Residual feeds processing in FCC units require the catalyst system adaptation to overcome possible diffusion limitations and secure the refiner profitability. Even at high make-up rates, bottoms conversion, catalyst activity and its coke and gas selectivity are impaired because of inevitable mass transfers. As a result, the FCCU profitability is impaired.
The FCC UPGRADER premium catalysts family for residues was specifically designed for feeds that are heavy and mass transfer-limited. Its unpaired accessibility enables a significantly higher diffusion of high-molecular weight molecules towards the interior of the catalyst particle. The improved matrix performance and higher zeolite contribution for cracking favor superior residue processing.
The UPGRADER R+ catalyst benefits from the same UPGRADER technology, but is optimized for units requiring still more coke selectivity through adjustments in its metals resistance.