Document type
Conference papers
Document subtype
Abstract
Title
The Thermal Conductivity of Ionic Liquids: A Key for New Heat Transfer Fluids
Participants in the publication
Rafael M. Almeida (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
Summary
Ionic liquids (ILs) are salts in the liquid state at room temperature with some relevant properties, namely their low vapor pressure over a large temperature range, and higher thermal conductivity than molecular fluids and molten salts are considered sustainable novel solvents in chemical technology, making them possible candidates for heat transfer applications. Among all known ILs, the ones with imidazolium-based cations are the most studied, given their safety, low cost, low viscosity, non-toxicity, and biodegradability. [1,2]. Recent efforts to recommend reference values for the thermophysical properties of an IUPAC standard ionic liquid, [C6mim][(CF3SO2)2N], showed that there are still problems in experimental data [3]. As so, there is a need to fully understand their properties at a molecular/ionic level in order to understand the thermal conduction in these ILs. This work analyses recent work on the thermal conductivity of pure ionic liquids, reporting new data for [C2mim][(N(CN)2] [4], [C4mim][(N(CN)2] and [C2mim][SCN], while analyzing the effect of the cation and anion on the macroscopic thermal conductivity. The thermal conductivity was measured with a transient hot-wire probe, in the temperature range 303.15 K < T < 348.15 K, with an estimated expanded uncertainty Ur (λ) = 0.02. [5]\n\nSignificant references\n1. D. MacFarlane, M. Kar, J. Pringle, Fundamentals of Ionic Liquids. From Chemistry to Applications. Wiley-VCH Verlag GmbH & Co. KGaA 2017, 1-25. \n2. J. França, C.A. Nieto de Castro, V.M.B. Nunes, M.L.S. Matos Lopes, J. Chem. Eng. Data 2009, 54, 2569-2575. \n3. X. Paredes, C.S.G.P. Queirós, F.J.V. Santos, A.F. Santos, M.S.C.S. Santos, M.J.V. Lourenço, C.A. Nieto de Castro, J. Phys. Chem. Ref. Data, 2020, 49, 043101. \n4. C.A. Nieto de Castro, A. Lamas, C. Magendran, R. Silva, R.M. Almeida, X. Paredes, A.F. Santos, I.M.S. Lampreia, F.J.V. Santos, M.J.V. Lourenço, J. Chem. Eng. Data 2023, to be submitted. \n5. D. Lozano-Martin, S.I.C. Vieira, X. Paredes, M.J.V. Lourenço, C.A. Nieto de Castro, J.V. Sengers, K. Massone, Molecules 2020, 25, 4290.\n
Editor(s)
Alberto Muscio
Date of Publication
2023-09-10
Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
Event
ECPT2023 – 22nd European Conference on Thermophysical Properties, Venice, Italy, September 10-13, 2023
Publication Identifiers
ISBN - 9791221042207
Address
Venice, Italy
Organizers
Associazione Italiana Proprietà Termofisiche, University of Modena and Reggio Emilia, National Research Council of Italy and IUAV University of Venice
Publisher
Associazione Italiana Proprietà Termofisiche
Collection
Book of Abstracts
Number of pages
1
Starting page
65
Document Identifiers
ISBN - 9791221042207