High-Pressure Phase Behavior of CO2 + N-Vinyl Caprolactam and CO2 + N-Methyl Caprolactam Systems
- Soyoung Kwon
- ,
- Won Bae
- , and
- Hwayong Kim
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School of Chemical Engineering and Institute of Chemical Processes, Seoul National University, San 56-1, Shilim-dong, Gwanak-Gu, Seoul, 151-744, Korea
Abstract
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 (323.15 to 353.15) K and pressure up to about 21 MPa. Phase behavior of these binary experimental data were correlated with Peng−Robinson equation of state using a van der Waals one-fluid mixing rule including two adjustable parameters. Critical constants were estimated with the Joback method, and the acentric factor was estimated with the Lee−Kesler method.
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