Stable RuIr Nanoalloy Catalyst for Levulinic Acid Hydrogenation Reaction

Area of Science:

• Catalysis
• Green Chemistry
• Biomass Conversion

Background:

• Levulinic acid (LA) is a key biomass-derived platform chemical.
• γ-Valerolactone (GVL) is a high-value compound with diverse applications.
• Efficient catalytic conversion of LA to GVL is crucial for sustainable chemical production.

Purpose of the Study:

• To synthesize and evaluate an efficient RuIr alloy bimetallic catalyst supported on SiC.
• To investigate the aqueous hydrogenation of LA to GVL under mild conditions.
• To assess the catalyst's performance, selectivity, and stability.

Main Methods:

• Synthesis of a ruthenium-iridium (RuIr) alloy catalyst supported on silicon carbide (SiC).
• Aqueous hydrogenation of levulinic acid (LA) using the RuIr/SiC catalyst.
• Reaction conditions: 0.2 MPa H2 pressure and 25 °C.
• Analysis of catalyst performance, including conversion, selectivity, and recyclability.

Main Results:

• The RuIr/SiC catalyst achieved >99% conversion of LA and >99% selectivity to GVL.
• High performance was observed under mild aqueous conditions (25 °C, 0.2 MPa H2).
• The catalyst demonstrated excellent stability, with activity remaining unchanged after five cycles.

Conclusions:

• The RuIr/SiC catalyst is highly efficient and selective for producing GVL from LA.
• Synergistic effects between Ru and Ir on the SiC support contribute to the enhanced performance.
• The catalyst's stability and activity under mild conditions make it promising for industrial applications in biomass valorization.