Catalysts, including (10% Ni)/AMHA, (10% Ni + 5% Co)/AMHA, (5% Ni + 5% Co)/AMHA, and (5% Ni + 10% Co)/AMHA, were prepared by simultaneous impregnation of Ni and Co on alkaline molten halloysite (AMHA) and characterized by X-ray diffraction (XRD), field diffusion scanning electron microscopy (FESEM), temperature-programmed reduction (TPR), temperature-programmed oxidation (TPO), transmission electron microscopy (TEM), Fourier transform infrared (FTIR), atomic force microscopy (AFM), and Brunauer–Emmett–Teller (BET). The catalysts were evaluated in dry reforming of methane (DRM) at temperatures of 700 to 850°C and with a volumetric composition of a feed gas of 40% CH₄, 40% CO₂, and 20% Ar in a fixed bed reactor. Catalyst performance tests showed that the nickel catalyst based on milled and alkaline molten nano-halloysite had a relatively poor performance. After impregnation of cobalt metal with different concentrations in the presence of nickel, the functional properties increased. Characteristic observations and experiments showed a very positive effect of cobalt metal on the catalyst performance. The presence of cobalt reinforcing metal along with nickel improves the activity and stability and reduces catalyst coking. Moreover, increasing cobalt along with nickel leads to better dispersion of the active phase of nickel, improved catalyst regeneration, and stable production of synthetic gas from methane and carbon dioxide. The effect of cobalt and nickel ratio on the catalyst structure, conversion rate of methane and carbon dioxide, stability, and carbon deposition rate were investigated. The conversion rate increases at high temperatures. Also, the resulting gas composition is suitable for Fischer–Tropsch reactions.

中文翻译：

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碱熔法改性埃洛石纳米粘土镍钴双金属催化剂干式甲烷重整

制备催化剂，包括 (10% Ni)/AMHA、(10% Ni + 5% Co)/AMHA、(5% Ni + 5% Co)/AMHA 和 (5% Ni + 10% Co)/AMHA通过在碱性熔融埃洛石 (AMHA) 上同时浸渍 Ni 和 Co，并通过 X 射线衍射 (XRD)、场扩散扫描电子显微镜 (FESEM)、程序升温还原 (TPR)、程序升温氧化 (TPO) 表征，透射电子显微镜 (TEM)、傅里叶变换红外 (FTIR)、原子力显微镜 (AFM) 和 Brunauer-Emmett-Teller (BET)。在 700 至 850°C 的温度和 40% CH ₄、40% CO ₂的进料气的体积组成下，在甲烷干重整 (DRM) 中对催化剂进行了评估, 和 20% Ar 在固定床反应器中。催化剂性能测试表明，基于研磨和碱性熔融纳米埃洛石的镍催化剂的性能相对较差。在镍的存在下浸渍不同浓度的钴金属后，功能特性增加。特征观察和实验表明钴金属对催化剂性能有非常积极的影响。钴增强金属与镍的存在提高了活性和稳定性并减少了催化剂焦化。此外，增加钴和镍会导致镍活性相的更好分散，改善催化剂再生，以及从甲烷和二氧化碳稳定生产合成气。钴镍配比对催化剂结构的影响，研究了甲烷和二氧化碳的转化率、稳定性和积碳率。转化率在高温下增加。此外，所得气体成分适用于费-托反应。