مسعود مفرحی

Diisopropanol amine is one of the important industrial solvents with various applications, which is the most applicable solvent for Carbon dioxide treating from natural gas in the Amine processes. Hence, vapor-liquid equilibrium calculations among the Carbon dioxide (CO2), Water (H2O) and Diisopropanol amine (DIPA) are became important, although high polar essense of the system substances makes the prediction of thermodynamic properties errorneous when rudimentary equation of states are utilized. In this thesis, ability of the CPA equation of state, which is the collation of SRK equation of state with SAFT theory, was evaluated. In this manner, several associating patterns for pure DIPA, water and DIPA two components system, CO2 and DIPA two components system, and water, CO2 and DIPA three components system were assessed and calculations error with experimental data were obtained. The outcomes revealed that 4C associating pattern produces the best results and the capability of CPA equation of state has been evaluated acceptable.