed substances can serve either as matrix materials (natural and synthetic polymers) or recognition elements (dyes, complexes, and biocatalysts), and target compounds (gases) for optical sensing platforms.…”

Section: Introductionmentioning

confidence: 99%

Applications of Ionic Liquids for the Development of Optical Chemical Sensors and Biosensors

et al. 2017

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This paper reviews the primary literature reporting the use of ionic liquids (ILs) in optical sensing technologies. The optical chemical sensors that have been developed with the assistance of ILs are classified according to the type of resultant material. Key aspects of applying ILs in such sensors are revealed and discussed. They include using ILs as solvents for the synthesis of sensor matrix materials; additives in polymer matrices; matrix materials; modifiers of the surfaces; and multifunctional sensor components. The operational principles, design, texture, and analytical characteristics of the offered sensors for determining CO2, O2, metal ions, CN -, and various organic compounds are critically discussed. The key advantages and disadvantages of using ILs in optical sensing technologies are defined. Finally, the applicability of the described materials for chemical analysis is evaluated, and possibilities for their further modernization are outlined.

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“…Room-temperature ionic liquids (RTILs) [1][2][3][4][5][6][7][8][9][10][11] constitute an active research field.…”

Section: Introductionmentioning

confidence: 99%

Polarization versus Temperature in Pyridinium Ionic Liquids

Chaban

Prezhdo

2014

J. Phys. Chem. B

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Abstract. Electronic polarization and charge transfer effects play a crucial role in thermodynamic, structural and transport properties of room-temperature ionic liquids (RTILs).These non-additive interactions constitute a useful tool for tuning physical chemical behavior of RTILs. Polarization and charge transfer generally decay as temperature increases, although their presence should be expected over an entire condensed state temperature range. For the first time, we use three popular pyridinium-based RTILs to investigate temperature dependence of electronic polarization in RTILs. Atom-centered density matrix propagation molecular dynamics, supplemented by a weak coupling to an external bath, is used to simulate the temperature impact on system properties. We show that, quite surprisingly, non-additivity in the cation-anion interactions changes negligibly between 300 and 900 K, while the average dipole moment increases due to thermal fluctuations of geometries. Our results contribute to the fundamental understanding of electronic effects in the condensed phase of ionic systems and foster progress in physical chemistry and engineering.

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Gas Solubility in Ionic Liquids

Cited by 890 publications

References 346 publications

Gaseous Hydrocarbon Separations Using Functionalized Ionic Liquids

Gaseous Hydrocarbon Separations Using Functionalized Ionic Liquids

Applications of Ionic Liquids for the Development of Optical Chemical Sensors and Biosensors

Polarization versus Temperature in Pyridinium Ionic Liquids

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