New trimetallic catalyst improves FCCU feed quality

Although its previous hydroprocessing catalyst performed satisfactorily, a new trimetallic catalyst helped the Marathon Ashland LLC, Canton, Ohio, refinery achieve the same desulfurization with less severe operating parameters.Even with a higher feed sulfur content, higher feed rates, and lower hydrogen-to-hydrocarbon ratios, the new catalyst improved overall fluid catalytic cracking unit (FCCU) feed quality. Furthermore, it accomplished these improvements with a 23° F. lower weighted average bed temperature (WABT).The refinery demonstrated the performance of this new a cobalt-nickel-molybdenum (CoNiMo) based catalyst (TK-557), developed by Haldor Topsoe AS, in its fluid catalytic cra...

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