Understanding the role of Al/Zr ratio in Zr-Al-Beta zeolite: Towards the one-pot production of GVL from glucose

dc.contributor.authorPaniagua, Marta
dc.contributor.authorMorales, Gabriel
dc.contributor.authorMelero, Juan Antonio
dc.contributor.authorIglesias, Jose
dc.contributor.authorLópez-Aguado, Clara
dc.contributor.authorVidal, Nora
dc.contributor.authorMariscal, Rafael
dc.contributor.authorLópez-Granados, Manuel
dc.contributor.authorMartínez-Salazar, Irene
dc.date.accessioned2025-01-20T09:13:19Z
dc.date.available2025-01-20T09:13:19Z
dc.date.issued2021-04-07
dc.descriptionThe Spanish Ministry of Science, Innovation and Universities and the Regional Government of Madrid are kindly acknowledged for funding this research through the projects RTI2018-094918-B-C42, RTI2018-094918-B-C41, S2018/EMT-4344, and PEJD-2019-PRE_IND-15918. Clara López-Aguado acknowledges a FPI grant (BES-2015-072709) from the Government of Spain.
dc.description.abstractThe direct one-pot transformation of glucose into γ-valerolactone (GVL) can be accomplished by means of a cascade of reactions in which Brønsted acid-catalyzed transformations are combined with catalytic transfer hydrogenation (CTH) by using 2-propanol as sacrificial alcohol, avoiding the use of high-pressure hydrogen. Catalysts containing Zr Lewis acid sites have been successfully applied in CTH reactions while the acid-driven transformations can be preferentially promoted by Brønsted Al-related acidity. Here, we present the combination of Zr and Al as active sites within a BEA zeolite structure as catalyst, with the possibility of adjusting the Al/ Zr ratio from ∞ (commercial H-Beta) to 0 (aluminium-free Zr-Beta), which show a scale of Brønsted/Lewis acid sites ratios. The Al/Zr ratio has a strong impact on the products distribution. As the Zr content increases, higher amount of GVL is obtained, leading to a maximum over the catalyst with high amount of Zr and low content of Al acid sites (Al/Zr = 0.2). An increase of reaction temperature, as well as reaction time, allows an enhancement of yields towards the desired products, leading to a maximum yield towards GVL of 24 mol% over Zr-Al-Beta (2.0), and a maximum yield towards isopropyl lactate of 26 mol% over Zr-Beta at 190 ◦C.
dc.identifier.citationCatalysis Today 367 (2021) 228–238.
dc.identifier.doihttps://doi.org/10.1016/j.cattod.2020.04.025
dc.identifier.urihttps://hdl.handle.net/10115/59458
dc.language.isoen
dc.publisherElsevier
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectZirconium
dc.subjectBeta zeolite
dc.subjectBifunctional catalyst
dc.subjectCascade reaction
dc.subjectGamma-valerolactone
dc.titleUnderstanding the role of Al/Zr ratio in Zr-Al-Beta zeolite: Towards the one-pot production of GVL from glucose
dc.typeArticle

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