氧化钼对氧化钒催化剂的影响

The Influence of Molybdenum Oxide on Vanadium Pentoxide Catalyst

本文运用集团结构适应理论,结合测定磁化率和不可逆吸附量,以及连续流动法和脉冲法等实验手段,研究MoO_(3)对V_(2)O_(5)/SiO_(2)催化剂的影响。结果表明MoO_(3)增加V_(2)O_(5)表面V4+浓度,提高双V4+集团形成概率。从而提高催化剂恢复氧的能力,促进供氧活性。还讨论了MoO_(3)和P3O5对V3O5催化剂影响的差异。

In this paper the differences between V_(2)O_(5)/SiO_(2) and V_(2)O_(5)-MoO_(3)/SiO_(2) in activity of providing activated oxygen and the numbers and distribution of V4+ cations were investigated by measuring magnetic susceptibilities and irreversible adsorption amounts of catalysts and testing the catalytic activity with the flowing method.The different catalytic properties for hydrogenation of cyclohcxene and dehydrogenation of cyclohexane were discussed also.The information was drawn by the view point of the theory of corresponding structure of surface groups of catalyst.The results indicate that promoter MoO_(3) increases the activity of providing oxygen,and the numbers of V4+ cation of V_(2)O_(5)-based catalyst and the probability of forming V4+ cation groups.The different influece on V_(2)O_(5)-based catalst by MoO_(3) and P2O5 was also discussed.