Study on the performance of platinum and tungsten bifunctional catalyst supported on Al2O3 in the hydrogenolysis of glycerol to 1,3-propanediol

Abstract In this work, a rod-shaped Al2O3 with high specific surface area and rich in unsaturated pentahedral coordination Al3+ sites was synthesized by hydrothermal crystallization method, and the tungsten species was anchored on the surface of the Al2O3 support in the form of oligomeric nanoclusters using the incipient-wetness impregnation method. Then the platinum species were in close contact with the tungsten species in the form of small particle size and high dispersion through high temperature heat treatment. It greatly enhances the degree of interaction between platinum and tungsten species, is conducive to the generation of more active site structures, and significantly improves the catalytic activity of glycerol hydrogenolysis to 1,3-propanediol (1,3-PDO). In a fixed-bed reactor, when the reaction temperature is 160°C, the pressure is 5.0 MPa, and the 10% glycerol aqueous solution is continuously added, the catalytic reaction performance evaluation results show that the glycerol conversion of the Pt-WOx/Al2O3 catalyst is 75.2%, and the yield of 1,3-PDO reach 33.1%.