High-pressure phase behavior of tri-ethylene glycol dimethacrylate and tetra-ethylene glycol dimethacrylate in supercritical carbon dioxide

• Published in: Fluid phase equilibria 2012-04, Vol.319, p.37-41
• Main Authors: Cho, Dong Woo, Shin, Jungin, Bae, Won, Kim, Hwayong, Lee, Ju Ho, Shin, Moon Sam
• Format: Article
• Language: English
• Subjects: Chemistry; Exact sciences and technology; General and physical chemistry; High-pressure phase behavior; Phase equilibria; Supercritical CO2; T3EGDMA; T4EGDMA; Tetra-ethylene glycol dimethacrylate; Tri-ethylene glycol dimethacrylate; Variable volume view cell
• ISSN: 0378-3812; 1879-0224
• DOI: 10.1016/j.fluid.2011.12.011

[Display omitted] ► High pressure phase behavior of T3EGDMA and T4EGDMA in scCO2 was measured. ► The experimental data correlation was performed using the PR-EOS. ► Tc and Pc were estimated using the several group contribution methods. ► The acentric factor was estimated using Lee–Kesler method. ► The Joback method and Lee–Kesler method shows the best correlation result. In this study, high-pressure phase behavior data, the pressure-composition (P-x) isotherms for the CO2+T3EGDMA and CO2+T4EGDMA binary mixture system, were measured using the static method with a variable-volume view cell at temperatures ranging from 313.2 to 363.2K. The experimental data correlation was performed using the Peng–Robinson Equation of State (PR-EOS) and the van der Waals one-fluid mixing rule. The critical constants for the PR-EOS were estimated using the several group contributions. The acentric factor was estimated using the Lee–Kesler method. The Joback method shows the better correlation results than the others.