Abstract: With the increasingly stringent environmental regulations, reducing the olefin content of FCC gasoline has practical significance. Based on the mechanism of the hydride ion transfer reaction on the bimolecular reaction, a new concept of selective hydrogen transfer reaction is proposed to regulate and control gasoline olefins. It is found that the components rich in naphthenic aromatics and polycyclic alkanes can be used as hydride ion release agents to control gasoline olefins and inhibit the formation of coke. Through technological innovations such as the regulation of reaction modes, and the introduction of hydride ion release agents, the catalytic cracking technology for producing ultra-low olefin gasoline (ULO) has been successfully developed. The industrial application results show that ULO technology can be used to produce stable gasoline with a volume fraction of olefin less than 10%, maintaining gasoline octane number and coke selectivity, to realize the high-value conversion of LCO.

Key words: gasoline, olefin, selective hydrogen transfer, hydride ion release agent, ULO