Effect of Operation Conditions on the Compositionof Gasoline during the Process of Decreasing FluidCatalytic Cracking Gasoline Olefin

Effects of operation conditions were studied on the compositions and research octane number (RON) of fluid catalytic cracking (FCC) gasoline with GOR-Q catalyst for reducing olefin and with normal MLC-500 catalyst. The results show that most of gasoline olefins are in low carbon number and the effect of GOR-Q catalyst on decreasing gasoline olefin is obvious. The influence of the operation conditions on olefin, aromatic and iso-paraffin content of FCC gasoline is apparent. The operation conditions less than (520 °C) in reaction temperature and no less than 7 in catalyst to oil ratio for GOR-Q catalyst are beneficial to the reduction of gasoline olefin content. The RON of FCC gasoline will decrease by (1.1) to (1.7) units under the reaction temperature from 500 to (520 °C) and the catalyst to oil ratio from 5 to 8.