dor_id: 4110195

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856.4.0.u: https://jart.icat.unam.mx/index.php/jart/article/view/748/711

100.1.#.a: Ruiz, Misael García; Pliego, Julia Aguilar; Franco, Luis E. Noreña; Álvarez, Carlos Márquez; Pariente, Joaquín Pérez; Guaregua, Nancy C. M artin

524.#.#.a: Ruiz, Misael García, et al. (2018). Synthesis and characterization of a mesoporous cerium oxide catalyst for the conversion of glycerol. Journal of Applied Research and Technology; Vol. 16 Núm. 6. Recuperado de https://repositorio.unam.mx/contenidos/4110195

245.1.0.a: Synthesis and characterization of a mesoporous cerium oxide catalyst for the conversion of glycerol

502.#.#.c: Universidad Nacional Autónoma de México

561.1.#.a: Instituto de Ciencias Aplicadas y Tecnología, UNAM

264.#.0.c: 2018

264.#.1.c: 2019-06-29

653.#.#.a: Mesoporous Ce02; glycerol; acetol; dehydration

506.1.#.a: La titularidad de los derechos patrimoniales de esta obra pertenece a las instituciones editoras. Su uso se rige por una licencia Creative Commons BY-NC-SA 4.0 Internacional, https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode.es, para un uso diferente consultar al responsable jurídico del repositorio por medio del correo electrónico gabriel.ascanio@icat.unam.mx

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520.3.#.a: CeO2 mesoporous materials were synthesized employing the “hard and soft template” technique. Ceria catalysts have been prepared by a nanocasting procedure using SBA-15 and KIT-6 silica-based templates and Pluronic P123 and F127 for the “soft template” technique. The mesoporous CeO2 was characterized by techniques such as N2 physisorption, which confirmed a mesoporous size pore system and transmission electron microscopy, TEM, which confirmed the material ordered pore structure. TGA/DTA analysis was used to determine the loss of weight compared to the temperature before and after the elimination of the template. On the other hand, by means of IR spectroscopy of the Ce-KIT-6 material, the partial elimination of the Si template after the NaOH treatment was confirmed by decreasing the peaks corresponding to the vibration bands of the Si-O-Si linkages. Finally, by temperature-programmed desorption (TPD) of NH3 and CO2, the acid and basic strength of the catalysts were determined, respectively. All samples exhibited much higher total basicity relative to total acidity. The analysis of TPR-H2 showed regions of low temperature (350-400ºC) where the reduction of the bulk is plausible to be initiated and of high temperature (550ºC) of superficial reduction of the ceria.The performance of the catalysts was evaluated in the dehydration reaction of glycerol in gas phase at 320 ºC. The mesoporous CeO2 material was selective to acetol and reached a 100% conversion of glycerol. The catalyst prepared by the “soft template” technique (CeO2-P123) was the most selective to acetol (76%) with a 12% selectivity to acrolein. With the catalyst prepared by the “hard template” technique (Ce-KIT-6), the selectivity towards acetol was 48% and 22% towards acrolein. The acid properties of CeO2 were found to be a determining factor for the selectivity to acetol and acrolein.

773.1.#.t: Journal of Applied Research and Technology; Vol. 16 Núm. 6

773.1.#.o: https://jart.icat.unam.mx/index.php/jart

022.#.#.a: ISSN electrónico: 2448-6736; ISSN: 1665-6423

310.#.#.a: Bimestral

264.#.1.b: Instituto de Ciencias Aplicadas y Tecnología, UNAM

doi: https://doi.org/10.22201/icat.16656423.2018.16.6.748

harvesting_date: 2023-11-08 13:10:00.0

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Artículo

Synthesis and characterization of a mesoporous cerium oxide catalyst for the conversion of glycerol

Ruiz, Misael García; Pliego, Julia Aguilar; Franco, Luis E. Noreña; Álvarez, Carlos Márquez; Pariente, Joaquín Pérez; Guaregua, Nancy C. M artin

Instituto de Ciencias Aplicadas y Tecnología, UNAM, publicado en Journal of Applied Research and Technology, y cosechado de Revistas UNAM

Licencia de uso

Procedencia del contenido

Cita

Ruiz, Misael García, et al. (2018). Synthesis and characterization of a mesoporous cerium oxide catalyst for the conversion of glycerol. Journal of Applied Research and Technology; Vol. 16 Núm. 6. Recuperado de https://repositorio.unam.mx/contenidos/4110195

Descripción del recurso

Autor(es)
Ruiz, Misael García; Pliego, Julia Aguilar; Franco, Luis E. Noreña; Álvarez, Carlos Márquez; Pariente, Joaquín Pérez; Guaregua, Nancy C. M artin
Tipo
Artículo de Investigación
Área del conocimiento
Ingenierías
Título
Synthesis and characterization of a mesoporous cerium oxide catalyst for the conversion of glycerol
Fecha
2019-06-29
Resumen
CeO2 mesoporous materials were synthesized employing the “hard and soft template” technique. Ceria catalysts have been prepared by a nanocasting procedure using SBA-15 and KIT-6 silica-based templates and Pluronic P123 and F127 for the “soft template” technique. The mesoporous CeO2 was characterized by techniques such as N2 physisorption, which confirmed a mesoporous size pore system and transmission electron microscopy, TEM, which confirmed the material ordered pore structure. TGA/DTA analysis was used to determine the loss of weight compared to the temperature before and after the elimination of the template. On the other hand, by means of IR spectroscopy of the Ce-KIT-6 material, the partial elimination of the Si template after the NaOH treatment was confirmed by decreasing the peaks corresponding to the vibration bands of the Si-O-Si linkages. Finally, by temperature-programmed desorption (TPD) of NH3 and CO2, the acid and basic strength of the catalysts were determined, respectively. All samples exhibited much higher total basicity relative to total acidity. The analysis of TPR-H2 showed regions of low temperature (350-400ºC) where the reduction of the bulk is plausible to be initiated and of high temperature (550ºC) of superficial reduction of the ceria.The performance of the catalysts was evaluated in the dehydration reaction of glycerol in gas phase at 320 ºC. The mesoporous CeO2 material was selective to acetol and reached a 100% conversion of glycerol. The catalyst prepared by the “soft template” technique (CeO2-P123) was the most selective to acetol (76%) with a 12% selectivity to acrolein. With the catalyst prepared by the “hard template” technique (Ce-KIT-6), the selectivity towards acetol was 48% and 22% towards acrolein. The acid properties of CeO2 were found to be a determining factor for the selectivity to acetol and acrolein.
Tema
Mesoporous Ce02; glycerol; acetol; dehydration
Idioma
eng
ISSN
ISSN electrónico: 2448-6736; ISSN: 1665-6423

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