With a Stone & Webster design, the Residue Oil Fluid Catalystic Cracking Unit at CPC Talin Refinery is one of the largest RFCC in the world. With up to 100% unhydrotreated atmospheric tower bottom (ATB) as feed, the unit operates at 80,000 barrels per day with a catalyst inventory of 1,000 tons. It also features high olefins make. The unit operates at high metal levels with combined V, Ni, and Fe content at greater than 15 ppm for feed and greater than 10,000 wppm for E-cat. The first lot is scheduled to ship by April 1, 2022.