| 초록 |
The two-component mixtures for the 1-butyl-2-pyrrolidone and 1-octyl-2-pyrrolidone in CO2 at 313.2, 333.2, 353.2, 373.2 and 393.2 K and pressures up to 30 MPa have been investigated using high pressure view cell by static-type. The (CO2 + 1-butyl-2-pyrrolidone) and (CO2 + 1-octyl-2-pyrrolidone) systems exhibit fundamentally type-1 region. The product results for the (CO2 + 1-butyl-2-pyrrolidone) and (CO2 + 1-octyl-2-pyrrolidone) systems correlate with the Peng-Robinson equation of state using a mixing rule including two adjustable parameters. The critical properties of 1-butyl-2-pyrrolidone and 1-octyl-2-pyrrolidone were predicted with the Joback – Lyderson group contribution and Lee-Kesler method. RMSD for the (CO2 + 1-butyl-2-pyrrolidone) [kij=0.032, ηij=-0.015] and (CO2 + 1-octyl-2-pyrrolidone) [kij=0.0, ηij=0.0] systems using two parameters determined at 353.2 K were 5.83% and 3.64%, respectively. Particularly, RMSD for the (CO2 + 1-butyl-2-pyrrolidone) system by optimized interaction parameters at each temperature was 1.87%. |
