Ni-based catalysts supported on sol-gel prepared Pr-doped CeO₂ with varied porosity and nanostructure were tested for the CO₂ methanation reaction. It was found that the use of ethylene glycol in the absence of H₂O during a modified Pechini synthesis led to a metal oxide support with larger pore size and volume, which was conducive toward the deposition of medium-sized Ni nanoparticles confined into the nanoporous structure. The high Ni dispersion and availability of surface defects and basic sites acted to greatly improve the catalyst’s activity. CFD simulations were used to theoretically predict the catalytic performance given the reactor geometry, whereas COMSOL and ASPEN software were employed to design the models. Both modelling approaches (CFD and process simulation) showed a good validation with the experimental results and therefore confirm their ability for applications related to the prediction of the CO₂ methanation behaviour.

测试了负载在溶胶-凝胶制备的具有不同孔隙率和纳米结构的Pr 掺杂 CeO ₂上的 Ni 基催化剂用于 CO ₂甲烷化反应。_{发现在没有 H 2}的情况下使用乙二醇在改进的 Pechini 合成过程中，O 产生了具有更大孔径和体积的金属氧化物载体，这有利于将中等尺寸的 Ni 纳米颗粒沉积在纳米多孔结构中。Ni的高分散性和表面缺陷和碱性位点的可用性大大提高了催化剂的活性。在给定反应器几何形状的情况下，CFD 模拟用于理论上预测催化性能，而 COMSOL 和 ASPEN 软件用于设计模型。两种建模方法（CFD 和过程模拟）都显示了对实验结果的良好验证，因此证实了它们在与预测 CO ₂甲烷化行为相关的应用中的能力。