RT info:eu-repo/semantics/article
T1 From Biomass to Sugar Alcohols: Purification of Wheat Bran Hydrolysates Using Boronic Acid Carriers Followed by Hydrogenation of Sugars over Ru/H-ZSM-5
A1 Sánchez Bastardo, Nuria
A1 Delidovich, Irina
A1 Alonso Sánchez, Gloria Esther
AB 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 hydrolysateprior to purification did not occur. We determined that proteins caused the deactivation of the catalyst, and consequently, theinhibition of the production of sugar alcohols.
PB ACS Publications
YR 2018
FD 2018
LK http://uvadoc.uva.es/handle/10324/35110
UL http://uvadoc.uva.es/handle/10324/35110
LA spa
NO ACS Sustainable Chem. Eng. (2018) 6, 11930-11938
DS UVaDOC
RD 28-nov-2024