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

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Rausch MH, Heller A, Herbst J, Koller TM, Bahlmann M, Schulz P, Wasserscheid P, Fröba AP
Zeitschrift: Journal of Physical Chemistry B
Verlag: American Chemical Society
Jahr der Veröffentlichung: 2014
Band: 118
Heftnummer: 17
Seitenbereich: 4636-4646
ISSN: 1520-6106
eISSN: 1520-5207
Sprache: Englisch


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)]



FAU-Autoren / FAU-Herausgeber

Bahlmann, Matthias
Lehrstuhl für Chemische Reaktionstechnik
Fröba, Andreas Paul Prof. Dr.-Ing.
Professur für Advanced Optical Technologies - Thermophysical Properties
Heller, Andreas
Professur für Advanced Optical Technologies - Thermophysical Properties
Koller, Thomas Manfred Dr.-Ing.
Professur für Advanced Optical Technologies - Thermophysical Properties
Rausch, Michael Heinrich Dr.-Ing.
Lehrstuhl für Technische Thermodynamik
Schulz, Peter Dr.
Lehrstuhl für Chemische Reaktionstechnik
Wasserscheid, Peter Prof. Dr.
Lehrstuhl für Chemische Reaktionstechnik


Zitierweisen

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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