n the context of exploitation of new biomass-derived platform chemicals, isosorbide (1,4:3,6-dianhydro-D-sor- bitol), obtained by the two-fold dehydration of sorbitol, is gaining increasing interest in several potential in- dustrial applications. Seeking for more sustainable, efficient, and economically competitive green processes, the use of heterogeneous catalysts under microwave (MW) irradiation has been adopted for the development of a neat one-pot process from glucose. MW-assisted catalytic processes have shown the potential to reduce the re- action time and improve the selectivity, due to the interaction of MW with the reaction medium through the production of hot spots on the catalyst surface. Ru/C, Ru/Al2O3 and Ru/TiO2 were tested for glucose hydro- genation to sorbitol, while the dehydration step was favored by the addition of β Zeolites (360:1 SiO2:Al2O3) allowing high isosorbide selectivity (>85 %). An extended structural and morphological characterization before and after the catalytic tests allowed to establish structure-activity relationships. Yields up to 47.1 % have been obtained directly from glucose in 1.5 h, achieving a considerable reduction of reaction time without the use of a solvent. thus paving the way for further investigations on biomass conversion into value-added products. With this aim, direct isosorbide production from milled cellulose was investigated. While the isosorbide yields still need to be improved, the dual role of formic acid both as acid catalyst for cellulose hydrolysis and H-donor for the reduction step was promisingly clarified

Sustainable isosorbide production by a neat one-pot MW-assisted catalytic glucose conversion

Belluati, M.;Tabasso, S.;Bucciol, F.;Cavani, F.;Cravotto, G.;Manzoli, M.
2023-01-01

Abstract

n the context of exploitation of new biomass-derived platform chemicals, isosorbide (1,4:3,6-dianhydro-D-sor- bitol), obtained by the two-fold dehydration of sorbitol, is gaining increasing interest in several potential in- dustrial applications. Seeking for more sustainable, efficient, and economically competitive green processes, the use of heterogeneous catalysts under microwave (MW) irradiation has been adopted for the development of a neat one-pot process from glucose. MW-assisted catalytic processes have shown the potential to reduce the re- action time and improve the selectivity, due to the interaction of MW with the reaction medium through the production of hot spots on the catalyst surface. Ru/C, Ru/Al2O3 and Ru/TiO2 were tested for glucose hydro- genation to sorbitol, while the dehydration step was favored by the addition of β Zeolites (360:1 SiO2:Al2O3) allowing high isosorbide selectivity (>85 %). An extended structural and morphological characterization before and after the catalytic tests allowed to establish structure-activity relationships. Yields up to 47.1 % have been obtained directly from glucose in 1.5 h, achieving a considerable reduction of reaction time without the use of a solvent. thus paving the way for further investigations on biomass conversion into value-added products. With this aim, direct isosorbide production from milled cellulose was investigated. While the isosorbide yields still need to be improved, the dual role of formic acid both as acid catalyst for cellulose hydrolysis and H-donor for the reduction step was promisingly clarified
2023
Inglese
Esperti anonimi
418
114086
114097
12
Isosorbide, One-pot conversion, Zeolites, Microwaves, Ruthenium-based heterogeneous catalysts
no
1 – prodotto con file in versione Open Access (allegherò il file al passo 6 - Carica)
262
7
Belluati, M.; Tabasso, S.; Bucciol, F.; Tabanelli, T.; Cavani, F.; Cravotto, G.; Manzoli, M.
info:eu-repo/semantics/article
mixed
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1895312
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