Marathon Petroleum Co.s (MPCs) Catlettsburg
fluid catalytic cracking unit (FCCU) experienced a catalyst
circulation constraint due to partial blockage of an
intra-regenerator standpipe. The unit was initially
debottlenecked by introducing torch oil, along with increased
catalyst addition, to maintain unit activity. The refinery then
introduced a high-activity co-catalyst into the FCCU.
1 The co-catalyst solution allowed removing the
torch oil while maintaining catalyst activity, thus optimizing
the FCCUs profitability within the catalyst circulation
limit. The cost of the co-catalyst is minor, while the direct
measured value creation at the Catlettsburg refinery was over $1/bbl.