Oxidación parcial de glicerol sobre catalizadores de Cu-Co soportados en metacaolinita dealuminizada
| dc.contributor.advisor | Velásquez Márquez, León Mauricio | |
| dc.contributor.advisor | Carriazo Baños, José Gregorio | |
| dc.contributor.author | Paredes Quevedo, Laura Camila | |
| dc.contributor.researchgroup | Estado Sólido y Catálisis Ambiental | spa |
| dc.date.accessioned | 2021-08-04T23:59:40Z | |
| dc.date.available | 2021-08-04T23:59:40Z | |
| dc.date.issued | 2021-07-30 | |
| dc.description | ilustraciones, tablas | spa |
| dc.description.abstract | Este trabajo centra su atención en la valorización catalítica de glicerol mediante su transformación en productos de mayor valor comercial. Para alcanzar este objetivo se estudió la reacción de oxidación de glicerol en medio acuoso, ya que la vía oxidativa es una de más promisorias respecto a otro tipo de reacciones. Se sintetizaron catalizadores soportados basados en óxidos mixtos de Cu y Co (espinela CuCo2O4) por medio del método de impregnación húmeda, se utilizó como soporte una metacaolinita dealuminizada, un sólido que se obtiene del tratamiento térmico y ácido a la caolinita natural colombiana, con el fin de generar elevada micro y mesoporosidad. Mediante la aplicación de diferentes técnicas de caracterización se confirma la síntesis exitosa de la espinela CuCo2O4 y la obtención de sólidos con elevada área superficial y dispersión de la fase metálica gracias al tratamiento realizado al soporte. La estrategia experimental se enfocó en el estudio de parámetros como la optimización de temperatura, concentración de peróxido de hidrógeno y tiempo de reacción. Posteriormente se verificó el efecto cooperativo que existe entre el Cu y Co, se evaluaron diferentes cargas de fase metálica sobre el soporte y la estabilidad del mejor catalizador a través de la aplicación de cinco ciclos de reacción. En general, estos materiales demostraron ser catalíticamente activos y selectivos en la oxidación de glicerol. Se observaron 5 productos de reacción, entre ellos la dihidroxiacetona (producto mayoritario), ácido glicérico, gliceraldehído, ácido hidroxipirúvico y ácido mesoxálico. Finalmente, estos catalizadores exhibieron actividad catalítica favorable a condiciones suaves de reacción (80 °C y presión atmosférica). (Texto tomado de la fuente) | spa |
| dc.description.abstract | This work focuses on glycerol catalytic valorization through its transformation into added value products. To achieve this objective, the oxidation reaction of glycerol in aqueous media was studied, the oxidative pathway is one of the most promising compared to other types of reactions. Supported catalysts were synthesized based on mixed oxides of Cu and Co (CuCo2O4 spinel) by the wet impregnation method, a dealuminated metakaolinite was used as support, a solid that is obtained by thermic and acid treatment to enhance micro and mesoporosity. Through the application of different characterization techniques, the successful synthesis of the CuCo2O4 spinel and the solids with high surface area and dispersion of the metallic phase is confirmed. The experimental strategy is focused on the study of parameters such as the optimization of temperature, hydrogen peroxide concentration and reaction time. Subsequently, the cooperative effect that exists between Cu and Co was verified, different loads of the metallic phase on the support and the stability of the best catalyst were evaluated through the application of five reaction cycles. In general, these materials proved to be catalytically active and selective in the oxidation of glycerol. Five reaction products were found, among them dihydroxyacetone (the main product), glyceric acid and glyceraldehyde, hydroxypyruvic acid and mesoxalic acid were identified. Finally, these catalysts have favorable catalytic activity under mild reaction conditions (80 ° C and atmospheric pressure). (Text taken from source) | eng |
