催化裂化轻、重循环油选择性加氢转化的反应机理和催化剂设计基础

Effective transformation of catalytic cracking cycle oil with high content of aromatics, especially polycyclic aromatics is an important technology to meet the National VI clean fuels production and product structure adjustment of gasoline and diesel. Currently, the Hydrocracking and Hydrotreating combined Catalytic Cracking technologies has been used to proceed the catalytic cycle oil. However, the hydrogenation conversion and selectivity are not ideal. The Nano-structures of active phase are still uncontrollable, and their relationship with activity and selectivity of polycyclic aromatics hydrogenation are still unclear. In consideration of the characteristic of catalytic cracking cycle oil and the problems of current technologies, this project would focus on the controlled construction of nano-structure of active phase, and thus reveal the nature of the active phase, especially the relationship between the crystal plane of nano-structure and the hydrogenation activity - selectivity of polycyclic aromatics. Finally, the catalytic mechanism of molecular oil refining at the nano-level would be deeply understood. The project aims to develop a highly active and selective catalyst for hydrogenation of diesel and cycle oil, and to establish a theoretic foundation for promoting the hydrotreating combined catalytic cracking technique.

高芳烃催化裂化轻、重循环油的高效催化转化是生产满足国VI标准清洁油品和适应我国汽柴油产品结构调整的重要技术。本项目针对催化裂化轻循环油（柴油）和重循环油芳烃含量尤其是多环芳烃含量高的特点，以及现有催化裂化轻、重循环油加氢裂化和加氢处理-催化裂化组合工艺存在的转化率和选择性不够理想，加氢活性相纳米粒子控制建构方法不完善，及其与多环芳烃加氢活性-选择性构效关系不够深入的问题，开展加氢活性相纳米粒子控制构建方法研究，揭示加氢活性相纳米粒子结构，尤其是晶面取向与多环芳烃加氢活性-选择性的构效关系，以期在纳米层次上深化对分子炼油催化作用机理的认识，并为高活性、高选择性催化柴油和循环油加氢处理催化剂的研制和催化裂化轻、重循环油加氢处理-催化裂化组合工艺技术的提升和完善提供理论指导。

高芳烃催化裂化轻、重循环油的高效催化转化是生产满足国VI标准清洁油品和适应我国汽柴油产品结构调整的重要技术。本项目深入认识了FCC柴油及其窄馏分的组成、分子结构及其加氢反应规律；揭示了硫化方法调变氧化态活性组分硫化过程构建活性相微观结构的作用机制，阐明了活性相微观形貌与多环芳烃加氢活性和选择性的构效关系；形成了多环芳烃选择性加氢饱和催化剂的设计策略和制备技术；阐明了FCC柴油中特征反应物沿反应器轴向加氢转化的规律，形成了FCC柴油深度选择性加氢转化的催化剂复配技术，为高活性、高选择性FCC柴油加氢处理催化剂的研制和组合工艺技术的开发提供理论指导和技术支撑。