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Synthesis of niobium phosphate and phosphated niobium oxide as bifunctional catalysts for the glucose conversion in 5-hydroxymethylfurfural

Grant number: 16/15777-9
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): September 01, 2016
Effective date (End): August 31, 2017
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Jean Marcel Ribeiro Gallo
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

Abstract

Recently, it has been observed a great interest in research on renewable sources of energy to replace petroleum and that would allow diminishing the greenhouse effect. In this context, lignocellulosic biomass raises as a valuable substrate for the production of platform chemicals, such the 5-hydroxymethylfurfural (HMF), an important intermediate for the production of chemicals. This molecule is obtained from the dehydration of hexoses by acid catalysis and mechanistic studies show that the reaction undergoes though the dehydration of the furanose isomer. Usually, fructose is used for HMF production, since it has a higher concentration of the furanose than the glucose. However, fructose is more expensive than glucose and therefore it would be interesting to produce HMF directly from glucose. Recent studies have shown that for this reaction to take place, bifunctional catalysts are necessary. Aiming to develop heterogeneous bifunctional catalysts that allow HMF production from glucose with high yields, herein, it is proposed the synthesis of phosphates niobium oxide and niobium phosphate. This research happens to be interesting nationally, since Brazil has the largest niobium reserves and is the biggest producer. The catalysts prepared by different methods will be used for the onepot conversion of glucose into HMF and compared with other catalysts reported in the literature.