燃料油深度加氢脱硫催化剂的研究进展

综述了燃料油(主要是汽油和柴油)深度加氢脱硫催化剂的研究进展。汽油精制的主要问题是在深度加氢脱硫的同时减少由于烯烃饱和造成的辛烷值损失;柴油深度加氢脱硫主要是脱除其中的难脱除硫化物及稠环芳烃加氢饱和。TiO_2和 ZrO_2等载体负载的金属硫化物催化剂比传统加氢脱硫催化剂的活性高。助剂 P 和 F 能减弱载体-金属间相互作用,在 Co(Ni)-Mo(W)/γ-Al_2O_3催化剂中生成更多的高活性Ⅱ型中心。螯合剂能延迟 Co 的硫化,有利于 Co-Mo-S 活性中心的生成。过渡金属磷化物催化剂表现出更高的脱硫、脱氮活性及良好的活性稳定性,它的主要缺点是金属磷化物的分散度较差,活性中心数目较少。过渡金属碳化物和氮化物催化剂对脱硫、脱氮的初活性较高,但使用后表面金属被硫化,催化活性下降。

Progress of Catalysts for Deep Hydrodesulfurization of Fuels

Development of catalysts for deep hydrodesulfurization(HDS) of gasoline and diesel oil were reviewed.Main challenge for HDS of gasoline is to minimize sulfur content and octane number loss due to saturation of olefins.Main tasks of hydroprocessing of diesel are removal of refractory organic sulfides such as 4,6-dimethyldibenzothiophene and hydrogenation of polyaromatics to enhance cetane number.Sulfide catalysts supported on TiO_2 and ZrO_2 with high surface area exhibited higher HDS activity than tradition...