(244k) Kinetic Modelling of Secondary Cracking of Gasoline Adopting Non Selective Catalyst Deactivation Approach

The Secondary cracking of gasoline using Lumping scheme was mathematically modelled and simulated by adopting non selective catalyst deactivation approach. The model was used to study the impacts of coke on catalyst and time on stream catalyst deactivation functions on secondary cracking of gasoline. The effects of olefin cracking was given importance due to their impact on distribution of aromatics in product stream and coke on catalyst. The simulation results predicts that the olefins contributes for increase in aromatics content of gasoline by aromatization pathways. But increase in aromatics and olefins in the product stream rapidly deactivates the catalyst due to deposition of coke.  

Generally the effects of catalyst deactivation is categorised into Selective and Non Selective Deactivation approach. The Non Selective approach is further classified into Coke on catalyst and Time on stream. Among these Time on stream preferred over Coke on catalyst due the fact that some kinds of coke may not contribute to catalyst deactivation.

The results suggest that the prediction accuracy was greatly enhanced when the Time on stream model was used instead of Coke on stream.