Hydrogenolysis of 1,2-Propanediol for the Production of Biopropanols from Glycerol

Authors

  • Yasushi Amada,

    1. Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8573 (Japan), Fax:(+81) 22 795 7214
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  • Shuichi Koso,

    1. Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8573 (Japan), Fax:(+81) 22 795 7214
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  • Yoshinao Nakagawa,

    1. Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8573 (Japan), Fax:(+81) 22 795 7214
    2. International Center for Materials Nanoarchitectonics Satellite (MANA), National Institute of Materials Science (NIMS) and University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8573 (Japan)
    3. Present address School of Engineering, Tohoku University, 6-6-07, Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan)
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  • Keiichi Tomishige

    1. Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8573 (Japan), Fax:(+81) 22 795 7214
    2. International Center for Materials Nanoarchitectonics Satellite (MANA), National Institute of Materials Science (NIMS) and University of Tsukuba, 1-1-1, Tennodai, Tsukuba, Ibaraki 305-8573 (Japan)
    3. Present address School of Engineering, Tohoku University, 6-6-07, Aoba, Aramaki, Aoba-ku, Sendai 980-8579 (Japan)
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Abstract

Production of propanols from glycerol, which are known as biopropanols, requires catalysts for the hydrogenolysis of 1,2-propanediol, which has been easily derived from glycerol. It is found that the Rh/SiO2 catalysts modified with ReOxspecies exhibited high activity and selectivity in the hydrogenolysis of 1,2-propanediol to propanols with low selectivity to degradation products and high stability. The optimized Rh[BOND]ReOx/SiO2 (Re/Rh=0.5) catalyst gave high yields of 1-propanol (66 %) and propanols (1-propanol +2-propanol) (85 %) in the hydrogenolysis of 1,2-propanediol. In addition, the catalyst was applicable to the one-pot conversion of glycerol to propanols. The structure of Rh metal particles with attached ReOxclusters is suggested from the catalyst characterization. It is proposed that 1,2-propanediol hydrogenolysis proceeds by the hydrogenolysis of the alkoxide species on Re with hydrogen species on the Rh metal surface.

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