Solubility of carbon dioxide in the low-viscosity ionic liquid 1-hexyl-3-methylimidazolium tetracyanoborate

Mota-Martinez, Maria T.; Althuluth, Mamoun; Kroon, Maaike C.; Peters, Cor J.

doi:10.1016/j.fluid.2012.06.014

Cited by 57 publications

(60 citation statements)

References 51 publications

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“…Density 6. Surface tension Our results demonstrate that many ionic liquids which have been described as highly CO 2 -philic and moderately viscous, e.g., [C 6 C 1 im]ĳBĲCN) 4 ], 62 do not present favourable economic metrics. Therefore, claiming that an ionic liquid is a promising solvent for carbon capture must not be based solely on the description of the CO 2 capacity, but on a systemic assessment of their various thermophysical properties coupled to a monetised description of their process performance.…”

Section: Discussionmentioning

confidence: 77%

Challenges and opportunities for the utilisation of ionic liquids as solvents for CO₂capture

Mota-Martinez

Brandl

Hallett

et al. 2018

Mol. Syst. Des. Eng.

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Ionic liquids (ILs) have the potential to outperform traditional solvents for CO2 capture, with a great many ILs having been studied to date. In this contribution we present a new approach for their evaluation, and identify which physical properties most infl uence their technical and economic performance. This work highlights a range of potential challenges that ionic liquids will face before they can be applied at process scale, and identifi es some key research opportunities. Ionic liquids have been extensively investigated as promising materials for several gas separation processes, including CO 2 capture. They have the potential to outperform traditional solvents, in terms of their capacity, selectivity, regenerability and stability. In fact, hundreds of ionic liquids have been investigated as potential sorbents for CO 2 capture. However, most studies focus on enhancing equilibrium capacity, and neglect to consider other properties, such as transport properties, and hence ignore the effect that the overall set of properties have on process performance, and therefore on cost. In this study, we propose a new methodology for their evaluation using a range of monetised and non-monetised process performance indices.Our results demonstrate that whilst most research effort is focused on improving CO 2 solubility, viscosity, a transport property, and heat capacity, a thermochemical property, might preclude the use of ionic liquids, even those which are highly CO 2 -philic, and therefore increased effort on addressing the challenges associated with heat capacity and viscosity is an urgent necessity. This work highlights a range of potential challenges that ionic liquids will face before they can be applied at process scale, and identifies some key research opportunities.

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Section: Discussionmentioning

confidence: 77%

Challenges and opportunities for the utilisation of ionic liquids as solvents for CO₂capture

Mota-Martinez

Brandl

Hallett

et al. 2018

Mol. Syst. Des. Eng.

Self Cite

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“…The average relative deviations between the data collected in this work and those already reported [41][42][43][44][45][46][47][48][49] are depicted in Figure 2. The absolute average relative deviations between the data collected in this work and those reported in the literature are 2.…”

Section: Surface Tensionmentioning

confidence: 73%

“…The surface tension of the ILs investigated was determined at atmospheric pressure in the temperature range from (298.15 to 343.15) K. Surface tension data for imidazolium-based ILs with anions functionalized with cyano groups present considerable discrepancies among different authors [41][42][43][44][45][46][47][48][49]. The average relative deviations between the data collected in this work and those already reported [41][42][43][44][45][46][47][48][49] are depicted in Figure 2.…”

Section: Surface Tensionmentioning

confidence: 84%

“…Ionic structures and cation-anion matrix of the studied ILs: ✔, ILs studied; ✘, ILs not studied. Relative deviations between the experimental (γ exp ) and literature (γ lit ) surface tension data: different symbols represent different literature sources while the same color corresponds to the same IL [41][42][43][44][45][46][47][48][49]. Europe PMC Funders Author Manuscripts a Standard uncertainties u are u(T) = 0.1 K and the combined expanded uncertainty U c is U c (γ) = 0.3 mN·m -1 , at the 95% confidence level (k ≈ 2).…”

Section: Supplementary Materialsmentioning

confidence: 99%

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Surface tensions of ionic liquids: Non-regular trend along the number of cyano groups

Almeida

Carvalho

Kurnia

et al. 2016

Fluid Phase Equilibria

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Ionic liquids (ILs) with cyano-functionalized anions are a set of fluids that are still poorly characterized despite their remarkably low viscosities and potential applications. Aiming at providing a comprehensive study on the influence of the number of -CN groups through the surface tension and surface organization of ILs, the surface tensions of imidazolium-based ILs with cyano-functionalized anions were determined at atmospheric pressure and in the ( Therefore, the surface tension of this homologous series does not decrease with the increase of the number of -CN groups at the anion as has been previously shown by studies performed with a more limited matrix of ILs. A maximum in the surface tension and critical temperature was observed for [N(CN) 2 ]-based ILs. Furthermore, a minimum in the surface entropy, indicative of a highly structured surface, was found for the same class of ILs. All these evidences seem to be a result of stronger hydrogen-bonding interactions occurring in [N(CN) 2 ]-based ILs, when compared with the remaining CN-based counterparts, and as sustained by cation-anion interaction energies derived from the Conductor Like Screening Model for Real Solvents (COSMO-RS).

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“…The gas solubility as well as the mass transport of the gas within the IL differ strongly with the nature of its ions so that the efficiency of gas absorbing processes (e.g. in separation and extraction [4][5][6][7][8][9][10]) or gas involving, catalytic reactions (e.g. hydroformulation [11,12], carbonylation [13][14][15][16][17][18], etc.)…”

Section: Introductionmentioning

confidence: 99%

Multiple headspace extraction for gas detection in ionic liquids

Müller

Fühl

Pinkwart

et al. 2014

Journal of Chromatography A

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Solubility of carbon dioxide in the low-viscosity ionic liquid 1-hexyl-3-methylimidazolium tetracyanoborate

Cited by 57 publications

References 51 publications

Challenges and opportunities for the utilisation of ionic liquids as solvents for CO₂capture

Challenges and opportunities for the utilisation of ionic liquids as solvents for CO₂capture

Surface tensions of ionic liquids: Non-regular trend along the number of cyano groups

Multiple headspace extraction for gas detection in ionic liquids

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Solubility of carbon dioxide in the low-viscosity ionic liquid 1-hexyl-3-methylimidazolium tetracyanoborate

Cited by 57 publications

References 51 publications

Challenges and opportunities for the utilisation of ionic liquids as solvents for CO2capture

Challenges and opportunities for the utilisation of ionic liquids as solvents for CO2capture

Surface tensions of ionic liquids: Non-regular trend along the number of cyano groups

Multiple headspace extraction for gas detection in ionic liquids

Contact Info

Product

Resources

About

Challenges and opportunities for the utilisation of ionic liquids as solvents for CO₂capture

Challenges and opportunities for the utilisation of ionic liquids as solvents for CO₂capture