RT info:eu-repo/semantics/article
T1 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
A1 Illera Gigante, Alba Ester
A1 Candela Gil, Helena
A1 Beltrán Calvo, Sagrario
A1 Sanz Díez, Mª Teresa
K1 Furfural
K1 Subcritical water/CO2 reaciton medium
K1 Reaction pathways
K1 Kinetic models
K1 Biotecnología
K1 Biotechnology
K1 Ingeniería química
K1 Chemical engineering
K1 Alimentos
K1 Food
AB 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.
PB Elsevier
SN 0961-9534
YR 2025
FD 2025
LK http://hdl.handle.net/10259/9967
UL http://hdl.handle.net/10259/9967
LA eng
NO 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].
DS Repositorio Institucional de la Universidad de Burgos
RD 21-ene-2025