4.7 Article

Ru@hyperbranched Polymer for Hydrogenation of Levulinic Acid to Gamma-Valerolactone: The Role of the Catalyst Support

期刊

出版社

MDPI
DOI: 10.3390/ijms23020799

关键词

levulinic acid; gamma-valerolactone; ruthenium nanoparticle; hyperbranched polymer; hydrogenation; acid functionalization; heterogeneous catalyst

资金

  1. Russian Science Foundation [18-13-00332]
  2. [SP-4370.2021.1]
  3. Russian Science Foundation [18-13-00332] Funding Source: Russian Science Foundation

向作者/读者索取更多资源

In this study, Ru nanoparticle containing nanocomposites based on hyperbranched pyridylphenylene polymer were developed as catalysts, and the functionalization with sulfuric acid significantly enhanced their activity in the hydrogenation of levulinic acid to gamma-valerolactone, allowing the reaction to proceed under mild conditions with high yield and selectivity.
Hydrogenation of levulinic acid (LA) obtained from cellulose biomass is a promising path for production of gamma-valerolactone (GVL)-a component of biofuel. In this work, we developed Ru nanoparticle containing nanocomposites based on hyperbranched pyridylphenylene polymer, serving as multiligand and stabilizing matrix. The functionalization of the nanocomposite with sulfuric acid significantly enhances the activity of the catalyst in the selective hydrogenation of LA to GVL and allows the reaction to proceed under mild reaction conditions (100 degrees C, 2 MPa of H-2) in water and low catalyst loading (0.016 mol.%) with a quantitative yield of GVL and selectivity up to 100%. The catalysts were successfully reused four times without a significant loss of activity. A comprehensive physicochemical characterization of the catalysts allowed us to assess structure-property relationships and to uncover an important role of the polymeric support in the efficient GVL synthesis.

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