Catalytic Cracking of Diverse Vacuum Residue Hydrocracking Gas Oils

Ten gas oils and one deasphalted hydrocracked vacuum residue obtained from ebullated-bed vacuum residue hydrocracking have been cracked in a laboratory advanced catalyst evaluation unit on a commercial fluid catalytic cracking (FCC) catalyst. It was found that the eleven secondary heavy oils obey second-order reaction kinetics. The relations between gas oil properties and FCC conversion, product yields, and quality were evaluated by means of intercriteria analysis. It could be stated that the FCC conversion strongly correlates with the gas oil Kw characterization factor. The product yields were established to depend on the secondary gas oil carbon atoms number, aromatic ring index, paraffinic and aromatic carbon content, and the total aromatics content.

Automated summary

The study found that secondary heavy oils follow second-order reaction kinetics on a commercial FCC catalyst. The FCC conversion strongly correlates with the gas oil Kw characterization factor, while product yields depend on the secondary gas oil carbon atoms number, aromatic ring index, paraffinic and aromatic carbon content, and the total aromatics content.