Abstract:

The hydrodenitrogenation(HDN) performance improvement is the crucial factor but also the difficulty in the development of hydrotreating catalyst for inferior gas oil, while catalyst support preparation and modification technology are the core of obtaining high-performance hydrotreating catalyst for inferior gas oil. To deal with the issue of large pore size distribution of conventional Al₂O₃, which is not conducive to the diffusion of reactants and the improvement of specific surface area, the preparation methods (sol-gel method, precipitation method, hydrothermal synthesis method) and their advantages and defects of homogeneous mesoporous Al₂O₃(MA) support were introduced. In order to improve the catalyst hydrodenitrogenation activity, the promoters (phosphorus, boron, fluorine) modification, composite oxides (TiO₂-Al₂O₃, SiO₂-Al₂O₃) modification and composite modification on Al₂O₃ support in recent years were reviewed. The changes of support acidity and interaction with active phases after modification and their effect on catalyst hydrodenitrogenation performance were analyzed. Future research should focus on the homogeneous mesoporous Al₂O₃ support and composite modification, with a view to obtain high activity hydrodenitrogenation catalyst for inferior gas oil.

Key words: hydrogenation, catalyst, inferior gas oil, alumina, preparation method, reactivity, modification

摘要：

提高加氢脱氮（HDN）性能是劣质蜡油加氢处理催化剂开发的关键和难点，而催化剂载体材料的制备及改性技术研究是获得高性能劣质蜡油加氢处理催化剂的核心。本文针对常规Al₂O₃孔径分布较大而不利于反应物的扩散及比表面积的提高问题，介绍了均一介孔Al₂O₃（MA）载体的制备方法（溶胶-凝胶法、沉淀法、水热合成法）及优缺点。为提高催化剂加氢脱氮活性，综述了Al₂O₃载体的助剂（磷、硼、氟）改性、复合氧化物（钛铝、硅铝复合氧化物）改性及复合改性的最新研究进展，分析了改性后载体酸性及与活性相间相互作用的变化以及对催化剂加氢脱氮性能的影响。指出未来应着重于均一介孔Al₂O₃载体及复合改性两方面的研究，以期获得高活性劣质蜡油加氢脱氮催化剂。

关键词: 加氢, 催化剂, 劣质蜡油, 氧化铝, 制备方法, 活性, 改性