关键词: 氧化铝, 加氢脱硫, 催化剂载体, 表面性质, 活性相

Abstract:

The development of high-performance catalysts is essential to improve the residue hydrogenation quality. In this review, the effects of alumina support and catalyst preparation method on the structure and stability of the active phase were introduced. Firstly, it discussed the influence of alumina surface properties (type and concentration of hydroxyl groups, surface-dependent orientation), crystal phase (γ-Al₂O₃, η-Al₂O₃, δ-Al₂O₃, θ-Al₂O₃, α-Al₂O₃), and pore structure (pore size distribution and specific surface area) on the metal-support interaction. Then, the modifications of hydroxyl, acid, and pore structure on alumina surface by hydrothermal treatment were analyzed. Subsequently, the effects of additives and sulphuration conditions on the structure of the active phase were outlined in catalyst preparation. Then the structure-activity relationship between active phase and catalytic performance was summarized. Finally, it pointed out the necessity to balance the large pore size and high mechanical strength, and to regulate the macroscopic distribution of active components on the support according to the specific demand. Moreover, the pore structure design of industrial catalysts and in situ characterization techniques should be considered in future researches.

Key words: alumina, HDS, catalyst support, surface property, active phase