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Catalytic study of the direct conversion of glucose to 5-hydroxymethylfurfural using niobium-based catalysts

Grant number: 17/17042-9
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): December 01, 2017
Effective date (End): December 31, 2018
Field of knowledge:Engineering - Chemical Engineering
Principal Investigator:José Maria Correa Bueno
Grantee:José Lucas Vieira
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated research grant:16/02128-2 - Design of new catalytic systems for the biorefinery, AP.JP
Associated scholarship(s):18/10536-9 - Characterization of the surface acidity in niobium phosphates by FTIR using probe molecules, BE.EP.IC

Abstract

In a previous study, carried out by the student José Lucas Vieira, it was shown that amorphous niobium oxide, niobium phosphate and phosphated niobium oxide can perform the direct conversion of glucose into HMF, forming fructose as an intermediate. The most efficient catalysts were: NbP-2-Calc550, NbP-3-Calc550, Nb2O5-2 and Nb2O5P-2-25-48. These preliminary studies show that the catalysts are highly promising, justifying a more in-depth study of their catalytic activities. Thus, in this project, these catalysts will be evaluated by kinetic and stability studies, in order to establish the best reaction conditions. Initially, the catalysts will be evaluated using aprotic solvents (gamma-valerolactone and tetrahydrofuran) and protic (methanol and isopropanol) solvents. The reaction mixture will be analyzed at various reaction times, in order to construct a kinetic curve, which will allow to obtain data of reaction speed. The catalyst recycling test will also be performed, ie, or catalyst will be reused at least 5 times to assess its stability over the reaction cycles. (AU)