Autor según el artículo: Sánchez V; Dafinov A; Salagre P; Llorca J; Cesteros Y

Departamento: Química Física i Inorgànica

Autor/es de la URV: Cesteros Fernández, Yolanda / Dafinov, Anton Ivanov / Salagre Carnero, María Pilar

Palabras clave: 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

Resumen: © 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.

Áreas temáticas: Química Physical and theoretical chemistry Farmacia Environmental science (all) Engenharias ii Ciências biológicas ii Chemistry, physical Catalysis Astronomia / física

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

ISSN: 20734344

Direcció de correo del autor: pilar.salagre@urv.cat yolanda.cesteros@urv.cat anton.dafinov@urv.cat anton.dafinov@urv.cat

Identificador del autor: 0000-0003-3257-2022 0000-0002-5439-9358 0000-0002-6124-3095 0000-0002-6124-3095

Fecha de alta del registro: 2023-02-18

Versión del articulo depositado: info:eu-repo/semantics/publishedVersion

Enlace a la fuente original: https://www.mdpi.com/2073-4344/9/9/706

URL Documento de licencia: http://repositori.urv.cat/ca/proteccio-de-dades/

Referencia al articulo segun fuente origial: Catalysts. 9 (9):

Referencia 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

DOI del artículo: 10.3390/catal9090706

Entidad: Universitat Rovira i Virgili

Año de publicación de la revista: 2019

Tipo de publicación: Journal Publications