Kentucky refiner reconfigures resid FCC unit for normal FCC service

In 2004, Marathon Ashland Petroleum LLC revamped a 20-year-old, 40,000 b/sd resid FCC (RFCC) unit into a 95,000-b/sd FCC unit (Fig. 1) in its Cattlesburg, Ky., refinery. The revamped FCC unit now processes entirely hydrotreated feedstock to produce low-sulfur gasoline.The revamp has also resulted in less SOx and NOx emissions from the regenerator flue gas. This transformation represents a unique approach to using existing assets, which includes the revamp of an existing feed hydrotreater and decommissioning of a 1950s vintage FCC unit.The reconfigured RFCC unit restarted in February 2004 and has met all of Marathon Ashland’s expectations.The company’s goal was to produce gasol...

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