RT info:eu-repo/semantics/article
T1 Hydrolysis of cellulose to glucose by supercritical water and silver mesoporous zeolite catalysts
A1 Aspromonte, Soledad Guadalupe
A1 Romero, Alberto
A1 Boix, Alicia Viviana
A1 Alonso Sánchez, Gloria Esther
AB The hydrolysis of cellulose into glucose is a critical step for the conversion of lignocellulosicbiomass into fuels and chemical products. The combination of supercritical water hydrolysis in ultrafast reactors, with the subsequent hydrolysis of the cellooligosaccharides on silver-exchanged mesoporous mordenite zeolite, offers the possibility of a clear enhancement in the conversion of cellulose and in glucose formation. Complete dissolution of celluloseis achieved in the supercritical step and 81.8% of formed oligosaccharides are hydrolyzed in the catalytic step, with a yield into glucose of 77.0%. A fraction of Al is octahedrally coordinated, indicating a distribution of acid sites after the silver exchange. A deactivation of the catalyst between the first and third reaction cycle is observed, with a reduction in hydrolyzed carbon from 81.8% up to 45.6%. However, the selectivity to glucose only varies from 94.1 to 81.8%. Afterwards, the activity remains constant up to the fifth cycle. The presence of Ag(0) particles, together with the formation of coke, are responsible for the partial blockage of the pores of the support and loss of catalytic activity.
PB Springer
YR 2019
FD 2019
LK http://uvadoc.uva.es/handle/10324/35111
UL http://uvadoc.uva.es/handle/10324/35111
LA spa
NO Aspromonte, S.G., Romero, A., Boix, A.V. et al. Cellulose (2019) 26: 2471. https://doi.org/10.1007/s10570-018-2221-5
DS UVaDOC
RD 22-nov-2024