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

Bollas, George M.; Lappas, A. A.; Iatridis, D. K.; Vasalos, I.A.

doi:10.1016/j.cattod.2007.02.037

Cited by 79 publications

(71 citation statements)

References 27 publications

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“…Therefore, the study of the reactions involved in the catalytic cracking process has followed the lumping methodology. The number of lumps of the proposed models for catalytic cracking reactions has been consecutively increasing to obtain a more detailed prediction of product distribution (Bollas et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Study of Seven-Lump Kinetic Model in the Fluid Catalytic Cracking Unit

Heydari¹

2010

American Journal of Applied Sciences

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Problem statement:The effective simulation of the Fluid Catalytic Cracking (FCC) operation requires a good understanding of many factors such as, reaction kinetic, fluid dynamics and feed and catalyst effects. Approach: In this model the reactor has been considered as an isothermal riser. The reactions in the riser occur with the fluid and the solids in ideal plug flow. Because of complication of the catalytic cracking mechanism and existence of multi-components in the feed, to decrease the calculation content in the kinetic models, the reactants and products have been considered as a set of hydrocarbons, so these models are called "Lumped Models". Results: To simulate the FCC riser, the seven-lump model involved residual oil, heavy lump, light lump, liquefied petroleum gas, gasoline, dry gas and coke (to predict the feed conversion and the product distribution) has been developed. Conclusion: Simulation studies are performed to investigate the effect of changing various process variables, such as temperature and residence time. Comparison of simulation results with industrial ones shows that the simulation has been achieved accurately.

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Section: Introductionmentioning

confidence: 99%

Study of Seven-Lump Kinetic Model in the Fluid Catalytic Cracking Unit

Heydari¹

2010

American Journal of Applied Sciences

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“…In this way similar components are grouped into a few "cuts" or "lumps. The number of lumps of the proposed models for catalytic cracking reactions has been consecutively increasing to obtain a more detailed prediction of product distribution (Bollas et al, 2007). In the first kinetic model (3-lump), proposed by Weekman (1968), reactants and products were lumped into three major groups: Gas oil, gasoline and light gas plus coke.…”

Section: Introductionmentioning

confidence: 99%

“…With presence of the high efficiency feed injection system in modern FCC units cause all cracking in the riser occur during the short time (about 1-5 sec). Therefore based on this fact, it is explainable that many of the models found in the literature (Arandes and de Lasa, 1992;Arbel et al, 1995;Han and Chung, 2001;Ali and Rohani, 1997;Bollas et al, 2007), describe the riser reactor, with one-dimensional mass, energy and chemical species balances, so in the present research, a one-dimensional, adiabatic model for the FCC unit riser has been developed that combines predicative riser hydrodynamic model with a four-lump kinetic model.…”

Section: Introductionmentioning

confidence: 99%

Modeling of an Industrial Riser in the Fluid Catalytic Cracking Unit

Heydari¹

2010

American Journal of Applied Sciences

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Problem statement: The aim of this study is to obtain a model that can simulate the performance of an industrial fluid catalytic cracking unit in steady state. Approach: The reactions in the riser occur in a transported bed with the fluid and the solids in ideal plug flow. One of the main advantages of the model is that it does not include any partial differential equations. This facilitates the solution of the equations and makes the model particularly suitable for control studies. Results: To simulate the FCC riser, the four-lump model involved gas oil, gasoline, light gas and coke (to predict the Gas oil conversion and the product distribution) has been developed. Conclusion: Simulation studies are performed to investigate the effect of changing various process variables, such as temperature, catalyst circulation rate and gasoil feed rate. The calculated data of the product distribution were agreed well with the experimental results.

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“…Carbon can be converted to CO or CO 2 .The combustion reaction serves to reactivate the catalyst and to maintain the bed hot enough to supply the heat required for the vaporization and cracking reaction of the feed in the reactor [10]. The typical catalyst residence time in the regenerator ranges from 5-15 min.…”

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confidence: 99%

Modeling and Simulation of Fluidized Catalytic Cracking Riser Reactor Using Pseudo Reaction Kinetics : A Review

P.K¹,

Rishabh²

2017

IJET

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The fluid catalytic cracking(FCC) is one of the key process unit in modern oil refining . FCC process converts heavy distillates like gas oil or residue to gasoline and middle distillates using cracking catalyst.FCC consist of two interconnected gas -solid fluidized bed reactor: riser and regenerator .FCC process is very complex and require good understanding of many factors such as kinetic models, reaction kinetic, fluid dynamics, feed and catalyst effects, temperature, residence time in the riser, catalyst deactivation and its regeneration. The performance of the reactor are measured in term of yield of gasoline and light gases, feed conversion, coke yield etc. A number of operating variables can be optimized for economical operation of FCC unit.

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

Cited by 79 publications

References 27 publications

Study of Seven-Lump Kinetic Model in the Fluid Catalytic Cracking Unit

Study of Seven-Lump Kinetic Model in the Fluid Catalytic Cracking Unit

Modeling of an Industrial Riser in the Fluid Catalytic Cracking Unit

Modeling and Simulation of Fluidized Catalytic Cracking Riser Reactor Using Pseudo Reaction Kinetics : A Review

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