Ni（Co,P,V）WNx/TiO2-γ-Al2O3 catalysts were synthesized by nitriding with N2-H2 mixture in the process of temperature programmed reduction.Nitrogen adsorption,temperature-programmed desorption of ammonia（NH3-TPD）,TG-DTA and XPS techniques were employed to analyze the natures of the catalysts.The results show that the reduction-nitriding of the precursors of Ni（Co,P,V）WNx/TiO2-γ-Al2O3 catalysts can be carried out more easily than that of WNx/TiO2-γ-Al2O3 catalyst,and the BET surface areas and acid amounts of Ni（Co,P,V）WNx/TiO2-γ-Al2O3 catalysts are smaller than those of WNx/TiO2-γ-Al2O3 catalyst.Among the Ni（Co,P,V）WNx/TiO2-γ-Al2O3 catalysts,the BET surface area and acid amount of the NiWNx/TiO2-γ-Al2O3 catalyst are relatively larger,and the precursor of the NiWNx/TiO2-γ-Al2O3 catalyst is most easily reduced and nitrided.In addition,the addition of additive Ni is more conducive to the stability of active W species on the WNx/TiO2-γ-Al2O3 catalyst.At last,the activities of thiophene hydrodesulphuriza-tion（HDS） over the catalysts were evaluated.The results show that the addition of additives can promote the activities of thiophene HDS over the WNx/TiO2-γ-Al2O3 catalyst,and the NiWNx/TiO2-γ-Al2O3 catalyst has a higher activity of thiophene HDS.%在H2和N2混合气中,采用程序升温还原氮化反应的方法,合成了分别含有助剂Ni,Co,P或V的WNx/TiO2-γ-Al2O3催化剂.通过低温氮物理吸附、氨程序升温脱附、TG-DTA和X光电子能谱技术对所合成的催化剂进行了表征.实验结果表明,4种助剂的引入分别使WNx/TiO2-γ-Al2O3催化剂前驱体更易于还原氮化以及比表面积和酸量减小.其中NiWNx/TiO2-γ-Al2O3催化剂的比表面积和酸量减小幅度相对较小,其前驱体最易被还原氮化,而且助剂Ni更有利于活性钨物种的稳定存在.同时,利用噻吩加氢脱硫
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