Solubilities and partial molar volumes of new CO2-philic propane derivatives in supercritical carbon dioxide

• Three new CO2-philic propane derivatives were designed and synthesized.
• The tested solubility data were calculated and correlated with three models.
• Best agreement was obtained with JCF model between the tested and calculated data.
• Symmetry influence of compound structure on solubility in scCO2 has been discussed.
• The partial molar volumes V¯2 for three compounds were estimated.

Three new potent CO2-philic propane derivatives were designed and synthesized. Their structures were characterized by NMR, FTIR, and elemental analysis. Phase behavior of the three compounds was investigated at T = (313, 323, 333, 343 or 353) K and pressures from (7.7 to 12.1) MPa in supercritical carbon dioxide. The measured solubility data were correlated using three models: Chrastil, Sung and Shim (SS), and Jouyban–Chan–Foster (JCF) semi-empirical models, and satisfied agreements were obtained. Solubility data were also utilized to estimate the partial molar volume V¯2 for each compound in the supercritical phase using the theory developed by Kumar and Johnston.

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