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Abstract <p>Mixed oxide catalysts with various compositions, such as <i>X</i> wt % Ni/MgO (<i>X</i> = 15, 25) and 25 wt % Ni/MgO–ZrO<sub>2</sub>, with molar ratios between Mg and Zr (Mg : Zr =1 : 1), were prepared through the impregnation method. The MgO–ZrO<sub>2</sub> 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 N<sub>2</sub> adsorption-desorption measurements and temperature programmed oxidation (TPO). We focused our investigation on the impact of different nickel loadings and the effect of ZrO<sub>2</sub> 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–ZrO<sub>2</sub> (1 1) systems exhibited high catalytic performances and high coke resistance. No deactivation was observed after 5 h of reaction.</p>

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Dry Reforming of Methane over Ni/MgO and Ni/MgO–ZrO2 Catalysts

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Kahina Ikkour,
  • Nora Yahi,
  • Lamine Aoudjit,
  • Djamila Sellam,
  • Assia Bessi,
  • Saliha Menad

摘要

Abstract

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.