Solubility of CO2 in 0.1M, 1M and 3M of 2-amino-2-methyl-1-propanol (AMP) from 313 to 393K and model representation using the eNRTL framework

Abstract This paper presents an experimental and modeling study of the systems pure AMP, AMP/H2O and AMP/CO2/H2O. All available data in the literature is collected and new experimental data for the ternary AMP/CO2/H2O system are presented. Modeling was performed using an Antoine model for the pure component VLE and an NRTL model for the binary AMP/H2O system. The parameters in the two model were fitted together in a combined fit yielding a pure component representation with an AARD of 1.4% for saturation pressure and of 2.6% for vapor-phase mole fraction of all binary data. The individual fits to the various data sets used are also given. For the ternary AMP/CO2/H2O system an e-NRTL model was fitted to the combined sets of new and literature VLE data. The model representation of all ternary data was with an AARD of 23.5% for the CO2 partial pressure data, 21.5% for the total pressure data and 4.7% for the Henry's constant data. The model covers a range of AMP concentrations from 0.9 to 56 mass %, temperatures from 298 to 393K and CO2 loadings from 0 to about 2. The model is also shown to give good representation of speciation and a reasonable representation of heat of absorption data found in the literature.