Comparison between fixed fluidized bed (FFB) and batch fluidized bed reactors in the evaluation of FCC catalysts

摘要: Abstract The laboratory reactors ACE fixed fluidized bed FFB and batch CREC Riser Simulator were compared in the conversion of two commercial vacuum gas oil feedstocks (paraffinic aromatic types) over equilibrium FCC catalysts (octane-barrel resid under similar conditions. Reaction temperatures 510 540 °C catalyst to mass ratios from 4 9 unit, with time on stream varying 112 50 s, 6.35 Simulator, reaction times ranging 5 25 s. results contrasted some cases those a DCR circulating pilot plant unit at 540 °C. When different product yields considered, same ranking was observed both whole, differences between particularly being more perceptible reactor. reactor showed linear yield curve for gasoline, which facilitated analysis comparisons; this case, an overcracking regime not shown, like case LCO curves defined developed clearly Coke very high reactor, typical confined beds continuous feed reactants, while they range units. complementing potential evaluation process.