负载型磷化钼加氢精制催化剂制备的研究

A series of MoP/γAl2O3 catalysts with MoP loadings of 5%~20% were prepared by direct reduction of the corresponding molybdenum phosphate precursors. Different preparation methods were considered to 20% MoP/γAl2O3. The catalysts prepared were characterized by XRD and TGDTG. The catalytic activity was tested in a continuous flow type microreactor at 340℃, 370℃and 3.0MPa. A liquid containing thiophene, pyridine, cyclohexene was used as the model compounds. The results indicate that the active species of supported catalysts are dispersed well on the surface of the supporters, the weight loss of supported catalysts in TGDTG analysis occurs earlier than unsupported ones. It is found that supported MoP is much more active than unsupported ones and it could maintain higher HYD conversions without loss of HDN activity. The 13% of MoP loading catalyst was most active, the conversion of pyridine, thiophene and cyclehexene could reach 99.15%, 98.23% and 100% respectively. The preparation method that γAl2O3 was added in at the same time is better than other methods.