催化裂化是重质油轻质化的重要手段之一，但重油高效转化催化裂化催化剂的性能仍有待提高。调控催化剂基质组分表面Lewis酸性质是提高重油转化率和优化产物分布的有效途径。但是，基质表面Lewis酸性调控的方法仍比较欠缺。本课题拟以介孔氧化硅材料KIT-6为基质，采用原子层沉积法实现KIT-6表面金属杂原子的均匀掺杂，达到精确调控其表面Lewis酸性质的目的，研究金属杂原子种类、掺杂量与基质表面Lewis酸密度和酸强度之间的规律，探索基质表面Lewis酸性调控的新方法；研究基质表面Lewis酸性质在纯烃催化裂化反应中的作用机制，通过改变催化剂床层类型研究基质Lewis酸性质对重油催化裂化反应的影响规律，揭示基质表面Lewis酸在烃类催化裂化反应中的机理。该项目的顺利实施将会为重油高效转化催化裂化催化剂基质材料的研究和开发提供新的策略和理论依据。

Fluid catalytic cracking (FCC) process is one of the most significant methods for heavy oil lightening, however, the performance of FCC catalysts for high efficiency conversion of heavy oil still needs to be improved. Adjusting the Lewis acid properties on the surface of catalyst matrix is an effective way to improve conversion of heavy oil and optimize product distributions. However, the adjusting methods of surface Lewis acidity of matrix are still deficient. In this work, the uniform doping of metal heteroatoms on KIT-6 matrix, which is a mesoporous silica material, will be realized by atomic layer deposition method, so as to precisely control the Lewis acid properties on the surface of KIT-6 matrix material. The relations among metal heteroatoms species, doping amounts and Lewis acid density and acid strength of matrix will be studied. A new method for controlling the Lewis acidity of matrix materials will be established. The catalytic cracking mechanism of pure hydrocarbons on Lewis acid sites will be studied. The influence of Lewis acidity of matrix on the catalytic cracking of heavy oil will be investigated by varying catalyst bed configurations. The catalytic cracking mechanism of hydrocarbons on the Lewis acid sites of matrix will be finally revealed. The smooth implementation of this project will provide a new strategy and theoretical basis to research and development of FCC catalyst matrix with high performance in heavy oil catalytic conversion.