Lozano Calvo, SusanaLoaiza Rodríguez, Javier MauricioGarcía Domínguez, Juan CarlosGarcía Domínguez, María TrinidadLópez Baldovín, Francisco2024-03-052024-03-052024-01Lozano-Calvo, S., Loaiza, J. M., García, J. C., García, M. T., & López, F. (2024). Ultrasound-Assisted Cold Alkaline Extraction: Increasing Hemicellulose Extraction and Energy Production from Populus Wood. In Forests (Vol. 15, Issue 1, p. 109). MDPI AG. https://doi.org/10.3390/f150101091999-4907 (electrónico)https://hdl.handle.net/10272/23337Alkaline pretreatments are considered highly effective for the separation of the different components of lignocellulosic biomass. However, cold alkaline extraction (CAE) exhibits minimal modification/degradation of hemicellulosic fraction and successfully accomplishes efficient delignification. In this research, the fast-growing clone AF2 of Populus x euramericana wood was utilized as the raw material and subjected to ultrasound-assisted CAE. The objective of incorporating ultrasound into cold alkaline extraction is to increase the yield of a hemicellulosic-rich liquid phase that can be used to produce high-value products such as furfural or xylitol. Simultaneously, it aims to obtain a solid phase with a higher calorific value compared to the raw material. The results, obtained from a central composite factorial design, demonstrated that the CAE process for 90 min at a sodium hydroxide concentration of 100 g L−1, a temperature of 30 ◦C, and with ultrasound assistance maximized hemicellulose extraction in the liquid phase (60.8% was extracted) and improved the heating value of solid phase.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/BiomassDelignificationHemicellulosesPre-treatmentUltrasoundjournal article10.3390/f15010109open access3322.02 Generación de Energía33 Ciencias Tecnológicas