Introduction to properties of ionic liquid mixtures

Zhang, Suojiang; Zhou, Qing; Lü, Xingmei; Song, Yuting; Wang, Xinxin

doi:10.1007/978-94-017-7573-1_1

Cited by 7 publications

(8 citation statements)

References 195 publications

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“…The addition of fluorinated solvents to an IL can offer other unique properties (e.g., tailored solvation ability, chemical inertness) and significantly change its physical properties, including higher ionic conductivity and reduced viscosity. , For example, fluorinated solvent/IL-based electrolytes have recently found interest in the field of lithium–sulfur batteries − where they display high fluidity and also inhibit polysulfide dissolution. Hence, the transport properties of these fluorinated solvent/IL-based electrolytes present high relevance with regard to the reaction rate at which the NRR takes place.…”

Section: Introductionmentioning

confidence: 99%

High Nitrogen Gas Solubility and Physicochemical Properties of [C₄mpyr][eFAP]–Fluorinated Solvent Mixtures

2019

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Electrochemical ammonia synthesis at ambient temperature and pressure shows promise as a route to a carbon-free chemical fuel for renewable energy transportation and storage. However, before this process can be industrialized, issues with the low faradaic efficiencies for the nitrogen reduction reaction must be overcome. This stems from the low nitrogen (N2) solubility in commonly used aqueous electrolytes and the hydrogen evolution reaction that is usually the more dominant process therein. On the other hand, fluorinated ionic liquid (IL)-based electrolytes can dissolve large amounts of N2 and reduce the extent of the hydrogen evolution reaction. In this work, the IL 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl) trifluorophosphate [C4mpyr][eFAP] was studied in binary mixtures with three fluorinated solvents: trifluorotoluene, 1H,1H,2H-heptafluorocyclopentane, and 1H,1H,5H-octafluoropentyl 1,1,2,2-tetrafluoroethyl ether, all of which were found to have high N2 solubility. The salt–solvent mixtures were found to be miscible in all proportions. The N2 solubility followed an increasing trend with increasing volume fraction of the fluorinated solvent. The interactions within these binary mixtures were investigated in terms of their volumetric properties, revealing negative values of excess molar volume that were also correlated with higher than expected measured viscosity ratios. The thermodynamic properties of solvation in relation to the role of free volume and the effects of fluorous domains are discussed. At compositions around χ2 ≈ 0.2, the mixtures showed a maximum in ionic conductivity and this was examined in terms of ionicity. This study demonstrates the scope for the design of fluorinated IL-based electrolytes for electrochemical nitrogen reduction, both in terms of N2 solubility and mass transport properties.

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Section: Introductionmentioning

confidence: 99%

High Nitrogen Gas Solubility and Physicochemical Properties of [C₄mpyr][eFAP]–Fluorinated Solvent Mixtures

2019

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“…The value of the membrane resistance R MEMB was calculated from the F P value of the virgin membrane and the resistance values attributable to the ILs were derived from the corresponding F P values once R MEMB was known. According to the figures in Table 2 [62][63][64][65][66][67].…”

Section: Resultsmentioning

confidence: 99%

Supported Ionic Liquid Membranes for Separation of Lignin Aqueous Solutions

et al. 2018

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Lignin valorization is a key aspect to design sustainable management systems for lignocellulosic biomass. The successful implementation of bio-refineries requires high value added applications for the chemicals derived from lignin. Without effective separation processes, the achievement of this purpose is difficult. Supported ionic liquid membranes can play a relevant role in the separation and purification of lignocellulosic components. This work investigated different supported ionic liquid membranes for selective transport of two different types of technical lignins (Kraft lignin and lignosulphonate) and monosaccharides (xylose and glucose) in aqueous solution. Although five different membrane supports and nine ionic liquids were tested, only the system composed by [BMIM][DBP] as an ionic liquid and polytetrafluoroethylene (PTFE) as a membrane support allowed the selective transport of the tested solutes. The results obtained with this selective membrane demonstrated that lignins were more slowly transferred from the feed compartment to the stripping compartment through the membrane than the monosaccharides. A model was proposed to calculate the effective mass transfer constants of the solutes through the membrane (values in the range 0.5–2.0 × 10−3 m/h). Nevertheless, the stability of this identified selective membrane and its potential to be implemented in effective separation processes must be further analyzed.

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“…[5][6][7][8][9][10] It's no surprise that considerable attention is drawn to the study of their physicochemical properties. [11][12][13][14][15][16][17][18] The research in this eld focuses on the establishment of a correlation between the physicochemical properties of ILs and the properties of dissolved substances and IL solutions. A variety of experimental and theoretical methods have been used to study the properties of ILs (see, for instance in ref.…”

Section: Introductionmentioning

confidence: 99%

Strongly diluted dimethyl-imidazolium chloride–alcohol solutions: solvents are structurally different but dynamic heterogeneities are similar

et al. 2021

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Introduction to properties of ionic liquid mixtures

Cited by 7 publications

References 195 publications

High Nitrogen Gas Solubility and Physicochemical Properties of [C₄mpyr][eFAP]–Fluorinated Solvent Mixtures

High Nitrogen Gas Solubility and Physicochemical Properties of [C₄mpyr][eFAP]–Fluorinated Solvent Mixtures

Supported Ionic Liquid Membranes for Separation of Lignin Aqueous Solutions

Strongly diluted dimethyl-imidazolium chloride–alcohol solutions: solvents are structurally different but dynamic heterogeneities are similar

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Introduction to properties of ionic liquid mixtures

Cited by 7 publications

References 195 publications

High Nitrogen Gas Solubility and Physicochemical Properties of [C4mpyr][eFAP]–Fluorinated Solvent Mixtures

High Nitrogen Gas Solubility and Physicochemical Properties of [C4mpyr][eFAP]–Fluorinated Solvent Mixtures

Supported Ionic Liquid Membranes for Separation of Lignin Aqueous Solutions

Strongly diluted dimethyl-imidazolium chloride–alcohol solutions: solvents are structurally different but dynamic heterogeneities are similar

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High Nitrogen Gas Solubility and Physicochemical Properties of [C₄mpyr][eFAP]–Fluorinated Solvent Mixtures

High Nitrogen Gas Solubility and Physicochemical Properties of [C₄mpyr][eFAP]–Fluorinated Solvent Mixtures