SOLUBILITY PREDICTION OF CO2 IN SEVERAL PHYSICAL LIQUID SOLVENTS USING CHEMCAD AND HYSYS SIMULATORS

Abstract

ABSTRACT:- CHEMCAD and HYSYS process simulators were used to analysis the literature experimental data and predict the solubility of CO2 in three physical solvents (sulfolane, propylene carbonate (PC), and n-methyl-2-pyrrolidone (NMP)) at different temperatures (298.15 , 313.15 , 323.15, and 373.15 K). Two thermodynamic models were used, the first using Peng-Robinson equation of state (PR-EOS) and the second using Soave-Redlich-Kwong equation of state (SRK-EOS). The solubility data of CO2 in all three physical solvents systems were correlated with CHEMCAD simulator using the SRK model without modification (kij = 0).The results showed a small deviation (less than 5%), but higher deviation (about 10%) was noticed only for CO2-NMP system at temperature 373 K. Whereas the results of PR model showed a high deviation (about 20%) with all the three physical solvents systems. Modifications performed by editing user defined binary interaction parameters (BIP) of the systems used, give good results for both simulators. Keywords:- Solubility prediction of CO2, Physical solvents, CHEMCAD and HYSYS Process Simulators, PR-EOS, SRK-EOS.