A comparative study of the GSR performance for Ni/CaO-MgO-Al₂O₃ and Ni/Al₂O₃ catalysts is reported. Catalysts were synthesized applying the wet impregnation method at a constant metal loading (8 wt %). Synthesized samples were characterized by N₂ adsorption/desorption, ICP, BET, XRD, NH₃-TPD, CO₂-TPD, H₂-TPR, XPS, TEM, STEM-HAADF and EDS. The carbon deposited on their surface under reaction conditions was characterized by TPO, Raman and TEM. It was proven that the use of CaO-MgO as alumina modifiers leads to smaller nickel species crystallite size, increased basicity and surface amount of Ni⁰ phase. Thus, it increases the conversion to gaseous products favoring H₂ and CO₂ production to the detriment of CO formation, by enhancing the water gas-shift (WGS) reaction. No liquid products were produced by the Ni/modAl catalyst over 550 °C, whereas time on stream results confirmed that deactivation can be prevented, as apart from decreasing the amount of coke deposition the nature of carbon was altered towards less graphitic and more defective structures.

报道了对Ni / CaO-MgO-Al ₂ O ₃和Ni / Al ₂ O ₃催化剂的GSR性能的比较研究。应用湿式浸渍法以恒定的金属负载量（8重量％）合成催化剂。通过N ₂吸附/解吸，ICP，BET，XRD，NH ₃ -TPD，CO ₂ -TPD，H ₂ -TPR，XPS，TEM，STEM-HAADF和EDS对合成样品进行表征。通过TPO，拉曼和TEM对在反应条件下沉积在其表面上的碳进行了表征。事实证明，使用CaO-MgO作为氧化铝改性剂可导致较小的镍物种微晶尺寸，增加的碱度和Ni ^0的表面量阶段。因此，通过增强水煤气变换（WGS）反应，它增加了转化为有利于H ₂和CO ₂产生的气体产物的转化，从而不利于CO的形成。Ni / modAl催化剂在550°C以上不会产生液体产物，而运行时间的结果证实了可以防止失活，除了减少焦炭沉积量外，碳的性质还朝着石墨含量降低和结构缺陷较多的方向转变。 。