Journal
FLUID PHASE EQUILIBRIA
Volume 473, Issue -, Pages 245-254Publisher
ELSEVIER
DOI: 10.1016/j.fluid.2018.05.032
Keywords
Ethanolamines; Vapor pressure; Heat capacity; Vaporization and sublimation enthalpy; Phase behavior
Funding
- Czech Science Foundation (GACR) [17-03875S]
- Associate Laboratory LSRE-LCM - FEDER through COMPETE2020 - Programa Operacional Cornpetitividade e Internacionalizacao (POCI) [POCI-01-0145-FEDER-006984]
- Portuguese national funds through FCT - Fundacao para a Ciencia e a Tecnologia
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A thermodynamic study of three ethanolamines, 2-(diethylamino)ethanol, 2-(ethylamino)ethanol and 2-(isopropylamino)ethanol, reporting the measurements of vapor pressure, liquid phase heat capacities, and phase behavior is presented in this work. The vapor pressures were measured using a static method in the temperature interval 238-343 K. After a critical assessment of literature data, selected experimental data were correlated using the Cox equation. The liquid phase heat capacities were measured in the temperature range 265-355 K using Tian-Calvet calorimetry and the phase behavior was investigated using differential scanning calorimetry (DSC) starting from 183 K. For 2-(ethylamino)ethanol and 2-(isopropylamino)ethanol, two monotropically related crystalline forms were identified. To our knowledge, vapor pressure and heat capacity for 2-(isopropylamino)ethanol and phase behavior data for 2-(ethylamino)ethanol and 2-(isopropylamino)ethanol are reported for the first time in this work. (C) 2018 Elsevier B.V. All rights reserved.
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