Publication Type Journal Article
Title Thermal Conductivity of Metastable Ionic Liquid [C(2)mim][CH3SO3]
Authors Daniel Lozano-Martin Salome Ines Cardoso Vieira X. Paredes M J V Lourenco CA Nieto de Castro V Sengers Klemens Massonne
Groups MTFT
Journal MOLECULES
Year 2020
Month September
Volume 25
Number 18
Pages
Abstract Ionic liquids have been suggested as new engineering fluids, namely in the area of heat transfer, as alternatives to current biphenyl and diphenyl oxide, alkylated aromatics and dimethyl polysiloxane oils, which degrade above 200 degrees C and pose some environmental problems. Recently, we have proposed 1-ethyl-3-methylimidazolium methanesulfonate, [C(2)mim][CH3SO3], as a new heat transfer fluid, because of its thermophysical and toxicological properties. However, there are some interesting points raised in this work, namely the possibility of the existence of liquid metastability below the melting point (303 K) or second order-disorder transitions (lambda-type) before reaching the calorimetric freezing point. This paper analyses in more detail this zone of the phase diagram of the pure fluid, by reporting accurate thermal-conductivity measurements between 278 and 355 K with an estimated uncertainty of 2\% at a 95\% confidence level. A new value of the melting temperature is also reported, T-melt = 307.8 +/- 1 K. Results obtained support liquid metastability behaviour in the solid-phase region and permit the use of this ionic liquid at a heat transfer fluid at temperatures below its melting point. Thermal conductivity models based on Bridgman theory and estimation formulas were also used in this work, failing to predict the experimental data within its uncertainty.
DOI http://dx.doi.org/10.3390/molecules25184290
ISBN
Publisher MDPI
Book Title
ISSN
EISSN 1420-3049
Conference Name
Bibtex ID ISI:000581235700001
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