Effect of Operation Conditions on the Composition and Octane Number of Gasoline in the Process of Reducing the Content of Olefins in Fluid Catalytic Cracking (FCC) Gasoline

Effects of operation conditions were studied on the compositions and research octane number (RON) of gasoline from fluid catalytic cracking (FCC) with the GOR-Q catalyst and a normal MLC-500 catalyst for reducing olefin content. The results show that the effect of the GOR-Q catalyst on decreasing the olefins content in FCC gasoline is obvious and most of olefins in gasoline have low carbon numbers. The influence of the operation conditions on olefin, aromatics, and isoparaffin content of FCC gasoline is apparent. The operation conditions at a reaction temperature of <520 °C and a catalyst/oil (cat/oil) ratio of no less than 7 for the GOR-Q catalyst are beneficial to reduce the olefin content of gasoline. The RON value of FCC gasoline will decreased by 1.1−1.7 units, under a reaction temperature of 500−520 °C and the cat/oil ratio changes from 5 to 8.