Document type
Conference papers
Document subtype
Abstract
Title
Thermophysical Properties of Ionic Liquid + Water Mixtures. An Insight into their Structure
Participants in the publication
Carlos A. Nieto de Castro (Author)
Dep. Química e Bioquímica
CQE
Xavier Paredes (Author)
Dep. Química e Bioquímica
Carla Queirós (Author)
Dep. Química e Bioquímica
CQE
Fernando J.V. Santos (Author)
Dep. Química e Bioquímica
CQE
Ângela F. santos (Author)
Dep. Química e Bioquímica
CQE
Manuel Matos Lopes (Author)
Dep. Química e Bioquímica
Maria José V. Lourenço (Author)
Dep. Química e Bioquímica
CQE
Summary
Ionic liquid and water mixtures may show very interesting macroscopic behaviour, as reflected in the change of their thermophysical properties with composition and temperature.\\nProperties like density, speed of sound, viscosity, electrical conductivity, thermal conductivity, refractive index and diffusion coefficients (and derived excess properties) have been determined for several systems, and the results obtained in our laboratory will be compared [1-3]. The discussion on the structure of this mixtures at the molecular level will also be based in correlation spectroscopy and computer simulations for mixtures of hydrophilic ionic liquids with water obtained in the literature. The binary systems studied involve the following ionic liquids: [C2mim][OCOCH3], [C2mim][CH3SO3], [C2mim][C2H5SO4], [C2mim][CF3SO3], [C4mim][BF4], [C4mpyr][N(CN)2] and [(CH3)3NOH][OCOCH3]. \\nResults obtained seem to support the existence of different zones, with the predominance of specific interactions cation-anion-water molecules, as sketched in Figure 1. The quantitative scale of the molar fraction is shown (not proportional), as an example, for [C2mim][CH3SO3] + water mixtures [3].\\n\\nREFERENCES\\n\\n[1] Cumicheo, M.C.; Nobre, L.C.S.; Santos, A.F.; Lampreia, I.M.S.; Santos, M.S.C.S.; Santos, F.J.V.; Segura, H.; Nieto de Castro, C.A. Thermophysical properties of 1-butyl-1-methyl-pyrrolidinium dicyanamide +H2O mixtures. J. Chem. Eng. Data 2015, 60, 3766–3775\\n[2] Queirós, C.S.G.P.; Paredes, X.; Avelino, T.F.S.; Bastos, D.E.N.; Ferreira, M.; Santos, F.J.V.; Santos, A.F.; Lopes, M.L.M.; Lourenço, M.J.V.; Pereira, H.; Nieto de Castro, C.A. The Influence of Water on the Thermophysical Properties of 1-Ethyl-3-methylimidazolium Acetate, J. Molecular Liquids, 297 (2020) 111925\\n[3] Bioucas, F.E.B.; Queirós, C.S.G.P.; Lozano-Martín, D.; Ferreira, M.S.; Paredes, X.; Santos, A.F.; Santos, F.J.V.; Lopes, M.L.M.; Lampreia, I.M.S.; Lourenço, M.J.V.; Nieto de Castro, C.A.; Massonne, K. Ind. Eng. Chem. Res., 2022 (in press). https://doi.org/10.1021/acs.iecr.1c02970
Editor(s)
Institute of Chemical Engineering Sciences
Date of Publication
2022-06-05
Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA
Event
28th EUCHEM Conference on Molten Salts and Ionic Liquids
Publication Identifiers
Address
Patras, Greece
Organizers
Institute of Chemical Engineering Sciences