关键词: 非晶态Ni-P催化剂, Mo改性, 硝基苯, 加氢, 苯胺

Abstract: The process of nitrobenzene hydrogenation to aniline using an amorphous Ni-Mo-P alloy as the catalyst and the deactivation mechanism of the amorphous Ni-Mo-P alloy catalyst were studied. Investigation of the effects of reaction time,temperature,and hydrogen pressure on nitrobenzene hydrogenation to aniline using the Ni-Mo-P catalyst revealed optimum conditions as 90 min,383 K,and 1.8 MPa.Under these conditions,the yield of aniline reached 98.2% using the amorphous Ni-Mo-P catalyst after nitrobenzene hydrogenation for 15 h,indicating excellent activity stability of the amorphous Ni-Mo-P catalyst.Deactivation of the amorphous Ni-Mo-P catalyst was due mainly to nitrobenzene hydrogenation byproducts covering the catalyst activity sites,which made it difficult for reactant molecules to access the catalyst activity sites and was highly unfavorable to the catalytic reaction.

Key words: amorphous Ni-P catalyst, Mo modification, nitrobenzene, hydrogenation, aniline