Abstract A series of ZrO2 supports were treated by ammonia solution with different reflux digestion time, and loaded 25 wt% MoO3 for sulfur-resistant CO methanation reaction by incipient-wetness impregnation method. The MoO3/ZrO2 catalysts were also characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), infrared spectra of adsorbed pyridine (Py-IR). Compared to the undigested ZrO2, ZrO2 with reflux digestion in ammonia solution could achieve more oxygen vacancies, less Lewis acidic sites, smaller crystalline MoO3 and more amount of active sites. Generally, when the support reflux digested in ammonia solution exceed 12 h, the CO conversion of digested catalysts Mo/A-ZrO2-xh reached 60%, while the CO conversion of undigested catalysts was just 36% at the same reaction condition.

中文翻译：

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回流消化时间对抗硫CO甲烷化MoO3/ZrO2催化剂的影响

摘要 采用不同回流消化时间的氨溶液对一系列ZrO2载体进行处理，负载25wt%的MoO3，采用初湿浸渍法进行抗硫CO甲烷化反应。MoO3/ZrO2 催化剂还通过 X 射线衍射 (XRD)、X 射线光电子能谱 (XPS)、透射电子显微镜 (TEM)、吸附吡啶的红外光谱 (Py-IR) 进行了表征。与未消化的 ZrO2 相比，在氨溶液中回流消化的 ZrO2 可以获得更多的氧空位、更少的路易斯酸性位点、更小的结晶 MoO3 和更多的活性位点。一般情况下，当载体在氨溶液中回流消化超过 12 h 时，消化催化剂 Mo/A-ZrO2-xh 的 CO 转化率达到 60%，而未消化催化剂在相同反应条件下的 CO 转化率仅为 36%。