催化裂化催化剂磨损指数影响因素分析

Analysis for influencing factors of attrition index of catalytic cracking catalyst

分析了催化裂化催化剂制备过程中影响其磨损指数的主要因素,包括成胶制备过程中酸及铝溶胶的加入量、浆液固含量及原料粒度,以及喷雾成型过程中催化剂球形度及粒度分布等方面。结果表明,在成胶制备过程中,通过增大盐酸或铝溶胶加入量、增大成胶浆液固含量、铝溶胶改性及原料细化等方法可有效改善催化剂的抗磨性能;催化剂球形度越好,细粉含量越少,催化剂的抗磨性能亦越好。

The key factors that influenced the attrition index of catalytic cracking catalyst were analyzed during its preparation, including adding at mount of acid and alumina sol, the solid content in slurry and particle size of raw materials and the sphericity and particle size distribution of catalyst in the spray shaping process, etc. The results showed that through increasing the amount of acid or alumina sol, enhancing the solid content in slurry, modif.ying alumina sol and decreasing the partical size of raw materials, the attrition resistance of the catalyst was improved effectively, and the better the catalyst sphericity, the less the fine powder, and the better the attrition resistance of the catalyst.