Author, as appears in the article.: Gebretsadik, Fiseha Bogale; Ruiz-Martinez, Javier; Gonzalez, Maria Dolores; Salagre, Pilar; Cesteros, Yolanda;
Department: Química Física i Inorgànica
URV's Author/s: Cesteros Fernández, Yolanda / González Candela, Maria Dolores / Salagre Carnero, María Pilar
Keywords: Xrd measurements Vinyloxirane Transformation Selective hydrogenolysis Reaction temperature Product Performance Nickel metallography Nickel Metal activity Isomerization Hydrolysis Hydrogenolysis H2-chemisorption Glycerol hydrogenolysis Effect of coppers Cyclic ethers Copper metallography Copper alloys Copper Catalysts Binary alloys Bimetallic catalysts Batch reactors Acid 1,3-propanediol 1 ,3 propanediol 1 ,2-propanediol
Abstract: The effect of copper on various acid saponite supported Ni-Cu bimetallic catalysts, prepared with different Ni : Cu ratios, was studied for the liquid phase hydrogenolysis of glycidol on a batch reactor at 393 and 453 K. Characterization of the catalysts showed that Ni and Cu are in close contact as the XRD measurements evidenced the formation of an alloy. H-2 chemisorption results revealed that the measured metallic area progressively decreased with an increase in the wt% of copper. In the presence of high metal activity (higher Ni wt%), the formation of 1,2-propanediol (1,2-PD) outweighed, while acid activity led to the formation of dimerization and oligomerization products. The addition of Cu and the increase of the reaction temperature decreased the diol formation but boosted the 1,3-PD/1,2-PD ratio. This could be explained by an improvement of the collaborative effect between the metal Ni and the H+ of the saponite. Therefore, the presence of an appropriate amount of Cu allowed the control of the hydrogenation capacity of Ni and enhanced the collaborative effect of Ni and H+ favouring the formation of 1,3-propanediol with respect to 1,2-propanediol.
Thematic Areas: Química Odontología Medicina ii Materiais Interdisciplinar Inorganic chemistry General medicine Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Engenharias i Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Chemistry, inorganic & nuclear Biotecnología Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: mdolores.gonzalez@urv.cat pilar.salagre@urv.cat yolanda.cesteros@urv.cat
Author identifier: 0000-0003-3257-2022 0000-0002-5439-9358
Record's date: 2024-07-27
Papper version: info:eu-repo/semantics/acceptedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Dalton Transactions. 50 (26): 9198-9207
APA: Gebretsadik, Fiseha Bogale; Ruiz-Martinez, Javier; Gonzalez, Maria Dolores; Salagre, Pilar; Cesteros, Yolanda; (2021). Cu boosting the collaborative effect of Ni and H+ in alloyed NiCu/saponite catalysts for hydrogenolysis of glycidol. Dalton Transactions, 50(26), 9198-9207. DOI: 10.1039/d1dt01189h
Entity: Universitat Rovira i Virgili
Journal publication year: 2021
Publication Type: Journal Publications
Repositori URV