| 초록 |
Vapor + liquid phase behavior for the binary (CO2 + vinyl octanoate) and (CO2 + vinyl pivalate) systems at various temperatures from (313.2 K to 393.2 K) and pressures up to 21 MPa have been investigated by static-type at high pressure. The solubility curve of carbon dioxide in the (CO2 + vinyl octanoate) and (CO2 + vinyl pivalate) systems decrease as the temperature increases at a constant pressure. The (CO2 + vinyl octanoate) and (CO2 + vinyl pivalate) systems correlate with the Peng-Robinson equation of state including two (kij, ηij) adjustable parameters. The critical properties of vinyl octanoate and vinyl pivalate were predicted with the Joback-Lyderson group contribution and Lee-Kesler method. RMSD for the (CO2 + vinyl octanoate) [kij=0.065, ηij=-0.015] and (CO2 + vinyl pivalate) [kij=0.065, ηij=-0.012] systems using two parameters determined at 353.2 K were 5.89 % and 5.76 %, respectively. RMSD for the (CO2 + vinyl octanoate) and (CO2 + vinyl pivalate) systems by two adjustable parameters determined at each temperature were 3.73 % and 3.77 %, respectively. |
