Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

ABSTRACT

As part of our systematic study on physicochemical characterization of glycol-amine systems, thermophysical properties, including refractive index, density, and electrolytic conductivity, measurements were done on aqueous systems containing glycol and 2-amino-2-hydroxymethyl-1,3-propanediol (TRIS). The considered glycols are diethylene glycol (DEG), triethylene glycol (TEG), and tetraethylene glycol (T4EG). The measurements were done over a temperature range of 298.15 to 343.15 K at normal atmospheric pressure. Different concentrations (4 to 16 % by weight TRIS or 56 to 44 % water, in a fixed amount of glycol 40 %) were used. The influences of temperature and compositions on the measured properties were discussed and then correlated based on the equation proposed for aqueous glycol-salt systems. Calculation results show that the applied model was satisfactory in representing the measured properties in the aqueous systems containing the glycols and TRIS.