• Open Access

Pt/Al2O3 Catalyzed 1,3-Propanediol Formation from Glycerol using Tungsten Additives

Authors

  • Jeroen ten Dam,

    Corresponding author
    1. Biotechnology, Biocatalysis and Organic Chemistry, Delft University of Technology, Julianalaan 136, 2628 BL, Delft (The Netherlands)
    2. Present address: Johnson Matthey Technology Centre, Billingham (United Kingdom)
    • Biotechnology, Biocatalysis and Organic Chemistry, Delft University of Technology, Julianalaan 136, 2628 BL, Delft (The Netherlands)
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  • Dr. Kristina Djanashvili,

    1. Biotechnology, Biocatalysis and Organic Chemistry, Delft University of Technology, Julianalaan 136, 2628 BL, Delft (The Netherlands)
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  • Prof. Freek Kapteijn,

    1. Chemical Engineering, Catalysis Engineering, Delft University of Technology, Julianalaan 136, 2628 BL, Delft (The Netherlands)
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  • Prof. Ulf Hanefeld

    1. Biotechnology, Biocatalysis and Organic Chemistry, Delft University of Technology, Julianalaan 136, 2628 BL, Delft (The Netherlands)
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Abstract

Screening of four commercial catalysts (Pt/Al2O3, Pt/SiO2, Pd/Al2O3, and Pd/SiO2) and four acidic additives (hydrochloric, tungstic, phosphotungstic, and silicotungstic acids) shows that the combination of a platinum hydrogenation catalyst with tungsten containing acidic additives yields 1,3-propanediol from aqueous glycerol. The performance of the best catalytic system Pt/Al2O3 with silicotungstic acid as an additive was optimized by experimental design, capturing the influence of reaction time, glycerol concentration, acid concentration, pressure, and temperature on the formation of 1,3-propanediol from glycerol. High 1,3-propanediol yield in an aqueous batch system can be achieved (49 % conversion, 28 % selectivity) with excellent 1,3-propanediol to 1,2-propanediol ratios. A mechanistic interpretation is given for this bifunctional system, supported by the relative stability of 1,3-propanediol in comparison with 1,2-propanediol under the chosen reaction conditions.

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