| 초록 |
The promotional effect of Ru on activity and stability of Ni/MgAl2O4 catalysts was investigated during steam reforming of methane (SRM). The Ru promoted Ni/MgAl2O4 catalysts with various amount of 01 wt% were prepared by stepwise impregnation and co-impregnation method by using hydrotalcite MgAl2O4 support. The catalysts were characterized by XRD, TPR, TEM and H2 pulse chemisorption. The Ru promoted Ni/MgAl2O4 catalysts exhibited high activity and stability in SRM without pre-reduction treatment compared to that of unprompted catalysts. In addition, the amount of 0.05 wt% Ru was sufficient to obtain equilibrium conversion without pre-reduction treatment. The effect of Ru promotion on Ni/MgAl2O4 is attributed to the decrease of reduction temperature of NiO species and eventually facilitate in-situ reduction at normal SRM operating conditions. |
