Mixed oxide catalysts with various compositions, such as X wt % Ni/MgO (X = 15, 25) and 25 wt % Ni/MgO–ZrO2, with molar ratios between Mg and Zr (Mg : Zr =1 : 1), were prepared through the impregnation method. The MgO–ZrO2 composite was prepared using the sol-gel method. Subsequently, our solids were subjected to calcination at 900°C and evaluated for their performance in the catalytic reforming of methane. The crystalline structure and catalytic properties of these catalysts were assessed using techniques including X-ray diffraction (XRD), temperature programmed reduction (TPR), scanning and transmission electron microscopy (SEM), as well as N2 adsorption-desorption measurements and temperature programmed oxidation (TPO). We focused our investigation on the impact of different nickel loadings and the effect of ZrO2 as a promoter on the catalytic properties of Ni/MgO supports on the process of dry reforming of methane (DRM) at a temperature of 750°C. The catalysts prepared with 15% Ni/MgO and 25% Ni/MgO–ZrO2 (1 1) systems exhibited high catalytic performances and high coke resistance. No deactivation was observed after 5 h of reaction.
Ikkour et al. (Sun,) studied this question.