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What will be the impact of crude blend on FCC product yield? if we are processing 95% hydrotreated VGO and 5% of non-hydrotreated VGO (i.e. Sour VGO). although the feed to the FCC is mainly hydrotreated, will crude blend affect the product yield?
 
Answers
07/01/2015 A: Sridhar Balakrishnan, Bharat Oman Refineries Limited , laksrid@yahoo.com
Whatever type of crude blend is processed in a refinery , feedstock to FCC should be hydrotreated to get maximum yield of lighters like LPG and Gasoline. If we are processing crude oil with high density , then the VGO needs to be hydrotreated . Low density crude oil is processed, hydrotreating may not be required for VGO to facilitate as feedstock for FCC unit .
05/01/2015 A: Ralph Ragsdale, Ragsdale Refining Courses, ralph.ragsdale@att.net
Assuming both feed streams are from the same crude: The unhydrotreated portion will yield less LPG and naphtha and more LCO and decant oil.