Catalytic Cracking of Diverse Vacuum Residue Hydrocracking Gas Oils

Abstract

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.

Crude Slate, FCC Slurry Oil, Recycle, and Operating Conditions Effects on H-Oil® Product Quality

“…The relations between 135 characterizing parameters for the 36 studied cases were investigated by the use of intercriteria analysis (ICrA). More information about the application of ICrA the reader can find in our recent studies [1,3]. ICrA defines the values of positive and negative consonance (µ) of the studied criteria (parameters) [1,3].…”

“…More information about the application of ICrA the reader can find in our recent studies [1,3]. ICrA defines the values of positive and negative consonance (µ) of the studied criteria (parameters) [1,3]. The meaning of µ = 0.75 ÷ 1.00 denotes a statistically meaningful positive relation, where the strong positive consonance exhibits values of µ = 0.95 ÷ 1.00, and the weak positive consonance exhibits values of µ = 0.75 ÷ 0.85.…”

“…The meaning of µ = 0.75 ÷ 1.00 denotes a statistically meaningful positive relation, where the strong positive consonance exhibits values of µ = 0.95 ÷ 1.00, and the weak positive consonance exhibits values of µ = 0.75 ÷ 0.85. Respectively, the values of negative consonance with µ = 0.00 ÷ 0.25 means a statistically meaningful negative relation, where the strong negative consonance exhibits values of µ = 0.00 ÷ 0.05, and the weak negative consonance exhibits values of µ = 0.15 ÷ 0.25 [1,3].…”

“…The average number of aromatic rings predicted by the aromatic ring index (ARI) strongly correlates with density of HAGO, LVGO, and HVGO (µ = 0.98-0.99). The ARI of H-Oil ® gas oils was found to affect conversion and coke yield during catalytic cracking of H-Oil ® heavy oils [3]. Table 2 presents the range of variation of the properties of the mixed feed and of the products: naphtha, diesel, heavy atmospheric gas oil (HAGO), light vacuum gas oil (LVGO), heavy vacuum gas oil (HVGO), ATB, and VTB for the studied 36 cases.…”

“…The vacuum gas oil (VGO) is catalytically cracked. It was found that the properties of the H-Oil ® VGO varied in a wide range, depending on H-Oil ® feed structure and operation severity which affected the H-Oil ® VGO reactivity during its processing in the fluid catalytic cracking (FCC) [3,4]. The H-Oil ® feed structure consisted of straight run vacuum residue, FCC slurry oil (SLO) and recycle of partially blended fuel oil (PBFO).…”