Vapor Liquid Equilibrium (VLE) in H2O-Amine-CO2 system

Abstract

New experimental data for vapor-liquid equilibrium of CO2 in aqueous solutions of 3M/26.84% wt, 1M/9% wt and 0.1M/0.89% wt AMP (2-amino-2-methyl-1-propanol) and 1.5M PZ are reported from 313 to 393K. Low pressure/temperature equilibrium apparatus was used to measure the CO2 partial pressure over loaded AMP solutions while total pressure was measured with high pressure/temperature equilibrium apparatus. The experiments cover the temperature range of (313K?353K) and CO2 partial pressure range of (0.0207-18.67KPa) for AMP solutions. The experiments also present total pressure range (222.4-1001.9KPa) and (222.4-973.9KPa) for AMP and PZ systems at temperature range of (353-393K) respectively. A thermodynamic model representing the AMP system was developed using the e-NRTL framework. The binary interaction parameters (molecule-molecule) for AMP-H2O system were regressed using binary VLE data and excess enthalpy data from literature in NRTL equation. Then these binary interaction parameters were fixed and regressed the ternary interaction parameters using the VLE data and physical CO2 solubility data of this work.