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Received February 2, 2014
Accepted July 1, 2014
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Excess properties and viscous flow thermodynamics of the binary system 1,2-ethanediamine+triethylene glycol at T=(298.15, 303.15, 308.15, and 313.15) K for CO2 capture
College of Chemical Engineering, Inner Mongolia University of Technology, Huhhot 010051, China
tadzhang@pku.edu.cn
Korean Journal of Chemical Engineering, December 2014, 31(12), 2245-2250(6), 10.1007/s11814-014-0184-2
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Abstract
Liquid densities and viscosities are reported for the binary system of 1,2-ethanediamine (EDA)+triethylene glycol (TEG) at T=(298.15, 303.15, 308.15, and 313.15) K. Densities were measured using a capillary pycnometer and viscosities were determined using an Ubbelohde capillary viscometer. The experimental results are compared with data published in the literatures. Based on the density data and kinematic viscosity data, excess molar volumes (Vm E) and deviation in kinematic viscosity (Δν) were calculated and the calculated results were fitted to a Redlich-Kister equation to obtain the coefficients and estimate the standard deviations between the experimental and calculated quantities. The values of Vm E are negative in the whole composition range, whereas the values of Δν are positive over the major composition range. From kinematic viscosity data, Gibbs energies of activation of viscous flow (ΔG*), enthalpy of activation for viscous flow (ΔH*), and entropy of activation for the viscous flow (ΔS*) were also calculated.
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