关键词: Ni/Y, 负载量, 临氢再生, 分散性

Abstract:

A series of Ni/Y catalysts were prepared using incipient impregnation method. The effect of Ni loading on the microstructure and activity of the catalysts were investigated by the means of BET, XRD, NMR, and TEM. The results showed that the crystallinity, specific surface area, pore volume and the amount of Br?nsted type acid all decreases with increasing amount of Ni loading, but the hydrogenative regeneration activity of catalysts first increases then decreases with increasing amount of Ni loading. 2Ni/Y with 2.0% Ni loading has the best hydrogenative regeneration activity, which can regenerate 92.8% catalyst life. This mainly because that Ni is the active center of hydrogenation, the number of Ni active site increases with increasing Ni loading, but Ni dispersion decreases when Ni loading is too large, and the number of Ni active site decreases, thus hydrogenative regeneration activity of the catalysts would decrease.

Key words: Ni/Y, active mental loading, hydrogenative regeneration activity, dispersion