Pt/Al 2 O 3 Catalyzed 1,3‐Propanediol Formation from Glycerol using Tungsten Additives

Screening of four commercial catalysts (Pt/Al 2 O 3 , Pt/SiO 2 , Pd/Al 2 O 3 , and Pd/SiO 2 ) 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...

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Bibliographic Details
Published in:ChemCatChem 2013-02, Vol.5 (2), p.497-505
Main Authors: ten Dam, Jeroen, Djanashvili, Kristina, Kapteijn, Freek, Hanefeld, Ulf
Format: Article
Language:English
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Summary:Screening of four commercial catalysts (Pt/Al 2 O 3 , Pt/SiO 2 , Pd/Al 2 O 3 , and Pd/SiO 2 ) 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/Al 2 O 3 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.
ISSN:1867-3880
1867-3899
DOI:10.1002/cctc.201200469