Vapor-Liquid equilibrium in DEEA/H2O/CO2 system; Experiments and modeling

Abstract

Experiment data for vapor-liquid equilibrium (VLE) of CO2 were conducted for DEEA 5M and 2M.The study was performed in two VLE apparatuses from 40 to 120 °C with atmospheric VLE apparatus and high pressure VLE apparatus. The extended UNIQUAC model framework was applied and the model parameters were fitted with experimental data with partial pressure of CO2 for atmospheric VLE and total pressure with high pressure VLE apparatus. Modfit was applied for further optimization. The model predictions are good and give an average absolute relative deviation (AARD) of 26.5 %.Further the model predicted speciation results seems logical. Parity plots were used to show the deviation between the experimental values and model predicted values. Predictions from UNIQUAC for binary system were compared with raoult?s law to look for deviations.