High-pressure phase behavior of turmeric waste and extracts in the presence of carbon dioxide, ethanol and dimethylsulfoxide

• Published in: The Journal of supercritical fluids Vol. 124; pp. 38 - 49
• Main Authors: Santana, Ádina L., Debien, Isabel C.N., Meireles, M. Angela A.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-06-2017
• Subjects: Biowaste; Experimental equipment; Phase equilibrium data; Turmeric volatile oil; Biowaste; Turmeric volatile oil; Phase equilibrium data; Experimental equipment
• ISSN: 0896-8446; 1872-8162
• DOI: 10.1016/j.supflu.2017.01.006

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•A high-pressure phase equilibrium apparatus was built and validated.•Turmeric wastes are composed of carbohydrates and antioxidant substances.•Turmeric extracts and wastes exhibited complex phase behavior.
This work reports the validation of a phase equilibrium apparatus followed by the presentation of new high-pressure phase equilibrium data on systems containing turmeric waste and extracts, derived from processes that employs supercritical fluids and pressurized liquids, in the presence of carbon dioxide, ethanol and dimethylsulfoxide. In order to provide reliable information for further turmeric processing, experimental phase transition data were obtained using ten levels of temperature (303–348K) and pressures up to 23MPa. Results indicate the existence of complex phase behavior for the systems containing turmeric extracts and waste, with the occurrence of solid-vapor-liquid, solid-vapor-liquid-liquid, vapor–liquid, liquid–liquid and vapor–liquid–liquid phase transitions.