Carbon supported size-controlled ru catalysts for selective levulinic acid hydrogenation into γ-valerolactone

Irina L. Simakova, Yuliya S. Demidova, Mikhail N. Simonov, Prashant S. Niphadkar, Vijay V. Bokade, Nandini Devi, Paresh L. Dhepe, Dmitry Yu Murzin

Research output: Contribution to journalArticlepeer-review

Abstract

Liquid phase levulinic acid hydrogenation into γ-valerolactone in 1,4-dioxane as a solvent (165°C, 20 bar) was studied over a range of Ru monometallic catalysts using mesoporous carbon material Sibunit as a support. In addition to the catalyst prepared by impregnation with RuCl3∙nH2O (0.1 M) followed by reduction in H2, size-controlled Ru(NPs)/Sibunit catalysts were synthesized by immobilization of polyvinylpyrrolidone (PVP) stabilized Ru nanoparticles (NPs) (dRu=2.4 nm). Сarbon supported colloidal Ru NPs were not studied earlier in levulinic acid hydrogenation. Activity of colloidal Ru(NPs)/Sibunit catalysts was found to be lower than that of impregnated Ru/Sibunit which could be attributed to hampering effect of PVP. However, colloidal Ru(NPs)/Sibunit purified by thermal treatment in air (180°C) followed by reduction in H2 (400°C) exhibited the same activity as impregnated one yielding 93% γ-valerolactone at 100% levulinic acid conversion. Applicability of supported PVP-assisted colloidal Ru NPs in hydrogenation of levulinic acid illustrates a potential to prepare more efficient catalysts for this reaction with a desired particle size. The catalysts were characterized by TEM, XRF, and N2 physisorption to compare their physical chemical properties.

Translated title of the contributionРутениевые катализаторы на углеродном носителе с контролируемым размером частиц для селективного гидрирования левулиновой кислоты в γ-валеролактон
Original languageEnglish
Article number1
Pages (from-to)5-16
Number of pages12
JournalJournal of Siberian Federal University: Chemistry
Volume13
Issue number1
DOIs
Publication statusPublished - 2020

Keywords

  • levulinic acid
  • hydrogenation
  • gamma-valerolactone
  • Ru catalysts
  • Ru colloidal nanoparticles
  • effect of polyvinylpyrrolidone
  • size effect

State classification of scientific and technological information

  • 31 CHEMISTRY

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