2026-05-05T21:47:42Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/351102025-02-18T11:06:39Zcom_10324_31661com_10324_952com_10324_894com_10324_23040com_10324_954col_10324_31662col_10324_23041

Sánchez Bastardo, Nuria Delidovich, Irina Alonso Sánchez, Gloria Esther Wheat bran is a lignocellulosic waste of milling industry. It contains hemicelluloses, which can be valorized into arabitol and xylitol via a few-step approach. It begins with extraction and hydrolysis of hemicelluloses to produce a solution of xylose and arabinose, along with proteins and inorganic salts. This work focuses on the purification of sugars of this hydrolysate and the subsequent catalytic production of sugar alcohols. A purification process based on the recovery of sugars by anionic extraction with a boronic acid, followed by back-extraction and a further refining step with ion exchange resins is described. After this process, a high purity sugars solution (∼90%) free of inorganic elements and proteins was obtained. The feasibility of the process was also highlighted by a successful recycling of the organic phase containing the boronic acid. The hydrogenation of purified sugars was then performed over Ru/H-ZSM-5. A high yield into pentitols of ∼70% with 100% selectivity was achieved. Importantly, the catalytic hydrogenation of sugars in the hydrolysate prior to purification did not occur. We determined that proteins caused the deactivation of the catalyst, and consequently, the inhibition of the production of sugar alcohols. 2019-03-17 2019-03-17 2018 info:eu-repo/semantics/article ACS Sustainable Chem. Eng. (2018) 6, 11930-11938 http://uvadoc.uva.es/handle/10324/35110 10.1021/acssuschemeng.8b02206 spa https://pubs.acs.org/doi/abs/10.1021%2Facssuschemeng.8b02206 info:eu-repo/semantics/openAccess ACS Publications