RT Conference Proceedings
T1 Dehydration of glucose to 5-hydroxymethylfurfural using zirconium doped mesoporous silica as catalyst
A1 Mérida Morales, Sandra
A1 García-Sancho, Cristina
A1 Ginés-Molina, María José
A1 Cecilia-Buenestado, Juan Antonio
A1 Moreno-Tost, Ramón
A1 Maireles-Torres, Pedro Jesús
K1 Biomasa vegetal
K1 Catalizadores
K1 Glucosa
AB In recent years, the valorization of carbohydrates coming from lignocellulosic biomass. such asglucose, is gaining attention to obtain high value-added products like 5-hydroxymethylfurfural (HMF). The objective of this work was the dehydration of glucose to HMF by using different mesoporoussilica doped with Zr (Zr-KIT-6, Zr-MCM-41, Zr-SBA-15, Zr-SBA-15 (HT) y Zr-HMS) as acidcatalysts to maximize the HMF yield, and the study of the influence of textural and acid properties.The mesoporous silicas were synthesized with the same Si/Zr molar ratio= 5. The glucosedehydration was carried out at 150ºC and 175ºC under magnetic stirring. A biphasic reaction system(water:methylisobutylketone (MIBK)) was used in order to avoid side reactions. It was found thatthe addition of CaCl2 to the aqueous phase enhanced the HMF yield, as previously reported for othersolid acid catalysts. The reaction products were analyzed by HPLC. High glucose conversion isachieved for all the catalysts at 175ºC, but maximum values were obtained with the Zr-HMS catalyst. However, the HMF yield begins to decrease after the maximum value is attained due to sidereactions. Despite this fact, high HMF yields were observed in all cases, but it should be noted that theHMF yield with Zr-HMS is higher at shorter reaction times, in comparison with the other catalysts.For this reason, the catalytic performance of Zr-HMS was studied at 150ºC, in such a way that similarvalues of HMF yield than those obtained at 175ºC can be reached, but at longer reaction time.The optimization of different experimental variables has been performed, and structure-activitystabilityrelationships were proposed after the characterization of fresh and spent catalysts.
YR 2019
FD 2019-10-03
LK https://hdl.handle.net/10630/18513
UL https://hdl.handle.net/10630/18513
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026