Renewable hydrogen generation by steam reforming of glycerol over zirconia promoted ceria supported catalyst
2011
Dave, Chirag D. | Pant, K.K.
The study focuses on hydrogen production from steam reforming of glycerol over nickel based catalyst promoted by zirconia and supported over ceria. Catalyst was prepared by the wet-impregnation method and characterized by BET surface area analysis, X-ray diffraction technique and scanning electron microscopy (SEM) analysis. The performance of the catalyst was evaluated in terms of hydrogen yield, selectivity and glycerol conversion at 700°C in a tubular fixed bed reactor. The effect of glycerol concentration in feed, space time (W/FAO), temperature and time on stream (TOS) was analyzed for the catalyst Ni–ZrO₂/CeO₂ which showed the complete conversion of glycerol and high H₂ yield that corresponds to 3.95mol of H₂ out of 7mol. Thermodynamic analysis was also carried out using Aspen HYSYS for system having glycerol concentration 10wt% and 20wt% and experimental results were compared with thermodynamics. Kinetic study was carried out for the steam reforming of glycerol over Ni–ZrO₂/CeO₂ catalyst using the power law model. The values of activation energy and order of reaction were found to be 43.4kJ/mol and 0.3 respectively.
显示更多 [+] 显示较少 [-]