Influence of temperature and pressure on the density and speed of sound of 2-hydroxyethylammonium propionate ionic liquid
authors Sarabando, JA; Magano, PJM; Ferreira, AGM; Santos, JB; Carvalho, PJ; Mattedi, S; Fonseca, IMA
nationality International
journal JOURNAL OF CHEMICAL THERMODYNAMICS
author keywords 2-Hydroxyethylammonium propionate; Density; Speed of sound; GMA equation of state; Wu equation
keywords COHESIVE ENERGY DENSITY; EQUATION-OF-STATE; INTERNAL-PRESSURE; KNOEVENAGEL CONDENSATION; TRIETHANOLAMINE STEARATE; THERMODYNAMIC PROPERTIES; ACOUSTICAL PROPERTIES; ALDOL CONDENSATIONS; ETHANOLAMINE OLEATE; PHYSICAL-PROPERTIES
abstract The alkanolammonium ILs are protic ionic liquids (PILs) with huge potential in a variety of industrial fields. Among other advantages, these PILs have low cost of preparation, simple synthesis and purification methodologies and low toxicity. This study aims at obtaining significant data on the fundamental thermophysical properties of hydroxyethylammonium-based PILs with carboxylate anions. The density was measured within the temperature and pressure intervals (298.15-343.15) K and (0.1-35.0) MPa for 2-hydroxyethylammonium propionate, [2-HEA][Pr]. The speed of sound was determined in the ranges (303.15-353.15) K and (0.1-20.0) MPa for the same substance. The estimated combined standard uncertainties are +/- 0.45 kg.m (3) for density and +/- 1.6 m.s(-1) for speed of sound. The experimental pVT data were fitted using the Goharshadi-Morsali-Abbaspour equation of state (GMA EoS) with average relative absolute deviation (%AARD) of 0.03%. Thermomechanical coefficients as the thermal expansivity, isothermal compressibility, and internal pressure, were calculated using GMA EoS with the internal pressure being further compared with calculated values of cohesive energy density. The experimental pVT data were further successfully described by the predictive methods of Gardas and Coutinho and Paduszynki and Domanska. (C) 2018 Elsevier Ltd.
publisher ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
issn 0021-9614
year published 2018
volume 122
beginning page 183
ending page 193
digital object identifier (doi) 10.1016/j.jct.2018.03.016
web of science category Thermodynamics; Chemistry, Physical
subject category Thermodynamics; Chemistry
unique article identifier WOS:000432586900018
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