Highly efficient selective hydrogenation of levulinic acid to γ-valerolactone over Cu–Re/TiO₂ bimetallic catalysts

Abstract

Herein, we report a highly efficient and recyclable Cu–Re(1 : 1)/TiO2 bimetallic catalyst for liquid phase hydrogenation of levulinic acid to γ-valerolactone.

Upgrading of Aqueous Ethanol to Long-Chain Alcohols over Immobilized Highly Dispersed Ni–Re Catalyst

“…In addition, element mapping and dark-field scanning were performed for 70-NiRe@C (Figure f,h). The results of mapping analysis show that the catalyst has a spherical structure wrapped in carbon layer, and the Ni and Re elements are dispersed with aggregation state on the surface of the carbon layer. , …”

“…The results of mapping analysis show that the catalyst has a spherical structure wrapped in carbon layer, and the Ni and Re elements are dispersed with aggregation state on the surface of the carbon layer. 25,38 The physicochemical property of spent-70-NiRe@C-2−500 catalyst was analyzed after fourth typical experiment (Figure S2). After the reaction, spent-70-NiRe@C-2−500 still shows dispersed nanoparticle morphology with the average particle size of 5.9 nm, and the lattice spacing is 0.198 nm, which is between the crystal plane spacing of Ni (200) and Re (101).…”

Synthesis of Nitrogen- and Oxygen-Containing Heterocycles Catalysed by Metal Nanoparticles Reported in 2022

“…The complete conversion of 133 into γ-valerolactone ( 134 ) was achieved in 1,4-dioxane as solvent at 180 °C for 4 h using Cu-Re/TiO 2 catalysts (1:1; Scheme 39 ). 92 The reuse of the catalysts was possible at least six times with only modest loss of activity.…”

Highly efficient Ni–Mn/SiO2catalyst for the selective hydrogenation of biomass-derived levulinic acid to γ-valerolactone under mild conditions

“…Typically, GVL can be obtained through hydrogenation and cyclization of LA over homogeneous or heterogeneous catalysts (Scheme 1). 10 In consideration of easy product separation and catalyst recycling, heterogeneous catalysts are preferred. Supported noble metals (such as Pt, Ir and Ru) have been employed and shown good catalytic performance for the selective hydrogenation of LA into GVL.…”