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- W4291732970 abstract "Herein, we demonstrate that surface acid-base properties have marked effect upon the performance (activity, selectivity and stability) of supported Ru catalysts upon tandem hydrocyclization (hydrogenation-dehydration) of aqueous levulinic acid. A mesoporous bi-functional Ru/NbOPO4/SBA-15 catalyst incorporating highly dispersed Ru sites and well balanced strong Brønsted acidic sites (optimum B/L and M+S/W ratio) was identified, which outperformed the benchmark monofuncational (Ru/SBA-15, Ru/MCM-41) and physically blended bi-functional catalysts (Ru catalysts mixed with acid co-catalysts e.g. NbOPO4/Amberlyst-15). Further, the catalyst also demonstrated remarkable stability in a fixed-bed reactor, maintaining steady activity and γ-valerolactone selectivity (72–86%) during ca. 300 h time on stream (10 bar, 90–100 °C), corroborating its industrial potential. The exceptional performance and durability of the bi-functional catalyst was attributed to the presence of well dispersed hydrothermally and chemically stable acid (NbOPO4) and redox (Ru) sites." @default.
- W4291732970 created "2022-08-16" @default.
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- W4291732970 date "2022-08-01" @default.
- W4291732970 modified "2023-09-27" @default.
- W4291732970 title "Continuous hydrocyclization of aqueous levulinic acid to γ-valerolactone over bi-functional Ru/NbOPO4/SBA-15 catalyst under mild conditions" @default.
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- W4291732970 doi "https://doi.org/10.1016/j.apcata.2022.118744" @default.
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