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Integral valorization of vine shoots: Production of xylitol, butanol and 2,3-butanediol in a biorefinery context López Linares, Juan Carlos Romero García, Juan Miguel Vidal, Alfonso M. Lucas Yagüe, Susana Coca Sanz, Mónica García Cubero, M.Teresa Romero, Inmaculada Castro, Eulogio Vine shoots Xylitol Butanol Separate hydrolysis and fermentation Simultaneous saccharification and fermentation 31 Ciencias Agrarias Producción Científica Vine shoots, a carbohydrate-rich lignocellulosic residue, represent a promising feedstock for producing xylitol, butanol, and 2,3-butanediol (2,3-BDO) in an integrated biorefinery. In this work, dilute sulfuric acid steam explosion (190 ◦C, 5 min, 1.6% w/v H2SO4) was used for the pretreatment of vine shoots. Xylitol was subse- quently produced from the vine shoots hemicellulosic hydrolysate using C. boidinii and C. guilliermondii; while butanol and 2,3-BDO were generated from the remaining solid fraction of vine shoots using C. beijerinckii and P. polymyxa, respectively. Furthermore, two process configurations for butanol and 2,3-BDO generation were evaluated: separate hydrolysis and fermentation (SHF) and simultaneous saccharification and fermentation (SSF), with comparisons conducted at high solids loadings (10% and 15% w/v). As a result, 8.4 g/L xylitol were achieved from the hemicellulosic fraction with C. boidinii. From the cellulosic fraction, the SHF configuration at the highest solids loading (15% w/v) yielded 8.8 g/L of butanol (corresponding to 12.4 g/L of total ABE) and 13.8 g/L of 2,3-BDO. Therefore, these results demonstrate the potential of vine shoots as a versatile feedstock for an integrated biorefinery Ministerio de Ciencia e Innovación (proyectos PID2020-115110RB-I00/AEI/10.13039/501100011033; PID2023-147967OB-I00/MCIU/AEI/10.13039/501100011033 / FEDER, UE; y PID2020-112594RB-C31) Junta de Castilla y León (UIC 320) 2026-04-06T11:26:50Z 2026-04-06T11:26:50Z 2026 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Journal of Industrial and Engineering Chemistry, 2026, 1226-086X https://uvadoc.uva.es/handle/10324/83921 10.1016/j.jiec.2026.03.024 Journal of Industrial and Engineering Chemistry eng https://www.sciencedirect.com/science/article/pii/S1226086X26001735 Attribution-NonCommercial-NoDerivatives 4.0 Internacional info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ © 2026 The Author(s) application/pdf Elsevier https://uvadoc.uva.es/bitstream/10324/83921/4/Integral-valorization-vine-shoots.pdf.jpg Hispana TEXT http://creativecommons.org/licenses/by-nc-nd/4.0/ UVaDOC. Repositorio Documental de la Universidad de Valladolid https://uvadoc.uva.es/handle/10324/83921