Abstract：In order to meet the dual challenges of low sulfur and low aromatic quality requirements for diesel products, high-performance active phase construction and high-dispersed active phase stabilization technologies were innovatively developed to prepare diesel hydrogenation catalysts，which has high-activity and high-stability and their stability has been improved by more than 40% with the reference of catalyst in the production of National Ⅵ clean diesel. Meanwhile, utilizing the reaction patterns of hydrogenation saturation of monocyclic and polycyclic aromatic hydrocarbons，the ultra-deep dehydrogenation and de-aromatization dual-zone composite diesel hydrogenation process (RTS-Apro) was developed, which solves the problem of industrial plants being unable to achieve long-term operation with ultra-deep desulfurization and multi-aromatic ring saturation in conventional process, the capable of long-term production of automotive diesel with a polycyclic aromatic hydrocarbons (PAHs) mass fraction below 2.5% can be achieved. It successfully resolved the technical challenge of achieving both ultra-deep desulfurization and deep saturation of PAHs in industrial units. By introducing a small amount of hydrogen gas to disrupt the dissolution equilibrium of H2S, the dual-zone composite liquid phase diesel hydrogenation process (SLHT) was developed, which solves the difficulty of ultra-deep desulfurization in diesel hydrogenation process being inhibited by H2S, and can produce diesel with the sulfur mass fraction of below 3 μg/g which meeting the quality standard of National Ⅵ at low energy consumption mode for long-term operation. Diesel hydrogenation catalyst and technology have enabled refining enterprises in a low-cost, high-efficiency, and long-term stability methods to produce diesel meeting National Ⅵ standards. This provides reliable technological support for the rapid upgrade of diesel quality in China.
NIE Hong,ZHANG Rui,CHEN Wenbin et al. Development and Application in Upgrading Diesel Quality with Hydrogenation Catalysts and Process Technology[J]. Chemical Reaction Engineering and Technology, 2025, 41(5): 587-595.
