Ceria zirconia Ni-based catalysts with different particle sizes varying from 30 to 500 μm were prepared, characterized by SEM, XRD, BET, TPR and TPD, and then tested in CO₂ methanation in a thermal-catalysis system and a plasma-catalytic system. Different experimental parameters such as chemical and physical ones were also studied. The influence of catalyst size was first studied. It was found that catalyst presenting bigger particle size (grain size) led to higher CO₂ conversion in both processes due to a smaller metallic Ni particle size, the less gas maldistribution and better plasma homogeneity. Moreover, a pressure-drop was created in the reactor to investigate the influence of pressure on the plasma process. It should be noted that by increasing the pressure drop of the reactor in the plasma-catalytic process, a slight increase of CO₂ conversion was observed while the plasma power decreased by 30%.

制备了粒径介于30至500μm之间的氧化铈氧化锆Ni基催化剂，通过SEM，XRD，BET，TPR和TPD对其进行表征，然后在热催化系统和等离子催化系统中进行CO ₂甲烷化测试。。还研究了不同的实验参数，例如化学和物理参数。首先研究了催化剂尺寸的影响。发现具有更大粒度（粒度）的催化剂导致更高的CO _2。由于较小的金属Ni粒径，较少的气体分布不均和较好的等离子体均质性，两种方法都能实现转化。此外，在反应器中产生了一个压降，以研究压力对等离子体工艺的影响。应当注意，通过在等离子体催化过程中增加反应器的压降，观察到CO ₂转化率略有增加，而等离子体功率降低了30％。