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oai:uvadoc.uva.es:10324/460432026-03-05T13:48:14Zcom_10324_31661com_10324_952com_10324_894col_10324_31662

Tita, Gerardo Joaquín Navarrete, Alexander Martín Martínez, Ángel Cocero Alonso, María José 2021-04-07T09:29:33Z 2021-04-07T09:29:33Z 2021 Journal of Supercritical Fluids, 2021, vol. 167, p. 105046 0896-8446 http://uvadoc.uva.es/handle/10324/46043 10.1016/j.supflu.2020.105046 105046 The Journal of Supercritical Fluids 167 Residues of the tobacco industry are a source of valuable compounds such as solanesol and nicotine. In this work, the supercritical fluid extraction of these compounds from tobacco scrap was studied. The effect of the key process parameters (pressure, temperature, extraction time) was analyzed and a phenomenological model of the extraction was applied in order to derive solubility and mass transfer coefficients. Furthermore, solanesol and nicotine obtained by supercritical extraction were fractionated by means of a liquid-liquid extraction. Results show that different conditions are required depending on the purpose of the extraction: low pressure (15 MPa) in order to enhance solanesol yield and solanesol selectivity, and high pressure (37 MPa) to promote nicotine extraction, while model results indicate that the best results were obtained in conditions in which the extraction was controlled by the solubility parameters. These results provide indications for the valorization of residues produced by the tobacco industry. eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ © 2021 Elsevier Attribution-NonCommercial-NoDerivatives 4.0 Internacional Model assisted supercritical fluid extraction and fractionation of added-value products from tobacco scrap info:eu-repo/semantics/article