Angela LAMAS1, Xavier PAREDES2, Santos ÂNGELA1, Isabel M.s. LAMPREIA1, Fernando J.v. SANTOS1, Maria José V. LOURENÇO1, Carlos A. NIETO DE CASTRO1
1Centro de Química Estrutural, Faculdade de Ciências da Universidade de Lisboa, Lisboa, Portugal
2Grupo de Termodinámica y Calibración (TERMOCAL), Research Institute on Bioeconomy, Escuela de Ingenierías Industriales, Universidad de Valladolid, Valladolid, Spain
The ionic liquid 1-dodecyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide [C12mim][(CF3SO2)2N] has been studied for several applications, like gas solubility1, phase equilibrium studies in binary and ternary systems2,3 separation of butan-1-ol/water, one of the important industrial processes, thermal energy storage4, and some studies on the thermophysical properties5,6 and nanostructure7 have been performed. The main justification is that increasing the length of the carbon chain increases the heat capacity and therefore has excellent thermal properties for use as TES media and heat transfer media for solar thermal power plant systems compared with traditional media (i.e. thermal oils)4.
In order to confirm this last possibility, density, viscosity and thermal conductivity of [C12mim][(CF3SO2)2N] has been measured for the density, speed of sound, viscosity and thermal conductivity for 293.15 < T / K < 343.15, at P = 0.1 MPa. In addition, the ionanofluid with graphene was studied by measuring viscosity and thermal conductivity, trying to contribute to the fact that long alkyl chains in alkylimidazolium liquids might contribute to the stabilazation of the particle dispersion in the nanofluid. The results obtained will be presented and discussed.
This work was supported by Fundação para a Ciência e Tecnologia, Portugal, through projects UID/QUI/00100/2013, UID/QUI/00100/2019, and UIDB/00100/2020, and by the Doctorado en Ingeniería de Procesos de Minerales, Universidad de Antofagasta, Chile, for the stay of Ms Angela Lamas in our laboratories (FONDAP/15110019)
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