2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 9: Molten Salts and Ionic Liquids, Energy Production
| Editors: | Kongoli F, Gaune-Escard M, Turna T, Mauntz M, Dodds H.L. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 390 pages |
| ISBN: | 978-1-987820-24-9 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Structure, thermophysical and electrochemical properties of copper ionic liquid analogous
Florinela Sirbu1; Ana-Maria Julieta Popescu2; Cristina Donath2; Virgil Constantin3;1INSTITUTE OF PHYSICAL CHEMISTRY “ILIE MURGULESCU”OF THE ROMANIAN ACADEMY, Bucharest,, Romania; 2ILIE MURGULESCU INSTITUTE OF PHYSICAL CHEMISTRY, LABORATORY OF MOLTEN SALTS, Bucharest, Romania; 3ILIE MURGULESCU INSTITUTE OF PHYSICAL CHEMISTRY, Bucharest, Romania;
Type of Paper: Regular
Id Paper: 134
Topic: 13
Abstract:
The structure, thermophysical and electrochemical properties of copper ionic liquid analogous compared with choline chloride (ChCl)-urea is reported. The structure of the ionic liquid analogous is preliminarily investigated by Fourier transform infrared spectroscopy. The physical properties of the ionic liquid such as density, speed of sound refractive index, electrical conductivity, molar conductivity were measured as the function of temperature and composition. We used the following compositions: ChCl-Urea (1:2)M, ChCl-Urea-CuCl (1:2:0.05)M , ChCl-Urea-CuCl (1:2:0.1)M and ChCl-Urea-CuCl2 (1:2:0.1)M . Using the measured data of density, speed of sound, and refractive index, the following thermodynamical parameters such as isentropic or adiabatic compressibility coefficient and molar refractivity have been computed with the standard relations. Calculated values of the acoustic impedance adiabatic compressibility, space filling factor , specific refraction and relaxation strength at various temperatures were calculated for the studied ionic liquids. Also were determined the coefficients of thermal expansion, molecular volume, standard entropy and lattice energy at different temperatures. Fitting parameters, correlation coefficient R2 obtained for density, the speed of sound and refractive index along with the absolute average percentage deviation AAD % are reported for all studied LIs. Calculated values of refractive index for the studied ionic liquids, using the relation between refractive index and density, were also correlated from several empirical equations. The electrical conductivity and correlations for its temperature dependence were established and discussed in terms of Arrhenius theory. The electrochemical potential window of ChCl-urea and the electrochemical behaviour of ChCl-urea-CuCl/CuCl2 were also determined by cyclic voltammetry.
Keywords: thermodynamics of ionic liquids (ionic liquids, FTIR, density, speed of sound, refractive index, conductivity, correlation)