焙烧温度对超细镍催化剂加氢脱芳活性的影响

Effect of Calcination Temperature on Performance of Ultrafine Nickel Catalyst for Hydrodearomatics

对原位溶胶-凝胶法制备的NiO-MoO3/SiO2-TiO2超细镍催化剂前体进行一组温度的焙烧及预处理,得到各温度条件下焙烧对该催化剂性能影响的数据。催化剂的加氢活性在程序升温还原法(TPR)研究与在航空煤油加氢脱芳烃实验中所得结果是一致的,即焙烧温度为480℃和600℃的催化剂加氢活性相对较高,在此温度区间或过高温度下焙烧得到的催化剂加氢活性相对较低。

Ultrafine nickel hydrogenation catalyst NiO- MoO3/SiO2 - TiO2 was prepared by in- situ solgel method, and the influence of process conditions on catalyst＇s performance was studied. Temperature programmed reduction （TPR） technique was used for studying ultrafine nickel hydrogenation catalyst NiO -MoO3/SiO2-TiO2 in this system. It was observed that the reduction behavior of catalysts was dependent on the calcination temperature of their precursors, and the higher ability of hydrogen uptakes has been obtained in the pretreatment of them at 480 ℃ and 600℃. The results of TPR analysis were consistent with the evaluation of catalytic activity in the hydrodearomatics of jet fuel.