Thermodynamic Modeling of Vapor-Liquid Equilibrium of Aqueous N-methyldiethanolamine Solution Using N-NRTL-NRF model
Volume Title: 1
Department of Chemical Engineering, Hamedan University of Technology, Hamedan, Iran
One of the chemical solvents which are widely used in the oil, gas, and chemical industries is The N-methyldiethanolamine (MDEA). The blending of MDEA with water especially uses in the natural gas sweetening and power plant flue gas treatment for the absorption of carbon dioxide and hydrogen sulfide. In this work the nonelectrolyte NRTL nonrandom factor (N-NRTL-NRF) model that is one of the local composition activity coefficient models is used to correlate the vapor-liquid equilibrium (VLE) of the binary aqueous MDEA solution at the various condition. Also, to check the power of the model for prediction of the other properties of this aqueous mixture, the excess enthalpy of this system at 298.15 K, 101.3 kPa, and whole range of composition is predicted. The results show that the N-NRTL-NRF model can describe the vapor-liquid equilibrium of binary aqueous MDEA solution very well and in following predict the excess enthalpy excellently. The vapor-liquid equilibrium and excess enthalpy are two major properties for industrial applications such as for the design of the process equipment.
N-methyldiethanolamine; N-NRTL-NRF; Aqueous MDEA solution; Vapor-liquid equilibrium; Excess enthalpy