Purification of Methyl Acetate/Water Mixtures from Chemical Interesterification of Vegetable Oils by Pervaporation

Biodiesel production through chemical interesterification of triglycerides requires an excess of methyl acetate that must be recovered once the reaction is finished and the catalyst is neutralized. The present study concerns with the purification of methyl acetate by pervaporation. PERVAP 2201 was c...

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Detalles Bibliográficos
Autores: Casas, Abraham, Pérez Martínez, Angel, Ramos Marcos, María Jesús
Tipo de recurso: artículo
Fecha de publicación:2021
País:España
Institución:Universidad de Castilla-La Mancha
Repositorio:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/30002
Acceso en línea:http://hdl.handle.net/10578/30002
Access Level:acceso abierto
Palabra clave:Methyl acetate
Interesterification
Membrane
Acetato de metilo
Interesterificación
Membrana
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spelling Purification of Methyl Acetate/Water Mixtures from Chemical Interesterification of Vegetable Oils by PervaporationCasas, AbrahamPérez Martínez, AngelRamos Marcos, María JesúsMethyl acetateInteresterificationMembraneAcetato de metiloInteresterificaciónMembranaBiodiesel production through chemical interesterification of triglycerides requires an excess of methyl acetate that must be recovered once the reaction is finished and the catalyst is neutralized. The present study concerns with the purification of methyl acetate by pervaporation. PERVAP 2201 was chosen as pervaporation membrane due to its high hydrophilic character that makes it suitable for the elimination of water in methyl acetate. Runs were started from concentrations in the feed of 2–8 wt.% of water and working temperatures close to the boiling point of methyl acetate (50, 60, and 70 °C), to get the main design parameters, i.e., permeate flux and selectivity. High temperature favored the permeate flux without compromising the selectivity. However, the flux declines significantly when water contained in the feed is below 2 wt.%. This implies that pervaporation should be used, only to decrease the water content to a value lower than in the azeotrope (2.3% by weight). A solution-diffusion model relating the flux of the permeating compound with the activity of the compound in the feed and the operating temperature has been proposed. The model obtained can be used in the design of the pervaporation stage, thus allowing to know the permeate flux for the different operating conditions.La producción de biodiésel mediante interesterificación química de triglicéridos requiere un exceso de acetato de metilo que debe recuperarse una vez finalizada la reacción y neutralizado el catalizador. El presente estudio se refiere a la purificación de acetato de metilo por pervaporación. Se eligió PERVAP 2201 como membrana de pervaporación debido a su alto carácter hidrofílico que la hace adecuada para la eliminación de agua en acetato de metilo. Los ensayos se iniciaron a partir de concentraciones en la alimentación de 2 a 8 % en peso de agua y temperaturas de trabajo cercanas al punto de ebullición del acetato de metilo (50, 60 y 70 °C), para obtener los principales parámetros de diseño, es decir, el flujo de permeado y selectividad. La alta temperatura favoreció el flujo de permeado sin comprometer la selectividad. Sin embargo, el flujo disminuye significativamente cuando el agua contenida en la alimentación está por debajo del 2% en peso. Esto implica que se debe utilizar la pervaporación, solo para disminuir el contenido de agua a un valor inferior al del azeótropo (2,3% en peso). Se ha propuesto un modelo de solución-difusión que relaciona el flujo del compuesto permeante con la actividad del compuesto en la alimentación y la temperatura de operación. El modelo obtenido puede ser utilizado en el diseño de la etapa de pervaporación, permitiendo así conocer el flujo de permeado para las diferentes condiciones de operación.MDPI202220222021info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/10578/30002reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/300022026-05-27T07:36:41Z
dc.title.none.fl_str_mv Purification of Methyl Acetate/Water Mixtures from Chemical Interesterification of Vegetable Oils by Pervaporation
title Purification of Methyl Acetate/Water Mixtures from Chemical Interesterification of Vegetable Oils by Pervaporation
spellingShingle Purification of Methyl Acetate/Water Mixtures from Chemical Interesterification of Vegetable Oils by Pervaporation
Casas, Abraham
Methyl acetate
Interesterification
Membrane
Acetato de metilo
Interesterificación
Membrana
title_short Purification of Methyl Acetate/Water Mixtures from Chemical Interesterification of Vegetable Oils by Pervaporation
title_full Purification of Methyl Acetate/Water Mixtures from Chemical Interesterification of Vegetable Oils by Pervaporation
title_fullStr Purification of Methyl Acetate/Water Mixtures from Chemical Interesterification of Vegetable Oils by Pervaporation
title_full_unstemmed Purification of Methyl Acetate/Water Mixtures from Chemical Interesterification of Vegetable Oils by Pervaporation
title_sort Purification of Methyl Acetate/Water Mixtures from Chemical Interesterification of Vegetable Oils by Pervaporation
dc.creator.none.fl_str_mv Casas, Abraham
Pérez Martínez, Angel
Ramos Marcos, María Jesús
author Casas, Abraham
author_facet Casas, Abraham
Pérez Martínez, Angel
Ramos Marcos, María Jesús
author_role author
author2 Pérez Martínez, Angel
Ramos Marcos, María Jesús
author2_role author
author
dc.subject.none.fl_str_mv Methyl acetate
Interesterification
Membrane
Acetato de metilo
Interesterificación
Membrana
topic Methyl acetate
Interesterification
Membrane
Acetato de metilo
Interesterificación
Membrana
description Biodiesel production through chemical interesterification of triglycerides requires an excess of methyl acetate that must be recovered once the reaction is finished and the catalyst is neutralized. The present study concerns with the purification of methyl acetate by pervaporation. PERVAP 2201 was chosen as pervaporation membrane due to its high hydrophilic character that makes it suitable for the elimination of water in methyl acetate. Runs were started from concentrations in the feed of 2–8 wt.% of water and working temperatures close to the boiling point of methyl acetate (50, 60, and 70 °C), to get the main design parameters, i.e., permeate flux and selectivity. High temperature favored the permeate flux without compromising the selectivity. However, the flux declines significantly when water contained in the feed is below 2 wt.%. This implies that pervaporation should be used, only to decrease the water content to a value lower than in the azeotrope (2.3% by weight). A solution-diffusion model relating the flux of the permeating compound with the activity of the compound in the feed and the operating temperature has been proposed. The model obtained can be used in the design of the pervaporation stage, thus allowing to know the permeate flux for the different operating conditions.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10578/30002
url http://hdl.handle.net/10578/30002
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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