Hydrogen Production by Ethanol Steam Reforming (ESR) over CeO2 Supported Transition Metal (Fe, Co, Ni, Cu) Catalysts: Insight into the Structure-Activity Relationship

摘要: The aim of the present work was to investigate steam reforming ethanol with regard H2 production over transition metal catalysts supported on CeO2. Various parameters concerning effect temperature (400–800 °C), steam-to-carbon (S/C) feed ratio (0.5, 1.5, 3, 6), entity (Fe, Co, Ni, Cu) and loading (15–30 wt.%) catalytic performance, were thoroughly studied. optimal performance obtained for 20 wt.% Co/CeO2 catalyst, achieving a yield up 66% at 400 °C. In addition, catalyst demonstrated excellent stability in whole examined range 400–800 contrast, notable degradation, especially low temperatures, observed Ni-, Cu-, Fe-based catalysts, ascribed mainly carbon deposition. An extensive characterization study, involving N2 adsorption-desorption (BET), X-ray diffraction (XRD), Scanning Electron Microscopy (SEM/EDS), Photoelectron Spectroscopy (XPS), Temperature Programmed Reduction (H2-TPR) undertaken gain insight into structure-activity correlation. could be attributed their intrinsic reactivity towards combination high surface oxygen concentration, which hinders deposition carbonaceous species.