September 2018

Special Focus: Refining Technology

Reduce dry gas and coke with a more flexible FCC technology

To meet increasingly stringent specifications for cleaner gasoline and to produce more clean fluid catalytic cracking (FCC) naphtha with lower olefins, a novel FCC technologya for maximizing isoparaffins was developed in the late 1990s. The technology’s principal is based on the formation and conversion of olefins in two different reaction zones.

Gong, J., Xu, Y., Zhang, J., Chang, X., Wei, X., Tang, J., SINOPEC Research Institute of Petroleum Processing (RIPP)

To meet increasingly stringent specifications for cleaner gasoline and to produce more clean fluid catalytic cracking (FCC) naphtha with lower olefins, a novel FCC technologya for maximizing isoparaffins was developed in the late 1990s.1 The technology’s principal is based on the formation and conversion of olefins in two different reaction zones. Olefins are produced in Zone 1, and then are consumed in Zone 2 by subsequent reactions, such as isomerization and hydrogen (H2) transfer, thereby converting some olefins to isoparaffins or aromatics. To date, more than 50 FCC units have been running smoothly, using the proprietary technology in China, with a total capacity of 81 MMtpy. To make fu

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