Journal ArticleDOI
Kinetics of catalytic cracking selectivity in fixed, moving, and fluid bed reactors
Vern W. Weekman,Donald M. Nace +1 more
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In this paper, a kinetic mathematical model of catalytic cracking is described which accounts for conversion and gasoline yield in isothermal fixed, moving, and fluid bed reactors, and the model has been tested and verified by using laboratory moving bed data with a commercial gas oil and catalyst.Abstract:
A kinetic mathematical model of catalytic cracking is described which accounts for conversion and gasoline yield in isothermal fixed, moving, and fluid bed reactors The model has been tested and verified by using laboratory moving bed data with a commercial gas oil and catalyst It is shown that under certain conditions, the selectivity behavior and maximum gasoline yield of fixed, fluid, and moving bed reactors will be identical Maximum gasoline yield is defined in terms of both the kinetic parameters and the process variables for fixed, moving, and fluid bed reactorsread more
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Journal ArticleDOI
Statistical and continuum models of fluid-solid reactions in porous media
TL;DR: In this article, the authors discuss past theoretical works on fluid-solid reactions in a porous medium and discuss the fundamental role of connectivity of the porous medium in such phenomena, and compare two different modelling approaches to reactions accompanied by structural changes.
Journal ArticleDOI
Review on active thermal protection and its heat transfer for airbreathing hypersonic vehicles
TL;DR: In this paper, the authors present a comprehensive literature review on three active cooling methods, i.e., regenerative cooling, film cooling, and transpiration cooling, including the fluids flow, heat transfer, and thermal cracking characteristics of different hydrocarbon fuels.
Journal ArticleDOI
Advanced Modeling of Fluid Catalytic Cracking Riser-Type Reactors
K.N. Theologos,N.C. Markatos +1 more
TL;DR: In this article, a mathematical model is developed that predicts three-dimensional, two-phase flow, heat transfer and reaction inside catalytic cracking riser-type reactors, which can predict the most important engineering aspects of a riser reactor including pressure drop, catalyst holdup, interphase slip velocity, catalyst acceleration zone, choking behavior and temperature distribution in both phases, and yields distribution all over the reactor.
Journal ArticleDOI
A fundamental kinetic model for hydrocracking of C8 to C12 alkanes on Pt/US-Y zeolites
TL;DR: In this paper, the authors quantitatively described a model based on independently determined physisorption parameters, quasi-equilibrated hydrogenation-dehydrogenation and protonation-deprotonation reactions, and a network of elementary reactions of alkylcarbenium ions as rate-determining steps.
Journal ArticleDOI
Dynamic modeling and simulation of a fluidized catalytic cracking process. Part I : Process modeling
In-Su Han,Chang-Bock Chung +1 more
TL;DR: In this article, a detailed dynamic model of a typical FCC unit that consists of the reactor, regenerator, and catalyst transfer lines is developed, where a distributed parameter model is presented for the reactor riser to predict the distributions of the catalyst and gas-phase velocities, the molar concentrations of 4 lump species, and the temperatures.