Magnetically Recoverable Ruthenium-Containing Catalysts for Polysaccharide Conversion
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A new Ru-containing catalyst based on Fe3O4–SiO2 particles that exhibit magnetic properties is proposed for the hydrogenolysis of cellulose to glycols and the hydrolytic hydrogenation of inulin to mannitol. The effect of process parameters on the selectivity toward the main products is studied. Under optimum conditions of cellulose hydrogenolysis, the total glycol selectivity is ≈40% (ethylene glycol, 19.1%; propylene glycol, 20.9%) at 100% cellulose conversion. In the hydrolytic hydrogenation of inulin, the maximum mannitol selectivity is 44.3% at a 100% conversion of the feed polysaccharide. The proposed catalyst is stable under hydrothermal process conditions, and can be easily separated from the reaction mass using an external magnetic field.
Keywords:cellulose inulin magnetically recoverable catalysts hydrogenolysis ethylene glycol propylene glycol hydrolytic hydrogenation mannitol
The authors thank L.M. Bronstein at the Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, for her assistance in our research. This work was supported by the Russian Foundation for Basic Research, project nos. 16-08-00401, 18-08-00404; and by the Russian Science Foundation, project no. 17-19-01408.
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