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

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 apparent Henry's law 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. •New 160 ternary VLE data of AMP/CO2/H2O are provided.•AMP is important solvent in CCS, particularly in blends.•All available data are collected and used in an eNRTL model.•Fitted parameters are tabulated for general use.•The model covers up to: 56 mass % AMP, 2 mol CO2/AMP and 393K.