2024-03-29T10:24:45Zhttp://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/351132021-07-06T08:34:33Zcom_10324_23040com_10324_954com_10324_894col_10324_23043
Cellulose hydrolysis using Ag exchanged in mesoporous mordenite
13th European Congress on Catalysis, Europacat 2017
Aspromonte, Soledad Guadalupe
Romero, Alberto
Boix, Alicia Viviana
Alonso Sánchez, Gloria Esther
This work presents the study of catalysts based on Ag exchanged in mesoporous mordenite used to complete the hydrolysis of oligomers derived from the solubilization of cellulose in supercritical water. The synthesized mesoporous zeolitic support showed a significant increase in pore volume and size in comparison to the original zeolite. The incorporation of Ag did not significantly modify the pore size, which allows the voluminous oligomer molecules to reach the active centers. By means of characterization techniques, the presence of Ag (I) ions in interaction with the structure was detected. Through adsorption and desorption of NH3 it was determined that silver species favor the formation of strong acid sites. During the exchange of Na (I) by Ag (I) ions are also produced protons H+ (acid medium) which are located in the network and confer moderate acidic character. The combination of a mesoporous zeolite with Ag (I) ions allowed almost complete hydrolysis of the cellulose (81.8%) with a yield of glucose of 43.5%. Thus, the presence of Ag modified the acid-base properties improving the hydrolysis of cellulose.
Project CTQ2015-64892-R (MINECO/FEDER)
2019-03-17T22:05:49Z
2019-03-17T22:05:49Z
2017
info:eu-repo/semantics/conferenceObject
http://uvadoc.uva.es/handle/10324/35113
eng
info:eu-repo/semantics/restrictedAccess
application/pdf
https://uvadoc.uva.es/bitstream/10324/35113/5/EUROPACAT_2017_resumen.pdf.jpg
Hispana
TEXT
http://rightsstatements.org/vocab/CNE/1.0/
UVaDOC. Repositorio Documental de la Universidad de Valladolid
http://uvadoc.uva.es/handle/10324/35113