Abstract
The addition of heavy catalytic gasoil to cat cracker feed as a means of reducing the formation of coke was investigated. A vacuum gasoil was used as the feedstock, and a lube oil solvent extract and heavy catalytic gasoil were used as the activating additives. Data showed that feedstocks with the highest kinetic stability had the lowest coke formation in cracking. Kinetic stability was determined by the viscometric method. Test results show that heavy catalytic gasoil has a greater effect on reducing coke yield than the extract used.
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