High Pressure Phase Behavior of CO₂ + N-Vinyl Caprolactam and CO₂ + N-Methyl Caprolactam Systems

抄録

Pressure - composition isotherms for binary mixtures of carbon dioxide (CO₂) + N-vinyl caprolactam (NVCL) and carbon dioxide (CO₂) + N-methyl caprolactam (NMCL) were measured using a variable volume view cell at temperature from 323 K to 353 K and pressure up to 21 MPa. Phase behavior of these binary experimental data was modeled with Peng-Robinson equation of state with two adjustable parameters. Critical constants were estimated with Joback method and acentric factor was estimated with Lee-Kesler method. Good correlation results were obtained.