Enhanced catalytic upgrading of glycerol into high value-added H2 and propanediols: Recent developments and future perspectives

Abstract This paper is a review of the main scientific progresses achieved by the authors in the field of bioglycerol upgrading. Our research focused on the development of efficient precious and/or transition metals based γ-Al2O3 catalysts for the bioglycerol Aqueous Phase Reforming, Steam Reforming and Hydrogenolysis in order to selectively obtain high value-added H2 and/or propanediols. For each of the three conversion processes, using state-of-the art synthesis methods, characterization techniques, and kinetic and mechanistic studies, we obtained a better understanding of the structure-activity relationships of the developed systems. Special emphasis was placed on the identification of the active species, the synergy between the different functionalities, and the main factors causing deactivation. This information allowed us improving the catalytic performance, in terms of activity, selective and long-term stability. Moreover, our results and conclusions are contrasted with current state-of-the art, and the perspectives for further developments are addressed.