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Effect of Acid Properties of Fluorinated Beta and ZSM-5 Zeolites Used as Supports of Ni Catalysts for the Catalytic Hydrodeoxygenation of Guaiacol

  • Dades identificatives

    Identificador: imarina:9386603
    Autors:
    Quintero-Arroyo, GabrielaRueda, Angie CGranados-Reyes, JudithFals, JaysonCesteros, Yolanda
    Resum:
    Commercial NH4-Beta and Na-ZSM-5 zeolites were fluorinated with different amounts of NH4F and using different procedures (room temperature, conventional refluxing, microwave refluxing). Samples were characterized by XRD, N2 physisorption, FTIR, 1H NMR, SEM-EDS, and TGA of adsorbed cyclohexylamine. An increase in the concentration of NH4F led to fluorinated zeolites with higher surface areas and slightly lower amounts of Br & oslash;nsted acid sites due to some dealumination. Fluorination by conventional or microwave refluxing at shorter times did not dealuminate ZSM-5, resulting in the formation of higher particle sizes. Ni/fluorinated beta catalysts were more active than Ni/fluorinated ZSM-5 catalysts for the hydrodeoxygenation of guaiacol at 180 degrees C and 15 bar of H2 for 1 h due to their higher amount of acid sites. The appropriate proportion of metallic and Br & oslash;nsted acid centers allowed for the selective obtention of cyclohexane (58%) for the Ni supported on beta fluorinated with NH4F 0.1 M catalyst. The combination of this fluorinated beta to a Ni/ordered mesoporous carbon catalyst significantly boosted its selectivity to cyclohexane from 0 to 65%. Fluorinated ZSM-5 samples, although having stronger Br & oslash;nsted acid sites, as observed by 1H NMR, they had lower amounts, leading to higher selectivity to cyclohexanol when used as catalytic supports.
  • Altres:

    Autor segons l'article: Quintero-Arroyo, Gabriela; Rueda, Angie C; Granados-Reyes, Judith; Fals, Jayson; Cesteros, Yolanda
    Departament: Química Física i Inorgànica
    e-ISSN: 2073-4344
    Autor/s de la URV: Cesteros Fernández, Yolanda
    Paraules clau: Bio-oil Biomass C Cyclohexan Fluorination Green Guaiacol hydrodeoxygenation Microwaves Model Ni catalysts Sites Zeolites
    Resum: Commercial NH4-Beta and Na-ZSM-5 zeolites were fluorinated with different amounts of NH4F and using different procedures (room temperature, conventional refluxing, microwave refluxing). Samples were characterized by XRD, N2 physisorption, FTIR, 1H NMR, SEM-EDS, and TGA of adsorbed cyclohexylamine. An increase in the concentration of NH4F led to fluorinated zeolites with higher surface areas and slightly lower amounts of Br & oslash;nsted acid sites due to some dealumination. Fluorination by conventional or microwave refluxing at shorter times did not dealuminate ZSM-5, resulting in the formation of higher particle sizes. Ni/fluorinated beta catalysts were more active than Ni/fluorinated ZSM-5 catalysts for the hydrodeoxygenation of guaiacol at 180 degrees C and 15 bar of H2 for 1 h due to their higher amount of acid sites. The appropriate proportion of metallic and Br & oslash;nsted acid centers allowed for the selective obtention of cyclohexane (58%) for the Ni supported on beta fluorinated with NH4F 0.1 M catalyst. The combination of this fluorinated beta to a Ni/ordered mesoporous carbon catalyst significantly boosted its selectivity to cyclohexane from 0 to 65%. Fluorinated ZSM-5 samples, although having stronger Br & oslash;nsted acid sites, as observed by 1H NMR, they had lower amounts, leading to higher selectivity to cyclohexanol when used as catalytic supports.
    Àrees temàtiques: Astronomia / física Catalysis Chemistry, physical Ciências biológicas ii Engenharias ii Environmental science (all) Farmacia Physical and theoretical chemistry Química
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    Adreça de correu electrònic de l'autor: yolanda.cesteros@urv.cat
    Identificador de l'autor: 0000-0002-5439-9358
    Data d'alta del registre: 2024-10-19
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://www.mdpi.com/2073-4344/14/9/586
    Referència a l'article segons font original: Catalysts. 14 (9): 586-
    Referència de l'ítem segons les normes APA: Quintero-Arroyo, Gabriela; Rueda, Angie C; Granados-Reyes, Judith; Fals, Jayson; Cesteros, Yolanda (2024). Effect of Acid Properties of Fluorinated Beta and ZSM-5 Zeolites Used as Supports of Ni Catalysts for the Catalytic Hydrodeoxygenation of Guaiacol. Catalysts, 14(9), 586-. DOI: 10.3390/catal14090586
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI de l'article: 10.3390/catal14090586
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2024
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Catalysis,Chemistry, Physical,Physical and Theoretical Chemistry
    Bio-oil
    Biomass
    C
    Cyclohexan
    Fluorination
    Green
    Guaiacol hydrodeoxygenation
    Microwaves
    Model
    Ni catalysts
    Sites
    Zeolites
    Astronomia / física
    Catalysis
    Chemistry, physical
    Ciências biológicas ii
    Engenharias ii
    Environmental science (all)
    Farmacia
    Physical and theoretical chemistry
    Química
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