CO2 absorption properties of Brønsted acid–base ionic liquid composed of N,N-dimethylformamide and bis(trifluoromethanesulfonyl)amide

Kodama, Daisuke; Kanakubo, Mitsuhiro; Kokubo, Masaki; Ono, Takeshi; Kawanami, Hajime; Yokoyama, Toshirou; Nanjo, Hiroshi; Kato, Masahiro

doi:10.1016/j.supflu.2010.01.005

Cited by 23 publications

(25 citation statements)

References 18 publications

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“…[DMFH][TFSA] was synthesized according to the procedure reported in our previous study . The synthetic methods for [DMAH][TFSA] and [DMPH][TFSA] were the same as described in the literature .…”

Section: Methodsmentioning

confidence: 99%

“…The physicochemical properties of the PILs have been investigated; for example, the volumetric and transport properties have been reported for the ammonium and phosphonium based PILs. − It is pointed out that the degree of the proton transfer from an acid to a base strongly affects the physical properties, in particular, transport properties. We have also reported that the protic N , N -dimethylformamidium bis(trifluoromethanesulfonyl)amide ([DMFH][TFSA]) absorbs a larger amount of CO 2 (in volume concentration scale) than the typical aprotic 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ([BMIM][TFSA]), which shows the highest class of CO 2 solubility …”

Section: Introductionmentioning

confidence: 99%

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Density, Viscosity, and Electrical Conductivity of Protic Amidium Bis(trifluoromethanesulfonyl)amide Ionic Liquids

et al. 2016

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We investigated the densities, viscosities, and electrical conductivities of the protic amidium-based ionic liquids with bis(trifluoromethanesulfonyl)amide ([TFSA] − ). The cations were N,N-dimethylformamidium, [DMFH] + , N,N-dimethylacetamidium, [DMAH] + , and N,N-dimethylpropionamidium, [DMPH] + . The physical properties were measured over the temperature range from 273.15 to 363.15 K at atmospheric pressure. The densities were correlated with the linear or quadratic equations, and the transport properties were reproduced well with the Vogel−Fulcher− Tammann equation. The densities and the viscosities increased in the following order: [DMAH][TFSA] > [DMPH][TFSA] > [DMFH][TFSA]. The opposite trend was observed for the electrical conductivities. The empirical Walden plots gave the straight lines in all the present ionic liquids. It was found that the data points for [DMFH][TFSA] appreciably fall below [DMPH][TFSA] and [DMAH][TFSA] on the Walden plot.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Density, Viscosity, and Electrical Conductivity of Protic Amidium Bis(trifluoromethanesulfonyl)amide Ionic Liquids

et al. 2016

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“…CO2 + methylimidazolium hexafluorophosphates ionic liquids [ 9], [ 10]; CO2 + 1- [ 15], to mention only a few of them. In general densities present little change with increasing CO2 concentration in the ionic liquid, meaning that these systems present considerable lower volume expansions than those of common organic solvents [ 13], [ 14], [ 16]. This has been interpreted as a consequence of the CO2 is dissolving in the ionic liquid by occupying the bulk free space in the molecule, as confirmed by atomistic simulation [ 17], [ 18] and through Raman spectroscopy [ 19].…”

Section: Introductionmentioning

confidence: 84%

Experimental determination of viscosities and densities of mixtures carbon dioxide+1-allyl-3-methylimidazolium chloride. Viscosity correlation

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Bermejo

et al. 2016

The Journal of Supercritical Fluids

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The effect of viscosity reduction caused by the solubilization of CO2 is studied in order to improve the biomass processing in ionic liquids. To do so, densities and viscosities of the pure ionic liquid 1-allyl-3-methylimidazolium chloride and its mixtures with CO2 up molar fractions of 0.25 and temperatures between 333 and 372 K have been experimentally determined. Viscosities were correlated as a function of temperature and CO2 molar fractions with an average relative error of 2.5%. The viscosities of other mixtures CO2 + ionic liquids were also correlated for other ionic liquids with an average relative error between 4.4 and 13%. In general these ionic liquids present a linear decrease of viscosity with CO2 molar fractions up to around 0.5 that is more pronounced at lower temperatures and depends of each ionic liquid, and can reach between 60-100% viscosi-2 ty reduction with respect the viscosity of the pure ionic liquid, making the CO2 a promising co-solvent for viscosity reduction in process with ionic liquids.

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“…Therefore, carbon capture and storage (CCS) becomes an important issue for an environmentally benign and sustainable development. Ionic liquids (ILs) as novel green solvents have unique peculiarities such as their almost negligible vapor pressure, high thermal and chemical stability, tunable chemical structures, and low‐melting point, which make them a promising alternative for the replacement of volatile organic solvents in gas absorption and separation . However, in some cases, e.g., the syngas purification for Fischer‐Tropsch (FT) synthesis and the production of NH 3 , the content of CO 2 for syngas is usually limited to ppm level (2 ppm to 3% by volume depending on the type of synthesis) before reaction, and the absorption process operating above room temperature could not meet the requirement because the solubility of CO 2 in ILs decreases with increasing temperature.…”

Section: Introductionmentioning

confidence: 99%

UNIFAC model for ionic liquid‐CO₂ systems

et al. 2013

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The new group binary interaction parameters of UNIFAC model (anm and amn) between CO2 and 22 ionic liquid (IL) groups were obtained by means of correlating the solubility data of CO2 in pure ILs at different temperatures (>273.2 K). We measured the CO2 solubility at low temperatures down to 243.2 K in pure ILs, i.e., [OMIM]+[BF4]− and [OMIM]+[Tf2N]−, and their equimolar amount of mixture, in order to fill the blank of solubility data at low temperatures and also to justify the applicability of UNIFAC model over a wider temperature range. It was verified that UNIFAC model can be used for predicting the CO2 solubility in pure ILs and in the binary mixture of ILs both at high (>273.2 K) and low temperatures (<273.2 K) effectively, as well as identifying the new structure–property relation. This is the first work to extend the UNIFAC model to IL‐CO2 systems. © 2013 American Institute of Chemical Engineers AIChE J 60: 716–729, 2014

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CO2 absorption properties of Brønsted acid–base ionic liquid composed of N,N-dimethylformamide and bis(trifluoromethanesulfonyl)amide

Cited by 23 publications

References 18 publications

Density, Viscosity, and Electrical Conductivity of Protic Amidium Bis(trifluoromethanesulfonyl)amide Ionic Liquids

Density, Viscosity, and Electrical Conductivity of Protic Amidium Bis(trifluoromethanesulfonyl)amide Ionic Liquids

Experimental determination of viscosities and densities of mixtures carbon dioxide+1-allyl-3-methylimidazolium chloride. Viscosity correlation

UNIFAC model for ionic liquid‐CO₂ systems

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CO2 absorption properties of Brønsted acid–base ionic liquid composed of N,N-dimethylformamide and bis(trifluoromethanesulfonyl)amide

Cited by 23 publications

References 18 publications

Density, Viscosity, and Electrical Conductivity of Protic Amidium Bis(trifluoromethanesulfonyl)amide Ionic Liquids

Density, Viscosity, and Electrical Conductivity of Protic Amidium Bis(trifluoromethanesulfonyl)amide Ionic Liquids

Experimental determination of viscosities and densities of mixtures carbon dioxide+1-allyl-3-methylimidazolium chloride. Viscosity correlation

UNIFAC model for ionic liquid‐CO2 systems

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UNIFAC model for ionic liquid‐CO₂ systems