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  • Catalytic Transfer Hydrogen...
    Chang, Xin; Liu, An-Feng; Cai, Bo; Luo, Jin-Yue; Pan, Hui; Huang, Yao-Bing

    ChemSusChem, December 8, 2016, Letnik: 9, Številka: 23
    Journal Article

    The catalytic transfer hydrogenation of furfural to the fuel additives 2‐methylfuran (2‐MF) and 2‐methyltetrahydrofuran (2‐MTHF) was investigated over various bimetallic catalysts in the presence of the hydrogen donor 2‐propanol. Of all the as‐prepared catalysts, bimetallic Cu‐Pd catalysts showed the highest catalytic activities towards the formation of 2‐MF and 2‐MTHF with a total yield of up to 83.9 % yield at 220 °C in 4 h. By modifying the Pd ratios in the Cu‐Pd catalyst, 2‐MF or 2‐MTHF could be obtained selectively as the prevailing product. The other reaction conditions also had a great influence on the product distribution. Mechanistic studies by reaction monitoring and intermediate conversion revealed that the reaction proceeded mainly through the hydrogenation of furfural to furfuryl alcohol, which was followed by deoxygenation to 2‐MF in parallel to deoxygenation/ring hydrogenation to 2‐MTHF. Finally, the catalyst showed a high reactivity and stability in five catalyst recycling runs, which represents a significant step forward toward the catalytic transfer hydrogenation of furfural. Identifying the intermediates: The catalytic transfer hydrogenation of biomass‐derived furfural to fuel additives 2‐methylfuran and 2‐methyltetrahydrofuran is performed over a bimetallic Cu‐Pd catalyst in the presence of 2‐propanol. The reaction proceeds via the intermediate furfuryl alcohol, which is then deoxygenated/hydrogenated to the desired products.