Coke oven gas can be upgraded through catalytic reforming using carbon dioxide as a soft oxidant. Herein, a customized Ni–MgO–Al₂O₃ catalyst for the carbon dioxide reforming of coke oven gas was developed by selecting an appropriate catalyst preparation method and further optimizing the key variable of the selected method. Catalysts were prepared by various methods including co-precipitation, incipient wetness impregnation, hydrothermal, co-impregnation, and sequential impregnation. Among them, the co-precipitated catalyst showed the best performance. As the key variable, the co-precipitated pH of the precursor solution was optimized as 12. The catalysts were characterized using X-ray diffraction, Brunauer–Emmet–Teller method, H₂–temperature-programmed reduction, H₂–chemisorption, and thermogravimetric analysis. The interaction between a complex NiO species and the support material showed a strong relationship with the number of Ni° active sites, which also has a direct connection with the activity of the catalyst. The developed catalyst successfully lowered the high H₂/CO ratio of coke oven gas from 7.00–1.66 through the carbon dioxide reforming reaction. Moreover, the catalytic activity was maintained over 50 h and thermodynamic equilibrium was achieved, even at a high gas hourly space velocity of 600,000 h⁻¹.

焦炉煤气可以通过使用二氧化碳作为软氧化剂的催化重整进行升级。在此，通过选择合适的催化剂制备方法并进一步优化所选方法的关键变量，开发了用于焦炉煤气二氧化碳重整的定制Ni-MgO-Al ₂ O ₃催化剂。通过多种方法制备催化剂，包括共沉淀，初期湿润浸渍，水热，共浸渍和顺序浸渍。其中，共沉淀催化剂表现出最佳性能。作为关键变量，前体溶液的共沉淀pH最优化为12。使用X射线衍射，Brunauer-Emmet-Teller方法，H ₂表征催化剂。-程序升温还原，H _2-化学吸附和热重分析。复杂的NiO物种与载体材料之间的相互作用与Ni°活性位点的数量密切相关，这也与催化剂的活性直接相关。经过开发的催化剂通过二氧化碳重整反应成功地将焦炉煤气的高H ₂ / CO比从7.00-1.66降低了。此外，即使在600,000 h ^-1的高气体时空速度下，催化活性也能保持50小时以上，并达到热力学平衡。