关键词: 柴油, 加氢催化剂, RTS工艺, 超深度脱硫, 多环芳烃深度饱和

Abstract: Faced with challenges from the national dual quality requirements for low-sulfur and low-aromatics diesel, based on the in-depth understanding of the deactivation mechanism of diesel hydroprocessing catalysts together with the reaction chemistry of hydrodesulfurization and hydrodearomatization, the new catalyst preparation technology was developed by inventing the assembly technology of high-performance active phase and the stabilization technology of well-dispersion active phase. Two highly-active and well-stable hydrogenation catalysts were developed with above preparation technology, along with the RTS (Remove Trace Sulfur) process invention, which aims at directionally strengthening the targeted reactions, and the problem for industrial units to achieve ultra-deep hydrodesulfurization, deep hydrodeacromatization and long operation cycle simultaneously was solved. Innovations in both catalyst and process brought the formation of key technologies for efficient clean diesel production, which can realize the long term stable production of China V / China VI standard diesel with low-cost, high-efficiency. Until now, these technologies have been successfully applied in 36 sets of commercial units with a total processing capacity of more than 50 Mt/a, providing technical supports for the rapid upgrading of China's fuel oil quality.

Key words: diesel, hydroprocessing catalyst, RTS process, ultra-deep hydrodesulfurization, deep hydrodearomatization