Regeneration of PtTiZrOx/SiO2 and PtCeNaX/SiO2 by Hydrogen treatment.Part II Catalyst regeneration in a continuous fluidized bed reactor

摘要

Solid alkylation spent catalysts (PtSOxTiZr/SiO2 and PtCeNaX/SiO2) were regenerated in a semibatch reactor.Four spent catalysts,with different amount of coke and solid structure were obtained in butane alkylation pilot plant in presence of hydrogen,were hydrocracked at different temperature,gas flow rate and residence time to determine the kinetic rate expression.Conversion of coke and three families of hydrocarbons were measured as a function of temperature contact time and gas linear velocity.Kinetic rate constants were obtained by reactor numerical simulation that employ a genetic algorithm to adjust the constants.The kinetic of coke conversion follow a two in-series first order reactions respect to global coke content and an order 0.3 respect to hydrogen.Paraffinic coke is converted around 1.3 times faster than naphthenic ones.