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Pt/Al 2 O 3 Catalyzed 1,3‐Propanediol Formation from Glycerol using Tungsten Additives
Author(s) -
ten Dam Jeroen,
Djanashvili Kristina,
Kapteijn Freek,
Hanefeld Ulf
Publication year - 2013
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201200469
Subject(s) - silicotungstic acid , 1,3 propanediol , glycerol , propanediol , catalysis , tungstic acid , aqueous solution , chemistry , tungsten , selectivity , platinum , bifunctional , yield (engineering) , phosphotungstic acid , nuclear chemistry , inorganic chemistry , organic chemistry , materials science , metallurgy
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.