| 초록 |
The effect of time on stream, GHSV and temperature on the steam reforming of LPG over Ni-based oxide catalysts for hydrogen station and fuel processor applications was investigated. The supported nickel catalysts (12wt% Ni/S, S=Al2O3, MgO and CeO2) were prepared by impregnation method and characterized by N2 physisoprtion, CO chemisorption, XRD, SEM, TEM, TPR. Although BET surface area of Ni/Al2O3 catalyst was higher than that of the other catalysts, the H2 yield over Ni/MgO catalyst was higher than that of the other catalysts under the tested conditions. For the steam reforming of LPG, catalytic deactivation over Ni/MgO was hardly observed for 90h under S/C = 2.0 and GHSV = 20,000h-1. It was also observed that little changes in the X-ray diffraction patterns of the Ni/MgO catalysts before and after the reaction but nickel carbide (NiC) phase over Ni/Al2O3 catalyst after the reaction was confirmed. It was suggested that Ni/MgO catalyst is a promising candidate for the production of hydrogen by the steam reforming of LPG. |
