Physicochemical properties of tri(butyl)ethylphosphonium diethylphosphate aqueous mixtures
Marta Królikowska , Maciej Zawadzki
AbstractThis work presents the new experimental data on physical and thermodynamic properties of binary system composed of tri(butyl)ethylphosphonium diethylphosphate and water: solid-liquid equilibrium (SLE) and vapor-liquid equilibrium (VLE) phase diagrams as well as the excess enthalpy of mixing. SLE phase diagram has been determined at wide temperature and composition range using two techniques: dynamic method and differential scanning calorimetry (DSC). Interesting behavior with a solid compound formation was observed for the studied mixture. The isothermal VLE have been measured by an ebulliometric method within temperature range from T = (328.15 to 368.15) K and pressure up to 100 kPa. The excess enthalpy for the tested binary system was determined at T = 298.15 K using isothermal titration calorimeter. Liquid density for pure IL and the binary mixtures with water has been determined at temperature range from T = (298.15 to 348.15) K and from experimental data, the excess molar volumes were calculated. The influence of temperature and composition on measured properties is discussed in terms of IL-water molecular interactions. Furthermore, the binary mixture under study was discussed as an alternative working pair for the absorption heat pump cycle.
|Journal series||Journal of Molecular Liquids, ISSN 0167-7322|
|Publication size in sheets||0.5|
|Keywords in English||Ionic liquidsWaterPhase behaviorExcess enthalpyDensityHydrate formation|
|project||[IP2015 037974 POL] Ciecze jonowe jako nowej generacji dodatki do płynów chłodniczych w technologii chłodnictwa absorpcyjnego. . Project leader: Królikowska Marta,
, application date 08-10-2015, start date 12-10-2016, planned end date 31-12-2019, Implemented
|Score|| = 30.0, 20-12-2017, ArticleFromJournal|
= 30.0, 20-12-2017, ArticleFromJournal
|Publication indicators||: 2016 = 3.648 (2) - 2016=3.187 (5)|
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