A study of Ti-promoted sulfur-tolerant Co-Mo catalyst for water gas shift reaction

A series of sulfur-tolerant Co-Mo/MgO-Al2O3-TiO2 catalysts promoted by TiO were prepared by kneading method and characterized by temperature-programme d reduction, temperature-programmed sulfurization and in-situ infrared spec troscopy. The catalyst activity for water gas shift reaction was tested und er atmosphere in an ordinary tubular reactor. The results indicate that TiO 2 promotes the activity of Co-Mo/MgO-Al2O3-TiO2 catalyst and decreases the reducing and sulfurizing temperature by changing interaction between active composition and carrier. In-situ infra-red spectra show that TiO2 decrease s the saturation level of active Mo and increases the coordinate capacity o f active Mo with CO.