2026-06-30T01:12:41Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/91822024-05-27T07:04:59Zcom_10259_4244com_10259_5086com_10259_2604col_10259_4245

00925njm 22002777a 4500 dc Bermejo-López, A. author Illera Gigante, Alba Ester author Melgosa Gómez, Rodrigo author Beltrán Calvo, Sagrario author Sanz Díez, Mª Teresa author 2024-04-30 Lanthanides were tested (Ce3+, Er3+, and Yb3+) as catalysts to produce lactic acid (LA) from the monosaccharides present in corn stover (glucose, xylose, and arabinose) resulting in ytterbium being the most active. A MW-heated system led to similar LA yield as a conventionally heated pressurized system. The maximum value of LA yield was 40% at 240 °C after 20 min of isothermal treatment regardless the starting monosaccharides, which allowed to propose a similar LA production route based on the products profile determined along time for the three monosaccharides. Temperature and time determined the product profile, observing furfural degradation at severity factors higher than 3.5, while values higher than 5.5 were needed to observe LA degradation. By increasing temperature, catalyst solubility decreased, increasing its presence in the solid residue after treatment. Xylan conversion to LA was similar as for xylose, but lower yield was obtained from microcrystalline cellulose. Corn stover presented more amorphous regions leading to higher hydrolysis yields of its cellulose fraction. 1935-5130 http://hdl.handle.net/10259/9182 10.1007/s11947-024-03416-x 1935-5149 Lactic acid Lignocellulosic biomass Ytterbium Subcritical water Biomass valorisation Comparative Selective Conversion of Biomass-Derived Mono- and Polysaccharides into Lactic Acid with Lanthanide Lewis Acid Catalysts