A Kinematic Model for an Adiabatic Transfer Line Catalytic Cracking Reactor

Abstract

different classes of alcohols generated in this work, it is now possible to predict reverse osmosis separations of many alcohol solutes from data on membrane specifications given in terms of A and Dam/K6 for NaCl only. This predictability is illustrated in this paper for the Ci to Cg alcohols using cellulose acetate membranes of different surface porosities. This prediction technique can be extended to a wide variety of organic solutes in aqueous solutions where reverse osmosis separations are governed by polar, steric, and/or nonpolar effects and preferential sorption of water at the membrane-solution interface. This possibility opens new areas of reverse osmosis investigations involving a wide variety of organic solutes many of which are of practical interest from the point of view of water pollution control.Literature Cited

Five-lump kinetic model with selective catalyst deactivation for the prediction of the product selectivity in the fluid catalytic cracking process

“…Regarding the regression procedure, a dataset of experiments performed at constant temperature was used to estimate the catalyst decays n ij for each scenario and to obtain the starting values for the kinetic constants of each reaction scheme. The catalyst activity was considered independent of the riser temperature, as it was shown in this and other works [19,24] that temperature has an almost negligible effect on the coke deposition and thus on catalyst deactivation.…”

Analysis of zeolite catalyst deactivation during catalytic cracking reactions

“…proposed that exponential and hyperbolic decay functions are sometimes more appropriate to describe certain ranges of decay (e.g., Weekman, 1968Weekman, 1969Weekman and Nace, 1970;Nace et al, 1971;Paraskos et al, 1976;Shah et al, vantages is that a single function is usually not sufficient to describe the entire range of decay. This is apparent from Nace's data for cracking of n-hexadecane (Nace, 1969) and cracking of gas-oil (Nace, 1970) over zeolite catalysts, where the activity shows an initially rapid decrease followed by a relatively slower decay.…”

Pilot plant for the fluid catalytic cracking process: determination of the kinetic parameters of deactivation of the catalyst

“…Table I shows a summary of the information that we have found in the available literature concerning characteristics of the FCC pilot plants. Among these references only Paraskos et al (1976) and Shah et al (1977) show the evaluation of the kinetic parameters (with the pilot plant of the Gulf Co.), but they do not show any scheme of the pilot plant. The works by Pine et al (1984) and Cimbalo et al (1972) are also interesting, although they do not describe the ARC0 type circulating pilot plant they use.…”