(744a) Aqueous Phase Reforming of Glycerol: Determining the Catalyst Support Effects
A goal of this effort is to learn how these supported catalysts behave in aqueous environments at specific reaction conditions. This knowledge is crucial to developing an understanding of the reaction mechanism and will aid in our design of new catalysts that have greater efficiency and selectivity. It is also important to understand how the catalyst support participates in the reactions, this could include enhancing dehydrogenation and water-gas shift reactions, and determine support effects of various supports on the glycerol APR reactions and how they influence the overall catalytic activity and product distribution. To quantify these effects for various supports, we measured the presence of BrÃ¸nsted and Lewis acid/base surface sites, which promote select APR reaction steps and control the hydrophobicity/hydrophilicity of the catalyst due to the presence of H+ and OH- ions. These characterizing factors affect the water solventâs interaction with the catalyst support as well as the availability of active sites and the propensity of the catalyst to deactivate due to support changes at the desired conditions. Catalysts were characterized by various methods including, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), thermogravimetric analysis (TGA), and temperature-programmed reduction/desorption (TPR/TPD). Results from these characterization methods as well as product distributions from catalytic experiments provided key insights into the primary factors impacting catalyst performance.