Measurements and Correlation of High-Pressure Densities of Phosphonium Based Ionic Liquids

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• 作者：Luciana I. N. Tome虂 ; Ramesh L. Gardas ; Pedro J. Carvalho ; Maria Jose虂 Pastoriza-Gallego ; Manuel M. Pin虄eiro ; Joa虄o A. P. Coutinho
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2011
• 出版时间：May 12, 2011
• 年：2011
• 卷：56
• 期：5
• 页码：2205-2217
• 全文大小：1111K
• 年卷期：v.56,no.5(May 12, 2011)
• ISSN：1520-5134

文摘

Experimental density measurements are reported along with the derived thermodynamic properties (isothermal compressibility, isobaric expansivity, and thermal pressure coefficient) for trihexyltetradecylphosphonium-based ionic liquids鈥攃hloride, bromide, bis(trifluoromethylsulfonyl)imide, dicyanamide and methyl sulfonate鈥攊n the pressure range (0.10 to 45.00 MPa) and temperature range (283.15 to 333.15) K. The effect of the anion of the ionic liquid on the properties under study was evaluated. Experimental densities were correlated using the Tait equation, the modified cell model equation of state, and the Sanchez鈭扡acombe equation of state, and compared against the predictive method proposed by Gardas and Coutinho. It is shown that the three correlations describe well all the ILs studied, with the Tait equation providing the lowest average relative deviation (less than 0.004 %) and the Sanchez鈭扡acombe equation of state the highest (inferior to 0.5 %), and that the predicted densities estimated by Gardas and Coutinho method are in good agreement with the experimental densities determined.