BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
[C2mim][CH3SO3]?A Suitable New Heat Transfer Fluid? Part 2: Thermophysical Properties of Its Mixtures with Water

Participants in the publication
Francisco E. B. Bioucas (Author)
CQE
Carla S. G. P. Queirós (Author)
CQE
Daniel Lozano-Martín (Author)
UNIVERSIDADE DE VALLADOLID
M. S. Ferreira (Author)
Xavier Paredes (Author)
Dep. Química e Bioquímica
CQE
Ângela F. Santos (Author)
Dep. Química e Bioquímica
CQE
Fernando J. V. Santos (Author)
Dep. Química e Bioquímica
CQE
Manuel L. M. Lopes (Author)
Dep. Química e Bioquímica
CQE
Isabel M. S. Lampreia (Author)
Dep. Química e Bioquímica
CQE
Maria José V. Lourenço (Author)
Dep. Química e Bioquímica
CQE
Carlos A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE
Klemens Massonne (Author)
BASF AG

Summary
Ionic liquids have proved to be excellent heat transfer fluids and alternatives to common HTF’s used in industry for heat exchangers and other heat transfer equipment. However, its industrial utilization depends on the cost/kg of its production, to be competitive for industrial applications with biphenyl and diphenyl oxide, alkylated aromatics and dimethyl polysiloxane oils, which degrade above 200ºC and possess some environmental problems. The efficiency of a heat transfer fluid depends on the fundamental thermophysical properties influencing convective heat transfer (density, heat capacity, thermal conductivity, and viscosity), as these properties are necessary to calculate the heat transfer coefficients for different heat exchanger geometries.\\nIn part 1, the thermophysical properties of pure 1-ethyl-3-methylimidazolium methanesulfonate [C2mim][CH3SO3] (CAS no. 145022-45-3), (ECOENG™ 110), produced by BASF, under the trade name of Basionics® ST35, with an assay ≥ 97% with ≤ 0.5% water and ≤ 2% chloride (Cl-), were presented, for temperatures slightly below room temperature and up to 355 K. \\nIn this paper we report the thermophysical properties of mixtures of [C2mim][CH3SO3] with water, in the whole concentration range, at P = 0.1 MPa. The properties measured were density and speed of sound (293.15 < T/K < 343.15), viscosity, electrical, thermal conductivity and refractive index (293.15 < T/K < 353.15), and infinite dilution diffusion coefficient of the ionic liquid in water (298.15 K).\\nProperties for the mixture like the isobaric expansion coefficient, the isentropic compressibility, apparent molar volumes, apparent molar isentropic compressions, and the thermodynamic excess properties, like excess molar volume, excess molar isobaric expansion and isentropic compression, excess viscosity, molar refraction, and infinite dilution diffusion coefficients of the cation, the anion and other common anions in ionic liquids were obtained, within this temperature range. The validity of the Walden relation for this ionic liquid was also determined. This amount of experimental information, in addition to recent molecular simulation studies available in the literature permit a clear picture of the structure of these binary mixtures, the influence of composition and temperature, paving the way to a technological discussion of the possible application of these mixtures as new heat transfer fluids or battery electrolytes.

Editor(s)
Phillip E. Savage,


Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Where published
Industrial & Engineering Chemistry Research

Publication Identifiers
ISSN - 0888-5885

Address
Washington, USA

Publisher
American Chemical Society (ACS)



Document Identifiers
DOI - https://doi.org/10.1021/acs.iecr.1c02970
URL - http://dx.doi.org/10.1021/acs.iecr.1c02970

Rankings
SCIMAGO Q1 (2021) - 6 - Chemical Engineering
Google Metrics (2021) - 73 - Chemical and Materials Sciences
SCIMAGO Q1 (2021) - 0.878 - Chemical Engineering

Keywords
1-ethyl-3-methylimidazolium methanesulfonate water Basionics® ST35 ECOENG™ 110 binary mixtures density speed of sound refractive index viscosity electrical conductivity thermal conductivity infinite dilution diffusion coefficient excess properties heat transfer

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