RT info:eu-repo/semantics/conferenceObject
T1 One-pot lactic acid production using subcritical water as a sustainable approach in the valorization of corn stover
A1 Illera Gigante, Alba Ester
A1 Candela Gil, Helena
A1 Barea Gómez, Pedro
A1 Beltrán Calvo, Sagrario
A1 Sanz Díez, Mª Teresa
K1 Corn stover
K1 Valorization
K1 Lactic acid
K1 Subcritical water
K1 Food waste
AB Corn stover is an agricultural waste obtained after the corn grain harvest, formed by the stalks,leaves and cobs of the plant. Its production worldwide accounts with more than 1 billion tons peryear, and it is usually considered as feed for livestock. However, due to its interesting compositionof cellulose and hemicellulose fractions, corn stover can be considered as a valuable biomass forthe production of biofuels or value-added chemicals. Among the different possibilities, theproduction of lactic acid was chosen due to its broad application in the food and chemicalindustries, as a food preservative or flavoring, or as a precursor of polylactic acid, respectively. Inthis regard, a one-pot subcritical water treatment was proposed for the production of lactic acidfrom corn stover. Under subcritical conditions, water ionic product increases to a great extent,acquiring Brønsted acid properties, which combined with the Lewis acidity provided by thelanthanide Yb3+, makes a synergistic effect and favors the lactic acid production route from thepentoses and hexoses present in the biomass. The effect of temperature was tested from 180 to260 °C. It was determined that a minimum temperature of 220 °C was required to successfullyhydrolyze the cellulose and hemicellulose fractions into convertible monosaccharides. Thistemperature was selected as the optimum one, which yielded a 22 % lactic acid yield after just onehour, and showed a low HMF production, showing the high selectivity of the process at thistemperature. One-pot subcritical water treatment of corn stover proved to be a sustainable solutionfor the valorization of the agricultural waste.
YR 2025
FD 2025
LK https://hdl.handle.net/10259/12218
UL https://hdl.handle.net/10259/12218
LA eng
NO Trabajo presentado en: XVI International Scientific Agriculture Symposium "Agrosym 2025", Jahorina, Bosnia and Herzegovina, October 2-5, 2025
NO To the Agencia Estatal de Investigación (PID2022-136385OB-I00) and Junta de Castilla y León for funding A.E. Illera´s postdoctoral contract (BU027P23) and H. Candela´s PhD scholarship (Orden EDU/109/2024)
DS Repositorio Institucional de la Universidad de Burgos
RD 03-oct-2026