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考察了Mo基耐硫甲烷化催化剂中Mo负载量的影响.结果表明,MoO3的最佳负载量为其单层饱和负载量,大于此负载量后催化剂表面将出现MoO3晶型和颗粒团聚现象,这导致了其甲烷化活性降低.助剂CoO的添加会抑制Mo基催化剂的甲烷化活性,主要原因是生成了钼酸钴晶相,使得甲烷化活性位减少,从而导致了甲烷化活性的降低.实验结果为耐硫甲烷化催化剂设计提供了重要依据.
The effect of Mo loading on the Mo-based sulfur tolerant methanation catalyst was investigated.The results show that the optimal loading of MoO3 is its monolayer saturated loading, and the MoO3 crystal and particle agglomeration will appear on the surface of the catalyst when the loading is higher than that of MoO3. Which led to the reduction of its methanation activity.The addition of CoO as a promoter inhibited the methanation activity of the Mo-based catalyst mainly due to the formation of the cobalt molybdate crystal phase, which reduced the methanation activity and led to the decrease of methanation activity The experimental results provide an important basis for designing the desulfurization methanation catalyst.