关键词: 加氢脱硫, 催化剂, 催化剂活化, 络合剂, 活性相

Abstract: As a kind of commonly used organic additives，researchers pay close attention to chelating agents because of their promoting effect on catalytic performance. The effect of chelating agents on hydrogenation performance and sulfidation behavior of catalysts are reviewed. The effect of chelating agent on impregnation solution and catalytic activity are introduced，based on the different ways of impregnation，and the mechanisms of chelating agents are discussed. Overall，the addition of chelating agents could delay sulfidation of promoter Ni(Co) and decrease Mo(W) sulfidation temperature，so as to improve the sulfidation degree of Mo(W)，weaken the interaction between metals and supports and improve the dispersion of active components. All of above aspects result in increased hydrodesulfurization activity. Finally，research on the mechanisms and industrial catalysis of chelating agents modification are also prospected.

Key words: HDS, catalyst, catalyst activation, chelating ligands, active phase