Catalytic performance of bulk and Al2O3-supported molybdenum oxide for the production of biodiesel from oil with high free fatty acids content

Non-edible vegetable oils are characterized by high contents of free fatty acids (FFAs) that prevent from using the conventional basic catalysts for the production of biodiesel. In this work, solid acid catalysts are used for the simultaneous esterification and transesterification with methanol of t...

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Autores: Navajas, Alberto, Reyero, Inés, Jiménez Barrera, Elena Mª, Romero Sarria, Francisca, Llorca, Jordi, Gandía, Luis M.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2020
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/98110
Acceso en línea:https://hdl.handle.net/11441/98110
https://doi.org/10.3390/catal10020158
Access Level:acceso abierto
Palabra clave:Acid catalysis
Biodiesel
Biofuel
Esterification
Fatty acid
Methanolysis
Molybdenum oxide
Transesterification
Vegetable oil
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spelling Catalytic performance of bulk and Al2O3-supported molybdenum oxide for the production of biodiesel from oil with high free fatty acids contentNavajas, AlbertoReyero, InésJiménez Barrera, Elena MªRomero Sarria, FranciscaLlorca, JordiGandía, Luis M.Acid catalysisBiodieselBiofuelEsterificationFatty acidMethanolysisMolybdenum oxideTransesterificationVegetable oilNon-edible vegetable oils are characterized by high contents of free fatty acids (FFAs) that prevent from using the conventional basic catalysts for the production of biodiesel. In this work, solid acid catalysts are used for the simultaneous esterification and transesterification with methanol of the FFAs and triglycerides contained in sunflower oil acidified with oleic acid. Molybdenum oxide (MoO3), which has been seldom considered as a catalyst for the production of biodiesel, was used in bulk and alumina-supported forms. Results showed that bulk MoO3 is very active for both transesterification and esterification reactions, but it suffered from severe molybdenum leaching in the reaction medium. When supported on Al2O3, the MoO3 performance improved in terms of active phase utilization and stability though molybdenum leaching remained significant. The improvement of catalytic performance was ascribed to the establishment of MoO3Al2O3 interactions that favored the anchorage of molybdenum to the support and the formation of new strong acidic centers, although this effect was offset by a decrease of specific surface area. It is concluded that the development of stable catalysts based on MoO3 offers an attractive route for the valorization of oils with high FFAs content.Ministerio de Ciencia, Innovación y Universidades RTI2018-096294-B-C31Multidisciplinary Digital Publishing Institute (MDPI)Química Inorgánica2020info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/98110https://doi.org/10.3390/catal10020158reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésCatalysts, 10 (2), 158.RTI2018-096294-B-C31https://doi.org/10.3390/catal10020158info:eu-repo/semantics/openAccessoai:idus.us.es:11441/981102026-06-17T12:51:07Z
dc.title.none.fl_str_mv Catalytic performance of bulk and Al2O3-supported molybdenum oxide for the production of biodiesel from oil with high free fatty acids content
title Catalytic performance of bulk and Al2O3-supported molybdenum oxide for the production of biodiesel from oil with high free fatty acids content
spellingShingle Catalytic performance of bulk and Al2O3-supported molybdenum oxide for the production of biodiesel from oil with high free fatty acids content
Navajas, Alberto
Acid catalysis
Biodiesel
Biofuel
Esterification
Fatty acid
Methanolysis
Molybdenum oxide
Transesterification
Vegetable oil
title_short Catalytic performance of bulk and Al2O3-supported molybdenum oxide for the production of biodiesel from oil with high free fatty acids content
title_full Catalytic performance of bulk and Al2O3-supported molybdenum oxide for the production of biodiesel from oil with high free fatty acids content
title_fullStr Catalytic performance of bulk and Al2O3-supported molybdenum oxide for the production of biodiesel from oil with high free fatty acids content
title_full_unstemmed Catalytic performance of bulk and Al2O3-supported molybdenum oxide for the production of biodiesel from oil with high free fatty acids content
title_sort Catalytic performance of bulk and Al2O3-supported molybdenum oxide for the production of biodiesel from oil with high free fatty acids content
dc.creator.none.fl_str_mv Navajas, Alberto
Reyero, Inés
Jiménez Barrera, Elena Mª
Romero Sarria, Francisca
Llorca, Jordi
Gandía, Luis M.
author Navajas, Alberto
author_facet Navajas, Alberto
Reyero, Inés
Jiménez Barrera, Elena Mª
Romero Sarria, Francisca
Llorca, Jordi
Gandía, Luis M.
author_role author
author2 Reyero, Inés
Jiménez Barrera, Elena Mª
Romero Sarria, Francisca
Llorca, Jordi
Gandía, Luis M.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Química Inorgánica
dc.subject.none.fl_str_mv Acid catalysis
Biodiesel
Biofuel
Esterification
Fatty acid
Methanolysis
Molybdenum oxide
Transesterification
Vegetable oil
topic Acid catalysis
Biodiesel
Biofuel
Esterification
Fatty acid
Methanolysis
Molybdenum oxide
Transesterification
Vegetable oil
description Non-edible vegetable oils are characterized by high contents of free fatty acids (FFAs) that prevent from using the conventional basic catalysts for the production of biodiesel. In this work, solid acid catalysts are used for the simultaneous esterification and transesterification with methanol of the FFAs and triglycerides contained in sunflower oil acidified with oleic acid. Molybdenum oxide (MoO3), which has been seldom considered as a catalyst for the production of biodiesel, was used in bulk and alumina-supported forms. Results showed that bulk MoO3 is very active for both transesterification and esterification reactions, but it suffered from severe molybdenum leaching in the reaction medium. When supported on Al2O3, the MoO3 performance improved in terms of active phase utilization and stability though molybdenum leaching remained significant. The improvement of catalytic performance was ascribed to the establishment of MoO3Al2O3 interactions that favored the anchorage of molybdenum to the support and the formation of new strong acidic centers, although this effect was offset by a decrease of specific surface area. It is concluded that the development of stable catalysts based on MoO3 offers an attractive route for the valorization of oils with high FFAs content.
publishDate 2020
dc.date.none.fl_str_mv 2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/98110
https://doi.org/10.3390/catal10020158
url https://hdl.handle.net/11441/98110
https://doi.org/10.3390/catal10020158
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Catalysts, 10 (2), 158.
RTI2018-096294-B-C31
https://doi.org/10.3390/catal10020158
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 Multidisciplinary Digital Publishing Institute (MDPI)
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute (MDPI)
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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