Activated bentonite nanocomposite for the synthesis of solketal from glycerol in the liquid phase
- Autores
- Pérez, Federico Martín; Legarto, María Celeste; Lombardi, María Bárbara; Santori, Gerardo Fabián; Pompeo, Francisco; Nichio, Nora Nancy
- Año de publicación
- 2022
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Activated bentonites are low-cost acid catalysts used in several reactions. However, their application at an industrial scale is affected by the formation of colloidal suspensions when these bentonites are in aqueous solutions. In order to overcome these limitations, this work proposes obtaining a catalyst based on a composite containing natural bentonite within a silica–resin structure, which allows separating and re-utilizing the catalyst more easily and without centrifugal filtration requirements. By means of characterization techniques, the present study determined that the activated bentonite composite presented a total specific surface area of ~360 m² g⁻¹, ~4 mmol of acid sites per gram of bentonite, and sites with strong acid strength, all of which bestowed activity and selectivity in the solketal synthesis reaction from glycerol and acetone, reaching equilibrium conversion within a short reaction time. Furthermore, the present work developed a Langmuir– Hinshelwood–Hougen–Watson kinetic model, achieving an activation energy of 50.3 x 3.6 kJ mol⁻¹ and a pre-exponential factor of 6.4 x 106 mol g ⁻¹ L⁻¹ s⁻¹, which are necessary for reactor design.
Centro de Investigación y Desarrollo en Ciencias Aplicadas
Facultad de Ingeniería
Centro de Tecnología de Recursos Minerales y Cerámica - Materia
-
Química
Glycerol ketalization
Solketal
Bentonite nanocomposites
Acid activation
Kinetic model - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/154236
Ver los metadatos del registro completo
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Activated bentonite nanocomposite for the synthesis of solketal from glycerol in the liquid phasePérez, Federico MartínLegarto, María CelesteLombardi, María BárbaraSantori, Gerardo FabiánPompeo, FranciscoNichio, Nora NancyQuímicaGlycerol ketalizationSolketalBentonite nanocompositesAcid activationKinetic modelActivated bentonites are low-cost acid catalysts used in several reactions. However, their application at an industrial scale is affected by the formation of colloidal suspensions when these bentonites are in aqueous solutions. In order to overcome these limitations, this work proposes obtaining a catalyst based on a composite containing natural bentonite within a silica–resin structure, which allows separating and re-utilizing the catalyst more easily and without centrifugal filtration requirements. By means of characterization techniques, the present study determined that the activated bentonite composite presented a total specific surface area of ~360 m² g⁻¹, ~4 mmol of acid sites per gram of bentonite, and sites with strong acid strength, all of which bestowed activity and selectivity in the solketal synthesis reaction from glycerol and acetone, reaching equilibrium conversion within a short reaction time. Furthermore, the present work developed a Langmuir– Hinshelwood–Hougen–Watson kinetic model, achieving an activation energy of 50.3 x 3.6 kJ mol⁻¹ and a pre-exponential factor of 6.4 x 106 mol g ⁻¹ L⁻¹ s⁻¹, which are necessary for reactor design.Centro de Investigación y Desarrollo en Ciencias AplicadasFacultad de IngenieríaCentro de Tecnología de Recursos Minerales y Cerámica2022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/154236enginfo:eu-repo/semantics/altIdentifier/issn/2073-4344info:eu-repo/semantics/altIdentifier/doi/10.3390/ catal12060673info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:39:57Zoai:sedici.unlp.edu.ar:10915/154236Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:39:57.796SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Activated bentonite nanocomposite for the synthesis of solketal from glycerol in the liquid phase |
| title |
Activated bentonite nanocomposite for the synthesis of solketal from glycerol in the liquid phase |
| spellingShingle |
Activated bentonite nanocomposite for the synthesis of solketal from glycerol in the liquid phase Pérez, Federico Martín Química Glycerol ketalization Solketal Bentonite nanocomposites Acid activation Kinetic model |
