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Microwave-assisted furfural production using hectorites and fluorohectorites as catalysts

  • Dades identificatives

    Identificador: imarina:5874183
    Autors:
    Sánchez VDafinov ASalagre PLlorca JCesteros Y
    Resum:
    © 2019 by the authors. Licensee MDPI, �Basel, Switzerland. It has previously been reported that the use of microwave heating, together with the presence of co-solvents, improves the efficiency of furfural production from biomass. Solid acid catalysts can be a good alternative to mineral acids, since they can prevent corrosion and can be reused. However, the formation of humines should be minimized. Several delaminated and fluorinated hectorites, with different types and strengths of acid sites, were synthesized and tested as catalysts for the production of furfural from commercial xylose and from an acid biomass extract of almond shells. A new methodology was developed to prepare crystalline fluorohectorite at 800◦ C in just 3 h. The presence of F significantly increased the acidity strength in the protonated fluorohectorite (H-FH) taking into account its high ammonia desorption temperature (721◦ C). Additionally, this sample had fourteen times higher total acidity by m2 than the reference H-βeta acid catalyst. H-FH was the most efficient catalyst at short reaction times (1 h) for the transformation of xylose to furfural under microwaves using toluene as co-solvent, regardless of whether the xylose was commercial (20% furfural yield) or an extract of almond shells (60% furfural yield). However, the acidity of the extract affected the fluorohectorite structure and composition.
  • Altres:

    Autor segons l'article: Sánchez V; Dafinov A; Salagre P; Llorca J; Cesteros Y
    Departament: Química Física i Inorgànica
    Autor/s de la URV: Cesteros Fernández, Yolanda / Dafinov, Anton Ivanov / Salagre Carnero, María Pilar
    Paraules clau: Xylan Solid-acid Organic-acids Microwaves Liquid-phase dehydration Heterogeneous catalysis Green chemistry Glucose Furfural Fructose Fluorohectorite D-xylose Conversion Clays Chemistry Biphasic system Biomass
    Resum: © 2019 by the authors. Licensee MDPI, �Basel, Switzerland. It has previously been reported that the use of microwave heating, together with the presence of co-solvents, improves the efficiency of furfural production from biomass. Solid acid catalysts can be a good alternative to mineral acids, since they can prevent corrosion and can be reused. However, the formation of humines should be minimized. Several delaminated and fluorinated hectorites, with different types and strengths of acid sites, were synthesized and tested as catalysts for the production of furfural from commercial xylose and from an acid biomass extract of almond shells. A new methodology was developed to prepare crystalline fluorohectorite at 800◦ C in just 3 h. The presence of F significantly increased the acidity strength in the protonated fluorohectorite (H-FH) taking into account its high ammonia desorption temperature (721◦ C). Additionally, this sample had fourteen times higher total acidity by m2 than the reference H-βeta acid catalyst. H-FH was the most efficient catalyst at short reaction times (1 h) for the transformation of xylose to furfural under microwaves using toluene as co-solvent, regardless of whether the xylose was commercial (20% furfural yield) or an extract of almond shells (60% furfural yield). However, the acidity of the extract affected the fluorohectorite structure and composition.
    Àrees temàtiques: Química Physical and theoretical chemistry Farmacia Environmental science (all) Engenharias ii Ciências biológicas ii Chemistry, physical Catalysis Astronomia / física
    Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 20734344
    Adreça de correu electrònic de l'autor: pilar.salagre@urv.cat yolanda.cesteros@urv.cat anton.dafinov@urv.cat anton.dafinov@urv.cat
    Identificador de l'autor: 0000-0003-3257-2022 0000-0002-5439-9358 0000-0002-6124-3095 0000-0002-6124-3095
    Data d'alta del registre: 2023-02-18
    Versió de l'article dipositat: info:eu-repo/semantics/publishedVersion
    Enllaç font original: https://www.mdpi.com/2073-4344/9/9/706
    Referència a l'article segons font original: Catalysts. 9 (9):
    Referència de l'ítem segons les normes APA: Sánchez V; Dafinov A; Salagre P; Llorca J; Cesteros Y (2019). Microwave-assisted furfural production using hectorites and fluorohectorites as catalysts. Catalysts, 9(9), -. DOI: 10.3390/catal9090706
    URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
    DOI de l'article: 10.3390/catal9090706
    Entitat: Universitat Rovira i Virgili
    Any de publicació de la revista: 2019
    Tipus de publicació: Journal Publications
  • Paraules clau:

    Catalysis,Chemistry, Physical,Physical and Theoretical Chemistry
    Xylan
    Solid-acid
    Organic-acids
    Microwaves
    Liquid-phase dehydration
    Heterogeneous catalysis
    Green chemistry
    Glucose
    Furfural
    Fructose
    Fluorohectorite
    D-xylose
    Conversion
    Clays
    Chemistry
    Biphasic system
    Biomass
    Química
    Physical and theoretical chemistry
    Farmacia
    Environmental science (all)
    Engenharias ii
    Ciências biológicas ii
    Chemistry, physical
    Catalysis
    Astronomia / física
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