Bimetallic platinum/iridium modified mesoporous catalysts applied in the hydrogenation of HMF

Catalytic transformation of 5-hydroxymethylfurfural (HMF) to produce 2,5-dimethylfuran (2,5-DMF) was studied over bimetallic (PtIr) and monometallic (Pt) catalysts supported on CMK-3 and SBA-15 mesoporous materials. The optimum temperature and hydrogen pressure for the maximum production of 2,5-DMF were 120 degrees C and 15 atm, respectively. Increases in temperature and pressure decreased the selectivity to 2,5-DMF. The catalysts were broadly characterized by different techniques, such as XRD, N-2-isotherms, XPS, TPR, TEM and NH3-TPD. It was found that the metallic particles were well reduced and highly dispersed on the surface of supports having large surface area and narrow pore size distribution. The PtIr alloy species catalytic sites were very active and selective towards the formation of the desired 2,5-DMF. PtIr-CMK-3 catalyst showed an excellent activity, selectivity and stability to be applied in this process.

Automated summary

The study investigated the catalytic transformation of HMF to produce 2,5-DMF over bimetallic (PtIr) and monometallic (Pt) catalysts supported on CMK-3 and SBA-15 mesoporous materials. It was found that PtIr-CMK-3 catalyst exhibited excellent activity, selectivity, and stability in this process, with well-reduced and highly dispersed metallic particles on the surface of supports having large surface area and narrow pore size distribution. The PtIr alloy species catalytic sites were very active and selective towards the formation of 2,5-DMF.