Wednesday, November 10, 2010
Hall 1 (Salt Palace Convention Center)
Glycerol is a by-product of biodiesel production. Many investigations have been carried out on glycerol conversion to valuable chemicals and fuels. In this work, hydrogen production from a glycerol solution by aqueous phase reforming process is studying by using catalysts over supported Ni catalysts, which are frequently modified by the addition of promoters such as Pt and Pd, in order to improve their stability and selectivity and the effect of metal loadings and operation conditions is examine. The purity as well as structure of the supported Ni, Pt and Pd catalysts is characterizing by XRD analysis. The surface area, morphology, metal reducibility, oxidation state of the Ni, Pt and Pd on supports is examined by BET, SEM and TPR respectively. Aqueous phase reforming of glycerol over supported nickel modified catalysts is investigating by using optimized reaction parameters such as catalytic reaction temperature (200 – 250C), liquid hourly space velocity (LHSV=3.0 – 10ml/h), pressure (10-30 bar) and feedstock concentration of the glycerol (5-15 wt %) for higher conversion, hydrogen yield and selectivity, lower CO production, higher CO2 production, stability on time-on-stream and less coke formation..