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A coupled CFD simulation approach for investigating the pyrolysis process in industrial naphtha thermal cracking furnaces

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Chinese Journal of Chemical Engineering 2022年第4期35卷 528-542页

作者： mohsen rezaeimanesh Ali Asghar Ghoreyshi S.M.Peyghambarzadeh Seyed Hassan Hashemabadi Chemical Engineering Department Babol Noshirvani University of TechnologyShariati Ave.47148-71167 BabolIran Department of Chemical Engineering Mahshahr BranchIslamic Azad UniversityMahshahrIran Computational Fluid Dynamics(CFD)Research Laboratory School of ChemicalPetroleum and Gas EngineeringIran University of Science and Technology(IUST)TehranIran

In the steam thermal cracking of naphtha,the hydrocarbon stream flows inside tubular reactors and is exposed to flames of a series of burners in the *** this paper,a full three-dimensional computational fluid dynamics(CFD)model was developed to investigate the process variables in the firebox and reactor coil of an industrial naphtha *** comprehensive CFD model consists of a standard k-εturbulence model accompanied by a molecular kinetic reaction for cracking,detailed combustion model,and radiative *** order to improve the steam cracking performance,the model is solved using a proposed iterative *** respect to temperature,product yield and specially propylene-toethylene ratio(P/E),the simulation results agreed well with industrial data obtained from a mega olefin plant of a petrochemical *** deviation of P/E results from industrial data was less than 2%.The obtained velocity,temperature,and concentration profiles were used to investigate the residence time,coking rate,coke concentration,and some other *** coke concentration at coil exit was1.9×10^(-3)%(mass)and the residence time is calculated to be 0.29 *** results can be used as a scientific guide for process engineers.

关键词： Naphtha thermal cracking CFD modeling Systems engineering Residence time Product yield

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