Q & A > Question Details
Since FCC feed quality is varying from refinery to refinery due to their own refinery configuration, like some one is using hydrocracker bottom, hydrotreated VGO, RCO, reside, or fresh VGO. Therefore, cost of the FCC feed or VGO is different for all refineries and it may the based on the quality of VGO . What are the parameters which may decide the cost of VGO which may charged to FCC?
20/03/2010 A: Ralph Ragsdale, Ragsdale Refining Courses, ralph.ragsdale@att.net
And don't forget boiling range. Diesel boiling range material is not good feed. Goes through almost unchanged. A good LP model that accounts for the key feed qualities when calculating FCC yields and product qualities, allows for the kind of evaluation you are describing.
16/03/2010 A: Morgan Rodwell, Fluor Canada Limited, morgan.rodwell@fluor.com
Working forward through the refinery to come to a cost of FCC feed requires that you understand the cost of each crude being charged to the refinery and the cost of processing required. Crudes that are hydrogen deficient (low K), aromatic (high aniline point), or high in nitrogen or sulfur, will require more processing to make good FCC feed. One should also consider how different FCC feeds modify the yield of the FCC. A lower cost FCC may look attractive but if it shifts the yield from gasoline to LCO too much it may negate the benefit.