孔道清理改性对水热超稳分子筛催化裂化性能的影响

考察了孔道清理改性对水热超稳分子筛催化裂化性能的影响,分别以经过孔道清理改性的分子筛及未经孔道清理改性的分子筛为活性组元制备催化剂,并对催化剂的物化性能及催化裂化性能进行了比较。结果表明,孔道清理改性能够使得所制备的催化剂孔体积及比表面积增大,水热稳定性及重油裂化能力明显增强,总液体收率及汽油收率显著增加,汽油选择性增大,焦炭选择性明显改善。

Effects of the Modification in Cleaning Pores of Ultra-Stable Zeolite Prepared by Hydrothermal Method on Its Catalytic Cracking Performance

The effects of the modification in cleaning pores of ultra-stable zeolite prepared by hydrothermal method on its catalytic cracking performance were studied.The ultra-stable zeolite Y modified or not modified by pore cleaning were used as active components for preparing catalysts,respectively.The physical properties and catalytic cracking performance of prepared catalysts were investigated in comparison.As compared with the catalyst using ultra-stable zeolite Y without modification cleaning as its active component.Catalyst using the modified ultra-stable zeolite Y as its active component had better physical properties and catalytic performance,its pore volume and specific surface area increased,hydrothermal stability and catalytic cracking ability improved.The total liquid yield and gasoline yield were inimproved,gasoline selectivity was increased and coke selectivity was improved.