RT info:eu-repo/semantics/article
T1 The Study and Optimization of the AlCl3/SnCl2 Catalyst System in the Subcritical Water Production of Lactic Acid from Corn Stover
A1 Candela Gil, Helena
A1 Illera Gigante, Alba Ester
A1 Barea Gómez, Pedro
A1 Beltrán Calvo, Sagrario
A1 Sanz Díez, Mª Teresa
K1 Al(III)/Sn(II)
K1 Lactic acid
K1 Corn stover
K1 Subcritical water
K1 Organic acids
K1 Ácido láctico
K1 Lactic acid
AB The lactic acid (LA) production from corn stover using Lewis acid catalysts wasoptimized. Initially, an equimolar mixture of Al(III)/Sn(II) was used as a catalytic systemat 190 ◦C with 5 wt% biomass. Increasing the catalyst concentration led to higher LAproduction, showing the optimal results at 16 mM. A low catalyst concentration mainlyproduced furfural and HMF, dehydration products from the corn stover sugars. Highercatalyst concentration increased LA yield but also produced the degradation of the glucosedehydration products into levulinic and formic acids, reducing LA selectivity. Al(III)was essential for LA formation, while Sn(II) was less effective due to its lower solubility,shown by the presence of Sn(II) in the solid residue after treatments. A total of 16 mMAl(III) yielded the highest LA levels at 190 ◦C, 7.4 g/L, and 20.7% yield. Increasing thetemperature to 210 ◦C accelerated the LA production while also achieving the lowest energyconsumption, which was 0.47 kWh/g LA at the highest LA production point. However,longer treatments at this temperature caused LA degradation. AlCl3 has been identified asan ideal catalyst for biomass conversion to LA, being inexpensive and low in toxicity.
PB MDPI
YR 2025
FD 2025-06
LK https://hdl.handle.net/10259/10917
UL https://hdl.handle.net/10259/10917
LA eng
NO This research was funded by the Agencia Estatal de Investigación, grant numbers PID2022-136385OB-I00 and TED2021-129311B-I00, and the Junta de Castilla y León (JCyL) and the European Regional Development Fund (ERDF), grant numbers BU027P23. A.E. Illera’s post-doctoral contract was funded by BU027P23. H. Candela’s pre-doctoral contract was funded by JCyL and the European Social Fund [ORDEN EDU/1009/2024]. P. Barea’s pre-doctoral contract is funded by JCyL and the European Social Fund (ESF) [ORDEN EDU/1868/2022].
DS Repositorio Institucional de la Universidad de Burgos
RD 28-abr-2026