程序升温脱附法研究超细Mo/Al2O3催化剂

程序升温脱附法研究超细Ｍｏ／Ａｌ_２Ｏ_３催化剂张智敏，郝建刚，李耀龙（山西大学化学系，太原０３０００６）关键词超细粒子，氧化钼，氧化铝，负载型催化剂，程序升温脱附在催化领域中，对以ｙ－ＡＩ。Ｏ。为载体的Ｃｏ，Ｍｏ，Ｎｉ，Ｆｅ，Ｐｄ和Ａｇ等负载型催化剂...

STUDIES OF THE SUPERFINE MO/Al_2O_3 CATALYSTS WITH TEMPERATURE PROGRAMMED DESORPTION

he superfine Mo/Al2O3 catalysts were prepared, and their surfacestructure and properties were studied by XRD, TPR and TPD. XRD results showed that for superfine Mo/Al2O3 catalysts there were twostates of MoO3, one was ionic type compound Al2(MoO4)3 and anotherhighly and uniformly dispersed MoO3. Therefore, the interaction between superfine Al2O3 and highly dispersed MoO3, was greatly strengthened, and thus no in MoO3 phase appeared in the XRD pattern. Thestrong interaction between Al2O3 and MoO3 of superfine Mo/Al2O3 catalyst was also evidenced by TPR and TPD measurements. The activitiesof the catalysts for cyclohexene hydrogenation of the catalysts were determined. The results showed that the activities of superfine Mo/Al2O3were higher than that of ordinary ones and increased with the increasingof Mo content.