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Jason Yi Juang Yeo,Felycia Edi Soetaredjo,Suryadi Ismadji,Jaka Sunarso 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-
Supercritical carbon dioxide (SC-CO2) represents a promising solvent in the synthesis of biodiesel givenits enhanced mass transfer properties as well as its high affinity to the fatty acids. In this work, the phaseequilibria data of 5 major fatty acids: palmitic, stearic, oleic, linoleic, and linolenic acid in SC-CO2 werestudied experimentally at temperature between 343.15 to 373.15 K and pressures between 8 to 24 MPa. The experimental data were correlated using Peng–Robinson Equation of State with van der Waals(PR-vdW), Panagiotopoulos-Reid (PR-PR), and Stryjek-Vera (PR-SV) combining rules. Thefitting result byPR-PR was shown to be more accurate and consistent than those of PR-vdW and PR-SV. From these data,we found that oleic acid has the greatest solubility in SC-CO2, followed by linoleic acid, palmitic acid,stearic acid, and lastly, linolenic acid.