Effect of feedstock properties on the performance of ZSM-5 additive in catalytic cracking reaction
Abstract
In this study, we present our recent laboratory experimental results regarding the application of ZSM-5 additive in catalytic cracking reactions. Our results show that the nature of feedstock significantly influences the performance of ZSM-5. For paraffinic feedstock, ZSM-5 additive not only increases propylene yield and gasoline octane but also improves the bottom cracking ability of Fluid Catalytic Cracking (FCC) catalysts. The conversion of paraffinic feedstock could increase up to 10wt% while that of aromatic feedstock remains almost unchanged upon the addition of ZSM-5 additive to the FCC catalyst. Mixing 5wt% of ZSM-5 additive with the FCC catalyst also results in increased propylene yields of 13wt% and 8wt% for paraffinic and aromatic feedstock, respectively. Our results can serve as guidance for refineries to flexibly control product yields by adjusting the processed feedstock or the amount of ZSM-5 additive used in the FCC unit.
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