| title_short |
Activated bentonite nanocomposite for the synthesis of solketal from glycerol in the liquid phase |
| title_full |
Activated bentonite nanocomposite for the synthesis of solketal from glycerol in the liquid phase |
| title_fullStr |
Activated bentonite nanocomposite for the synthesis of solketal from glycerol in the liquid phase |
| title_full_unstemmed |
Activated bentonite nanocomposite for the synthesis of solketal from glycerol in the liquid phase |
| title_sort |
Activated bentonite nanocomposite for the synthesis of solketal from glycerol in the liquid phase |
| dc.creator.none.fl_str_mv |
Pérez, Federico Martín Legarto, María Celeste Lombardi, María Bárbara Santori, Gerardo Fabián Pompeo, Francisco Nichio, Nora Nancy |
| author |
Pérez, Federico Martín |
| author_facet |
Pérez, Federico Martín Legarto, María Celeste Lombardi, María Bárbara Santori, Gerardo Fabián Pompeo, Francisco Nichio, Nora Nancy |
| author_role |
author |
| author2 |
Legarto, María Celeste Lombardi, María Bárbara Santori, Gerardo Fabián Pompeo, Francisco Nichio, Nora Nancy |
| author2_role |
author author author author author |
| dc.subject.none.fl_str_mv |
Química Glycerol ketalization Solketal Bentonite nanocomposites Acid activation Kinetic model |
| topic |
Química Glycerol ketalization Solketal Bentonite nanocomposites Acid activation Kinetic model |
| dc.description.none.fl_txt_mv |
Activated bentonites are low-cost acid catalysts used in several reactions. However, their application at an industrial scale is affected by the formation of colloidal suspensions when these bentonites are in aqueous solutions. In order to overcome these limitations, this work proposes obtaining a catalyst based on a composite containing natural bentonite within a silica–resin structure, which allows separating and re-utilizing the catalyst more easily and without centrifugal filtration requirements. By means of characterization techniques, the present study determined that the activated bentonite composite presented a total specific surface area of ~360 m² g⁻¹, ~4 mmol of acid sites per gram of bentonite, and sites with strong acid strength, all of which bestowed activity and selectivity in the solketal synthesis reaction from glycerol and acetone, reaching equilibrium conversion within a short reaction time. Furthermore, the present work developed a Langmuir– Hinshelwood–Hougen–Watson kinetic model, achieving an activation energy of 50.3 x 3.6 kJ mol⁻¹ and a pre-exponential factor of 6.4 x 106 mol g ⁻¹ L⁻¹ s⁻¹, which are necessary for reactor design. Centro de Investigación y Desarrollo en Ciencias Aplicadas Facultad de Ingeniería Centro de Tecnología de Recursos Minerales y Cerámica |
| description |
Activated bentonites are low-cost acid catalysts used in several reactions. However, their application at an industrial scale is affected by the formation of colloidal suspensions when these bentonites are in aqueous solutions. In order to overcome these limitations, this work proposes obtaining a catalyst based on a composite containing natural bentonite within a silica–resin structure, which allows separating and re-utilizing the catalyst more easily and without centrifugal filtration requirements. By means of characterization techniques, the present study determined that the activated bentonite composite presented a total specific surface area of ~360 m² g⁻¹, ~4 mmol of acid sites per gram of bentonite, and sites with strong acid strength, all of which bestowed activity and selectivity in the solketal synthesis reaction from glycerol and acetone, reaching equilibrium conversion within a short reaction time. Furthermore, the present work developed a Langmuir– Hinshelwood–Hougen–Watson kinetic model, achieving an activation energy of 50.3 x 3.6 kJ mol⁻¹ and a pre-exponential factor of 6.4 x 106 mol g ⁻¹ L⁻¹ s⁻¹, which are necessary for reactor design. |
| publishDate |
2022 |
| dc.date.none.fl_str_mv |
2022 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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http://sedici.unlp.edu.ar/handle/10915/154236 |
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eng |
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eng |
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