We prepared a series of alkali (Na and K) and alkaline earth metal (Ca and Ba) promoted Co/CeO₂ catalysts to investigate the effect of the promoter on the catalytic performance of the catalyst in the high-temperature water-gas shift (WGS) reaction of waste derived synthesis gas. Interestingly, alkali metal promoted catalysts deactivated rapidly compared to alkaline earth metal promoted catalysts. Alkaline earth metal promoted catalysts showed relatively higher stability (> 50 h) even at a very high gas hourly space velocity of 143,000 h⁻¹. X − ray diffraction (XRD) and transmission electron microscopy (TEM) results reveal that the higher stability of the alkaline earth metal promoted catalysts was due to the strong resistance to sintering, showing a relatively small crystallite size of metallic cobalt compared to the alkali metal promoted catalysts after WGS reaction.

我们制备了一系列碱金属（Na和K）和碱土金属（Ca和Ba）促进的Co / CeO ₂催化剂，以研究促进剂对催化剂在高温水煤气变换中的催化性能的影响（ WGS）反应产生的废合成气。有趣的是，与碱土金属促进的催化剂相比，碱金属促进的催化剂迅速失活。碱土金属促进的催化剂即使在143,000 h ^-1的非常高的气体时空速度下也显示出相对较高的稳定性（> 50 h）。X-射线衍射（XRD）和透射电子显微镜（TEM）结果表明，碱土金属助催化剂的较高稳定性归因于强大的抗烧结性，与碱金属相比，金属钴的微晶尺寸较小WGS反应后促进催化剂。