采用程序升温还原法对一系列具有相同W含量和不同Ni含量的硫化态NiW /Al2 O3 催化剂进行了表征 ,以考察催化剂中不同硫物种的数量及还原性能 .结果表明 ,含有助剂Ni的催化剂的TPR谱在 6 73～ 873K出现了一个还原峰 ,归属为催化剂的NiWS混合相被分解生成的硫化镍物种的还原 .随着助剂Ni含量的增加 ,与该还原峰相应的H2 S生成量增大 ,表明形成了更多的NiWS活性相 .另外 ,Ni/ (Ni+W )原子比为 0 4 1的催化剂样品的噻吩加氢脱硫活性随着还原温度的升高而急剧下降 ,证实了催化剂在还原过程中活性相被逐步分解 . A series of sulfided NiW / Al 2 O 3 catalysts with the same W content and different Ni contents were characterized by temperature-programmed reduction method to investigate the quantity and reduction performance of different sulfur species in the catalyst.The results showed that the catalyst containing Ni TPR spectra showed a reduction peak at 673 ~ 873K and the reduction of nickel sulfide species decomposed by the NiWS mixed phase belonging to the catalyst.With the increase of Ni content, the amount of H2S generated corresponding to the reduction peak , Indicating that more NiWS active phases were formed.Furthermore, the thiophene hydrodesulfurization activity of the catalyst samples with a Ni / (Ni + W) atomic ratio of 0 4 1 decreased sharply with the increase of the reduction temperature, The active phase of the catalyst is gradually decomposed during the reduction.