关键词: 助剂, 螯合剂, 加氢脱硫, 催化剂, 选择性

Abstract: A series of Co-Mo hydrodesulfurization catalysts using TiO2-Al2O3 support was prepared adding P additive and nitrilotriacetic acid (NTA) chelate, respectively. These catalysts were characterized by nitrogen adsorption-desorption, TPR and SEM techniques. The effect of P and NTA on the catalytic performance of these catalysts was evaluated using heavy FCC naphtha as feed. Results showed that adding a suitable amount of P and NTA during catalyst preparation could significantly improve the dispersion of activated metals on the catalyst support; the existence of NTA could weaken the interaction between support and active components, and that would be helpful for the reduction of active components, thus the hydrodesulfurization activity and selectivity of the catalyst was improved.

Key words: additive, chelating agent, hydrodesulfurization, catalyst, selectivity