Catalysts at a constant additive level, shows higher light olefins yields compared to a leading additivec (FIG. 9). Takeaways. OQ conducted a comprehensive and rigorous process to choose a new, higher performing catalytic system that would enable it to boost high-value propylene while reducing bottoms yields in its RFCCU. The move from a previous-generation catalysta combined with a high-activity additivec resulted in higher light olefins at much improved bottoms cracking, adding $15.2 MM/yr in profitability. Although this RFCCU is processing one of the most chalto a new catalystb lenging residual streams in the industry, the authors' company's technologies helped position the Sohar Refinery as one of the biggest FCC propylene makers worldwide. The strong residto-propylene performance and the unique strategic location of OQ in Oman ensures a tremendous strong profitability position towards the new energy transition era for the FCCU. FIG. 7. Catalystd propylene vs. hydrogen yields. FIG. 8. OQ Sohar refinery RFCCU yields vs. industry. Hydrocarbon Processing | OCTOBER 2022 55