The Development Of Pt/Wox/Al2o3 For 1,3-Propanediol Production From Glycerol

Abstract

In this work, the researcher studied the hydrogenolysis of glycerol to 1,3-propanediol, by compared the catalytic activity between AlOOH (boehmite) and g-Al2O3. The catalysts were prepared by wet impregnation method. To investigate the properties, catalysts were characterized by XRD, XPS, BET, H2-TPR, H2-TPD, H2-TPR, SEM-EDX, Py-IR, NH3-IR, and XAS. The type of support showed to be of significance in deciding the activity and the selectivity to 1,3-propanediol. It was found that 2%Pt/WOx/g-Al2O3 gave higher activity and selectivity of 1,3-propanediol, which due to a large amount of active site and Brønsted acid site in the catalyst. The effects of H2 pressure, %Pt loading and WOx content were also examined. Furthermore, the researcher has investigated the effect of pretreated catalyst to catalytic activity. The reduced catalysts showed the decline in Pt dispersion and Brønsted acid site led to the decreasing of glycerol conversion and selectivity of 1,3-propanediol. So the concentration of Brønsted acid sites presented as a main to the selective production of 1,3-propanediol from glycerol hydrogenolysis.