The Influence of Preparation Procedures for Platinum/Tungsten Oxide/Amorphous Silicon Aluminum Oxide Catalysts on their Performance in the Catalytic Hydrogenolysis of Glycerol
Abstract:The selective hydrogenolysis of glycerol to 1,3-propanediol (1,3-PDO) is not only an important industrial process but a scientific issue. The platinum/tungsten oxide/amorphous silicon-aluminum oxide (Pt/WO3/ASA) catalysts can be obtained with a self-assembly method, which are characterized with TEM and elemental mapping. The Pt nanoparticles first assembly with WO3 nanoparticles and the Pt/WO3 composite is then loaded on ASA to obtain the catalyst, in which catalyst Pt nanoparticles well combine with WO3 nanoparticles. The optimized catalyst 2Pt/10W/ASA exhibits best catalytic performance in the selective hydrogenolysis of glycerol; over the optimized catalyst, at the conversion of glycerol reach 70.7%, and the selectivity of 1,3-PDO can reach 43.6%. The loading percentages of Pt and types of the support are very important for the formation of 1,3-PDO. The NH3-TPD results reveal that the acidic sites in WO3 and ASA are very important for the conversion of glycrol and the production of 1,3-PDO.
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