| dc.description.degreelevel | Maestría | spa |
| dc.description.degreename | Magíster en Ciencias - Química | spa |
| dc.description.researcharea | Catálisis Heterogénea | spa |
| dc.format.extent | 107 páginas | spa |
| dc.format.mimetype | application/pdf | spa |
| dc.identifier.instname | Universidad Nacional de Colombia | spa |
| dc.identifier.reponame | Repositorio Institucional Universidad Nacional de Colombia | spa |
| dc.identifier.repourl | https://repositorio.unal.edu.co/ | spa |
| dc.identifier.uri | https://repositorio.unal.edu.co/handle/unal/79889 | |
| dc.language.iso | spa | spa |
| dc.publisher | Universidad Nacional de Colombia | spa |
| dc.publisher.branch | Universidad Nacional de Colombia - Sede Bogotá | spa |
| dc.publisher.department | Departamento de Química | spa |
| dc.publisher.faculty | Facultad de Ciencias | spa |
| dc.publisher.place | Bogotá, Colombia | spa |
| dc.publisher.program | Bogotá - Ciencias - Maestría en Ciencias - Química | spa |
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| dc.relation.references | [93] M. Tao, D. Zhang, X. Deng, X. Li, J. Shi, and X. Wang, “Lewis-acid-promoted catalytic cascade conversion of glycerol to lactic acid by polyoxometalates,” Chem. Commun., vol. 52, no. Scheme 1, pp. 3332–3335, 2016. | spa |
| dc.relation.references | [94] S. Gil, M. Marchena, C. María, L. Sánchez-silva, A. Romero, and J. Luís, “General Catalytic oxidation of crude glycerol using catalysts based on Au supported on carbonaceous materials,” Appl. Catal. A, vol. 450, pp. 189–203, 2013. | spa |
| dc.relation.references | [95] F. Dumeignil, “Crude glycerol as a raw material for the liquid phase oxidation reaction,” vol. 482, pp. 245–257, 2014. | spa |
| dc.relation.references | [96] J. C. Beltrán-Prieto, J. Pecha, V. Kašpárková, and K. Kolomazník, “Development of an HPLC method for the determination of glycerol oxidation products,” J. Liq. Chromatogr. Relat. Technol., vol. 36, no. 19, pp. 2758–2773, 2013. | spa |
| dc.rights | Derechos reservados al autor, 2021 | spa |
| dc.rights.accessrights | info:eu-repo/semantics/openAccess | spa |
| dc.rights.license | Atribución-NoComercial-SinDerivadas 4.0 Internacional | spa |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | spa |
| dc.subject.ddc | 540 - Química y ciencias afines::547 - Química orgánica | spa |
| dc.subject.lemb | Catalizadores | |
| dc.subject.lemb | Catalyst | |
| dc.subject.lemb | Catálisis | |
| dc.subject.lemb | Catalysis | |
| dc.subject.proposal | Oxidación de glicerol | spa |
| dc.subject.proposal | Metacaolinita dealuminizada | spa |
| dc.subject.proposal | Glicerol crudo | spa |
| dc.subject.proposal | Glycerol oxidation | eng |
| dc.subject.proposal | Dealuminized metakaolinite | eng |
| dc.subject.proposal | Crude glycerol | eng |
| dc.title | Oxidación parcial de glicerol sobre catalizadores de Cu-Co soportados en metacaolinita dealuminizada | spa |
| dc.title.translated | Partial glycerol oxidation over Cu-Co catalysts supported on dealuminized metakaolinite | spa |
| dc.type | Trabajo de grado - Maestría | spa |
| dc.type.coar | http://purl.org/coar/resource_type/c_bdcc | spa |
| dc.type.coarversion | http://purl.org/coar/version/c_ab4af688f83e57aa | spa |
| dc.type.content | Text | spa |
| dc.type.driver | info:eu-repo/semantics/masterThesis | spa |
| dc.type.redcol | http://purl.org/redcol/resource_type/TM | spa |
| dc.type.version | info:eu-repo/semantics/acceptedVersion | spa |
| dcterms.audience | General | spa |
| oaire.accessrights | http://purl.org/coar/access_right/c_abf2 | spa |
| oaire.awardtitle | Valorización catalítica de glicerol crudo generado como residuo en la producción de biodiésel a partir de aceite de palma. Código HERMES 41397 Convocatoria nacional para el apoyo a proyectos de investigación y creación artística de la Universidad Nacional de Colombia, Bogotá 2017-2018 | spa |
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