摘要：
Using Ni,Mo,W as active components supported by TiO2-AlOOH carriers,we prepared hydrodesulfurization (HDS) slurry catalysts with a complete liquid-phase method.P was added as an auxiliary agent and the effect of P on the catalyst structure and performance of the slurry catalysts were studied.The catalysts were characterized by XRD,BET,NH3-TPD,XPS.The results revealed that catalysts synthesized by the complete liquid phase method had large specific surface areas,large pore diameters and large pore volumes,and all these characteristics could be further increased with the addition of P.The diesel HDS assessment results revealed that when the mass fraction of P was increased to 1％,the catalyst had the best HDS activity,which can remove the sulfur mass fraction of diesel to a level lower than 10 μg/g,and the desulfurization rate can increase up to 97.9％.P interacted with AlOOH and AlPO4 emerged,thus the surface acidity was increased.P can reduce the interaction of carriers and active components,which contributes to the improvement of sulfidition of active phases and the performance of HDS.%采用完全液相法制备了以TiO2-AlOOH为载体,Ni、Mo、W为活性组分的加氢脱硫(HDS)浆状催化剂,主要考察了P助剂的添加对催化剂结构与性能的影响.并利用XRD、BET、NH3-TPD、XPS等技术对催化剂进行表征.结果表明,完全液相法制备的催化剂具有较大的比表面积及孔径、孔容;且在添加P后,催化剂比表面积及孔径、孔容均有较大幅度的增加.柴油的脱硫性能评价结果表明,当助剂P的添加质量分数为1％时,催化剂具有最佳的脱硫活性,可将柴油的硫质量分数降到10 μg/g以下,脱硫率高达97.9％.分析表明,P与载体AlOOH作用,产生了AlPO4结构相,从而使催化剂表面的酸量增加;助剂P的添加,显著降低了催化剂活性相与载体的结合能,使得载体与活性相的相互作用降低,有助于活性相硫化程度的提高,进而有助于HDS效果的提升.
