Mutual and Thermal Diffusivity of Binary Mixtures of the Ionic Liquids [BMIM][C(CN)(3)] and [BMIM][B(CN)(4)] with Dissolved CO2 by Dynamic Light Scattering

Rausch MH, Heller A, Herbst J, Koller TM, Bahlmann M, Schulz P, Wasserscheid P, Fröba AP (2014)


Publication Language: English

Publication Type: Journal article, Original article

Subtype: other

Publication year: 2014

Journal

Publisher: American Chemical Society

Book Volume: 118

Pages Range: 4636-4646

Journal Issue: 17

DOI: 10.1021/jp501973s

Abstract

Ionic liqs. (ILs) are promising solvents for gas sepn. processes such as carbon dioxide (CO2) capture from flue gases. For the design of corresponding processes and app., thermophys. properties of ILs contg. dissolved gases are required. In the present study, it is demonstrated that with a single optical setup, mutual and thermal diffusivities as well as refractive indexes can be measured quasi-simultaneously for such mixts. Dynamic light scattering (DLS) from bulk fluids was applied to det. mutual and thermal diffusivities for mixts. of 1-butyl-3-methylimidazolium tricyanomethanide ([BMIM][C(CN)3]) or 1-butyl-3-methylimidazolium tetracyanoborate ([BMIM][B(CN)4]) with dissolved CO2 at temps. from 303.15 to 333.15 K and pressures between 2 and 26 bar in macroscopic thermodn. equil. Good agreement with literature data and only slight differences between the diffusivities measured for the two systems at the same temp. and comparable mole fractions of CO2 were found. Increasing mutual diffusivities with increasing mole fractions of CO2 are consistent with decreasing viscosities reported for other IL-CO2 mixts. in the literature and can be attributed to weakening of mol. interactions by the dissolved gas. For the conditions studied, no dependence of the thermal diffusivity on the temp. or the mole fraction of CO2 could be found. [on SciFinder(R)]

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How to cite

APA:

Rausch, M.H., Heller, A., Herbst, J., Koller, T.M., Bahlmann, M., Schulz, P.,... Fröba, A.P. (2014). Mutual and Thermal Diffusivity of Binary Mixtures of the Ionic Liquids [BMIM][C(CN)(3)] and [BMIM][B(CN)(4)] with Dissolved CO2 by Dynamic Light Scattering. Journal of Physical Chemistry B, 118(17), 4636-4646. https://dx.doi.org/10.1021/jp501973s

MLA:

Rausch, Michael Heinrich, et al. "Mutual and Thermal Diffusivity of Binary Mixtures of the Ionic Liquids [BMIM][C(CN)(3)] and [BMIM][B(CN)(4)] with Dissolved CO2 by Dynamic Light Scattering." Journal of Physical Chemistry B 118.17 (2014): 4636-4646.

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