Thermophysical property characterization of ternary system containing {glycol (DEG/TEG/T4EG)+2-amino-2-hydroxymethyl-1,3-propanediol plus water}

As part of our systematic study on physicochemical characterization of (glycol + amine) systems, thermophysical properties, including refractive index, density, and electrolytic conductivity measurements were carried out on aqueous systems containing glycol and 2-amino-2-hydroxymethyl-1,3-propanediol (TRIS). The glycols studied are diethylene glycol (DEG), triethylene glycol (TEG), and tetraethylene glycol (T(4)EG). 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 40% glycol were used. The influences of temperature and compositions on the measured properties are discussed and then correlated based on the equation proposed for aqueous (glycol + salt) systems. Calculated results show that the applied model is satisfactory in representing the measured properties in the aqueous systems containing the glycols and TRIS. (C) 2013 Elsevier Ltd. All rights reserved.