Selective Hydrogenation of Acetylene over a MoP Catalyst

A MoP catalyst was prepared by high temperature hydrogen reduction. Its properties were investigated by X-ray diffraction and in-situ X-ray photoelectron spectroscopy. It was used for the selective catalytic hydrogenation of acetylene. The results indicated that MoP is formed by hydrogen reduction at 650 °C. The prepared MoP catalyst contained high valence molybdenum and phosphorus species. The catalyst is a bifunctional catalyst, which includes a hydrogenation center and an electron-deficient center. Ethylene selectivity can exceed 73% when the acetylene conversion is higher than 99%.

摘要：通过高温还原法制得磷化钼 (MoP) 催化剂, 采用 X 射线衍射和原位 X 射线光电子能谱对其进行了表征, 并考察其催化乙炔选择性加氢性能. 结果表明, 在 650 ºC 经 H2 还原制得的催化剂中形成了大量的低价态物种 MoP, 但仍含有大量的高价态 Mo 和 P 物种, 该催化剂具有加氢活性中心和缺电子中心双重功能, 在乙炔选择性加氢反应中, 乙炔转化率超过 99% 时, 乙烯选择性仍能保持在 73% 以上. 

H2 molecules can be activated by a MoP catalyst to form active hydrogen species, which can obtain the supplement from the gas phase hydrogen by hydrides in the bulk of MoP catalyst. Ethylene selectivity can exceed 73% when the acetylene conversion is higher than 99%.Figure optionsDownload as PowerPoint slide