关键词: 催化裂化, 汽油, 选择性加氢脱硫, 催化剂

Abstract: To meet China’s demand for production of clean gasoline, a series of catalysts is developed using selective hydrodesulfurization (DSO) process for FCC gasoline. The preparation process of this series is simple and free from noble metal and zeolite. A number of techniques are used, such as modification of pore structure and acid quality by fine-tuning alumina carrier, use of hydrothermal treatment and chemical additive, and preparation of stable Co-Mo solution. The pore structure, acidity and activity of catalyst are optimized and matched with one another. The catalyst is of high activity, high selectivity and high stability bringing about a in-depth desulfurization in FCC gasoline, effectively inhibiting olefin saturation and reducing octane number loss. The series of products has been successfully used in five sets of catalytic gasoline hydrogenation units, including the 700,000 tons/year facility of PetroChina Qingyang Petrochemical Company, the 1.5 million tons/year facility of PetroChina Daqing Oil Refining Company and the 900,000 tons/year facility of PetroChina Harbin Petrochemical Company. The results of industrial application indicate that this catalyst is characterized for its strong adaptability to feed stock, moderate reaction conditions, high desulfurization rate, low loss of octane number, high liquid yield, long operating period and reliable technological maturity.

Key words: catalytic cracking, gasoline, selective hydrodesulfurization, catalyst