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- Title
Evaluation of Ionic Liquids as In Situ Extraction Agents during the Alcoholic Fermentation of Carob Pod Extracts.
- Authors
Sanchez-Segado, Sergio; José Salar-García, María; Manuel Ortiz-Martínez, Víctor; Pérez de los Ríos, Antonia; José Hernández-Fernández, Francisco; Javier Lozano-Blanco, Luis
- Abstract
Anhydrous ethanol is apromising alternative to gasoline infuel engines. However, since ethanol forms an azeotrope with water, high-energy-consumption separation techniques such as azeotropic distillation, extractive distillation, and molecular sieves are needed to produce anhydrous ethanol. This work discusses the potential development of an integrated process for bioethanol production using ionic liquids and Ceratonia siliqua as a carbohydrate source for further fermentation of the aqueous extracts. A four-stage counter-current system was designed to improve the sugar extraction yield to values close to 99%. The alcoholic fermentation of the extracts showed ethanol concentrations of 95 g/L using the microorganism Saccharomyces cerevisae. The production of anhydrous ethanol through extractive distillation with ethylene glycol was simulated using CHEMCAD software, with an energy consumption of 13.23MJ/Kg of anhydrous ethanol. Finally, several ionic liquids were analyzed and are proposed as potential solvents for the recovery of bioethanol for the design of an integrated extraction-fermentation-separation process, according to their ability to extract ethanol from aqueous solutions and their biocompatibility with the microorganism used in this study.
- Subjects
FERMENTATION; IONIC liquids; AZEOTROPIC distillation; EXTRACTIVE distillation; CAROB; DISTILLATION; SUPERCRITICAL fluid extraction; ETHYLENE glycol
- Publication
Fermentation (Basel), 2019, Vol 5, Issue 4, p1
- ISSN
2311-5637
- Publication type
Article
- DOI
10.3390/fermentation5040090