2026-04-21T04:48:24Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/99672025-01-21T13:56:38Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4245

Illera Gigante, Alba Ester 296 600 0000-0001-8321-5282 Candela Gil, Helena 924 600 Beltrán Calvo, Sagrario 57 600 0000-0003-2559-3925 Sanz Díez, Mª Teresa 530 600 0000-0003-1799-3099 2025-01-20T12:39:42Z 2025-01-20T12:39:42Z 2025 0961-9534 http://hdl.handle.net/10259/9967 10.1016/j.biombioe.2024.107550 A systematic kinetic study was conducted on the production of furfural from different sugar monomers, including xylose, arabinose and glucose, and xylan, a biopolymer rich in pentoses, in a subcritical water reaction medium intensified by the presence of CO2 as pressurization agent. The temperature range was from 150 to 200 °C, and different catalysts were employed, with CrCl3 as a Lewis acid catalyst. Glucose yielded very low amounts of furfural. Regarding pentoses, different reaction pathways were analyzed. The proposed mechanism involved the presence of the corresponding ketoses, xylulose and ribulose, from xylose and arabinose, respectively, as intermediates in furfural production. Formic acid was identified as the main degradation product in this reaction medium. It was concluded that formi acid was released into the medium from both pentoses and furfural. Pentose aldoses isomerization to ketoses, followed by furfural formation was the primary reaction pathway in this system. When using an acidic resin such as Nafion NR50 as catalyst, the isomerization of xylose was the rate-controlling step. When starting from xylan, similar furfural yields were obtained, but producitivity values evaluated over time were higher for xylose due to the two-step process involved in furfural production from xylan. The molecular weight distribution in the xylan system showed an initial increase for fractions in the range of 282–150 Da, while fractions of molecular weights higher than 1074 Da appeared only at the end of the treatment, likely due to the formation of different polymeric products. This work was supported by the Agencia Estatal de Investigación [grant numbers PID2022-136385OB-I00, TED2021-129311B-I00, PDC2022-133443-I00] and the Junta de Castilla y León (JCyL) and the European Regional Development Fund (ERDF) [grant number BU027P23]. A. E. Illera postdoctoral contract was funded by BU027P23. H Candela-Gil pre-doctoral contract was funded by JCyL and the European Social Fund [ORDEN EDU/1009/2024]. application/pdf eng Elsevier Biomass and Bioenergy. 2025, V. 193, 107550 https://doi.org/10.1016/j.biombioe.2024.107550 Atribución-NoComercial 4.0 Internacional http://creativecommons.org/licenses/by-nc/4.0/ info:eu-repo/semantics/openAccess Furfural Subcritical water/CO2 reaciton medium Reaction pathways Kinetic models Biotecnología Ingeniería química Alimentos Biotechnology Chemical engineering Food Insights into the kinetics of furfural production from different monomers and polymers derived from biomass in a subcritial water reaction medium intensified by CO2 as pressurization agent info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Biomass and Bioenergy 193 107550 THUMBNAIL Illera-bb_2025.pdf.jpg Illera-bb_2025.pdf.jpg IM Thumbnail image/jpeg 4841 https://riubu.ubu.es/bitstream/10259/9967/4/Illera-bb_2025.pdf.jpg 279e1e91190b538b20e011b9d2072141 MD5 4 LICENSE license.txt license.txt text/plain; charset=utf-8 998 https://riubu.ubu.es/bitstream/10259/9967/3/license.txt aa90105e1c90a1b4fe810649aa967b7d MD5 3 CC-LICENSE license_rdf license_rdf application/rdf+xml; charset=utf-8 914 https://riubu.ubu.es/bitstream/10259/9967/2/license_rdf 24013099e9e6abb1575dc6ce0855efd5 MD5 2 ORIGINAL Illera-bb_2025.pdf Illera-bb_2025.pdf application/pdf 2349569 https://riubu.ubu.es/bitstream/10259/9967/1/Illera-bb_2025.pdf 7eedcf0e9291898bf045b3a4a4263cf5 MD5 1 10259/9967 oai:riubu.ubu.es:10259/9967 2025-01-21 14:56:38.365 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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