Journal of Thermal Analysis and Calorimetry

, Volume 123, Issue 1, pp 785–791 | Cite as

Density and excess properties of N-methyldiethanolamine (MDEA) with 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate [hmim][FAP]

  • Majid Majeed Akbar
  • Fareeda Chemat
  • Appusamy Arunagiri
  • Thanabalan Murugesan


In the present work, new data on the densities and refractive indices for 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate [hmim][FAP] with N-methyldiethanolamine are reported for various concentrations and at temperatures (303.15–328.15) K. Excess molar volumes \({V^{\text{E}}}\) and excess refractive indices \( n_{\text{D}}^{\text{E}}\) were calculated from the experimental data. Refractive index values for the binary mixtures were predicted by using Lorentz–Lorenz, Gladstone–Dale and Eykman equations. Excess molar volumes showed positive trend, whereas excess refractive indices showed negative trend over the entire range of temperatures and concentrations studied in the present research.


Density Excess molar volume Refractive index 1-hexyl-3-methylimidazolium tris(pentafluoroethyl)trifluorophosphate Methyldiethanolamine 



The financial support by MyRA-Malaysia incentive grant through CO2 Rich Natural Gas Value Chain Program is highly appreciated.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2015

Authors and Affiliations

  • Majid Majeed Akbar
    • 1
  • Fareeda Chemat
    • 3
  • Appusamy Arunagiri
    • 2
  • Thanabalan Murugesan
    • 3
  1. 1.Institute of Chemical Engineering and TechnologyUniversity of the PunjabLahorePakistan
  2. 2.Department of Chemical EngineeringNational Institute of TechnologyTrichyIndia
  3. 3.Chemical Engineering DepartmentUniversiti Teknologi PETRONASTronohMalaysia

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