High-pressure (vapour + liquid) equilibria for ternary systems composed by {(E)-2-hexenal or hexanal + carbon dioxide + water}: Partition coefficient measurement |
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| Institution: | 1. Departamento de Ingeniería Química y Bioprocesos, Pontificia Universidad Católica de Chile, Avda. Vicuña Mackenna 4860, Macul, Santiago, Chile;2. Departamento de Ingeniería Química y Ambiental, Universidad Técnica Federico Santa María, Avda. España 1680, Valparaíso, Chile;3. Centro Regional de Estudios en Alimentos Saludables CREAS, Blanco 1623, Valparaíso, Chile;1. Department of Urology, Canakkale Onsekiz Mart University, Faculty of Medicine, Canakkale, Turquía;2. Department of Urology, Medeniyet University, Faculty of Medicine, Estambul, Turquía;3. Department of Urology, Bezmialem Vakif University, Faculty of Medicine, Estambul, Turquía;4. Kecioren Training and Research Hospital, Department of Urology, Estambul, Turquía;5. Department of Biostatistics, Ankara University, Faculty of Medicine, Ankara, Turquía;6. Department of Radiology, Canakkale Onsekiz Mart University, Faculty of Medicine, Canakkale, Turquía;7. Department of Urology, Gazi University, Faculty of Medicine, Ankara, Turquía;1. Department of Earth Sciences, University of Zaragoza, c/ Pedro Cerbuna 12, 50009 Zaragoza, Spain;2. GHS, Institute of Environmental Assessment & Water Research (IDAEA), CSIC, Jordi Girona 18-26, 08034 Barcelona, Spain;1. School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China;2. Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100193, China;1. College of Marine Life Science, Ocean University of China, Qingdao 266003, China;2. College of Fisheries, Ocean University of China, Qingdao 266003, China;1. School of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, Manchester M13 9PL, UK;2. School of Materials, The University of Manchester, Oxford Road, Manchester M13 9PL, UK;3. Chemistry Department, Faculty of Science, Ain Shams University, Abbassia, Cairo 11566, Egypt;4. Water Pollution Research Department, National Research Centre, 33 EL Bohouth St. (former EL Tahrir St.), P.O. 12622, Dokki, Giza, Egypt;1. Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000, Strasbourg, France;2. ADEME, 20 Avenue du Grésillé, 49004, Angers, Cédex 01, France |
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| Abstract: | A new apparatus based on a static–analytic method assembled in this work was utilised to perform high-pressure (vapour + liquid) equilibria measurements of aqueous ternary systems. This work includes values of isothermal partition coefficients between CO2 and water of two apple aroma constituents, (E)-2-hexenal and hexanal. Additionally, this work reports new experimental (vapour + liquid) equilibria measurements for the ternary systems (CO2 + (E)-2-hexenal + water) and (CO2 + hexanal + water), at fixed liquid phase composition (600 mg · kg−1), at temperatures of (313, 323 and 333) K and at pressures from (8 to 19) MPa. Vapour liquid interphase was checked and monitored visually for all the systems studied in this work. No liquid immiscibility was observed at the composition, temperatures and pressures studied. In order to suggest reasonable operation conditions for fractionation of aromas with dense carbon dioxide, partition coefficients of the aroma compounds between CO2 and water along with their separation factors from water were calculated. Partition coefficients of (E)-2-hexenal between CO2 and water were in the range of (6 to 91) and where found to be near six times higher than those of hexanal (9 to 17). Very high separation factors from water were observed (∼104) especially for (E)-2-hexenal. The highest separation factor, for both compounds, was found at a temperature of 313 K and pressures from (12 to 14) MPa. |
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| Keywords: | Apple aroma Carbon dioxide Experimental data Fruit essences Hexanal Partition coefficient Supercritical fluid fractionation |
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