Journal of Siberian Federal University. Chemistry / Carbon Supported Size-Controlled Ru Catalysts for Selective Levulinic Acid Hydrogenation into γ-Valerolactone

Full text (.pdf)
Issue
Journal of Siberian Federal University. Chemistry. 2020 13 (1)
Authors
Simakova, Irina L.; Demidova, Yuliya S.; Simonov, Mikhail N.; Niphadkar, Prashant S.; Bokade, Vijay V.; Devi, Nandini; Dhepe, Paresh L.; Murzin, Dmitry Yu.
Contact information
Simakova, Irina L.: Boreskov Institute of Catalysis Novosibirsk, Russian Federation; Novosibirsk State University Novosibirsk, Russian Federation; ; Demidova, Yuliya S.: Boreskov Institute of Catalysis Novosibirsk, Russian Federation; Novosibirsk State University Novosibirsk, Russian Federation; Simonov, Mikhail N.: Boreskov Institute of Catalysis Novosibirsk, Russian Federation; Novosibirsk State University Novosibirsk, Russian Federation; Niphadkar, Prashant S.: CSIR-National Chemical Laboratory Pune, India; Bokade, Vijay V.: CSIR-National Chemical Laboratory Pune, India; Devi, Nandini: CSIR-National Chemical Laboratory Pune, India; Dhepe, Paresh L.: CSIR-National Chemical Laboratory Pune, India; Murzin, Dmitry Yu.: Process Chemistry Centre, Åbo Akademi University Turku/Åbo, FI-20500, Finland
Keywords
levulinic acid; hydrogenation; gamma-valerolactone; Ru catalysts; Ru colloidal nanoparticles; effect of polyvinylpyrrolidone; size effect
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

Pages
5-16
DOI
10.17516/1998-2836-0166
Paper at repository of SibFU
http://elib.sfu-kras.ru/handle/2311/135077