Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

In this work the solid-liquid equilibrium (SLE) of the ternary system 2-amino-2-methyl-propanol (AMP)-piperazine (PZ)-H2O and the aqueous binary system AMP were determined using a freezing point depression (FPD) setup and differential scanning calorimetry (DCS). A total of 59 new data points are listed in the full concentration range of 0 less than w(AMP) less than 100 % and 0 less than w(PZ) less than 61 %. The SLE phase boundary of AMP tetrahydrate (AMP*4H2O) was determined and confirmed by its crystal structure obtained from powder x-ray diffraction (PXRD). The new data of this work can be used in the creation of thermodynamic model for prevention of AMP and PZ precipitates from solvents used for CO2 capture. This gives a higher degree of safe operation. These data will allow for a deeper understanding molecular interaction and bond lengths in the AMP-water system which can be used for molecular simulation.