Niobium phosphates as bifunctional catalysts for the conversion of biomass-derived monosaccharides

Author(s)

Vieira, Jose Lucas ; Paul, Geo ; Iga, Gustavo D. ; Cabral, Natalia M. ; Bueno, Jose Maria C. ; Bisio, Chiara ; Gallo, Jean Marcel R.

• Document type: Journal article
• Source: APPLIED CATALYSIS A-GENERAL; v. 617, p. 11-pg., 2021-03-25.

Abstract

The direct conversion of glucose and xylose into HMF and furfural is more efficient using a combination of Lewis and Br?nsted acids. Herein, niobium phosphates were prepared with different compositions, which affect its surface acidity and, consequently, the catalytic activity. The catalysts with a high P/Nb molar ratio presented a low molar ratio between Lewis and Br?nsted acid sites (L/B ratio), while those with low P/Nb molar ratio displayed a high L/B ratio. NbP-2, the sample with the highest L/B ratio, showed the highest reaction rate for both HMF and furfural formation. It was found, indeed, that the reaction rate for monosaccharides conversion and furans formation correlate linearly with the L/B ratio. The results presented not only introduce niobium phosphates with a high L/B molar ratio as promising catalysts for HMF and furfural production but also provide fundamental knowledge that will guide the design of other bifunctional heterogeneous catalysts. (AU)

• FAPESP's process: 20/15949-0 - Novel chemical catalytic and photocatalytic processes for the direct conversion of methane and CO2 to products
• Grantee: Gustavo Duran Iga
• Support Opportunities: Scholarships in Brazil - Technical Training Program - Technical Training
• FAPESP's process: 19/02132-8 - Mesoporous catalysts with Lewis acid and Brønsted acid bifunctionality for the direct conversion of biomass-derived saccharides into platform chemicals
• Grantee: José Lucas Vieira
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 16/02128-2 - Design of new catalytic systems for the biorefinery
• Grantee: Jean Marcel Ribeiro Gallo
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 18/01258-5 - Novel chemical catalytic and photocatalytic processes for the direct conversion of methane and CO2 to products
• Grantee: José Maria Correa Bueno
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 20/04109-0 - Synthesis of porous acid carbons for the conversion of glucose to HMF
• Grantee: José Lucas Vieira
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)