Abstract
The thermodynamic equilibrium properties of two components, namely, N,N-dimethylaniline (NNDM) and N,N-diethylaniline (NNDE), in supercritical carbon dioxide (S-CO2) were reported. Data determinations were performed through the static-type method from 313.2 to 393.2 K and 4.70 to 24.90 MPa. The results obtained indicated that the solubility of CO2 increased monotonically with the increase in system temperature and mole fraction of NNDM and NNDE in binary (solute + solvent) mixtures. The solubility curve of NNDM and NNDE in the S-CO2 + NNDM and S-CO2 + NNDE system increased with respect to the increasing temperature at a constant pressure. The S-CO2 + NNDM and S-CO2 + NNDE models corresponded to type-I phase behavior. Moreover, laboratory results of both systems were adequately correlated with the Peng-Robinson equation of state. The rmsd (%) of S-CO2 + NNDM [kij = 0.075, ηij = −0.070] and S-CO2 + NNDE [kij = 0.078, ηij = −0.070] models working with two factors established at 353.2 K were noted as 7.50% and 7.08%, respectively.
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