Dynamic modeling and simulation of a fluidized catalytic cracking process. Part I: Process modeling

Han, In-Su; Chung, Chang-Bock

doi:10.1016/s0009-2509(00)00493-0

Cited by 116 publications

(181 citation statements)

References 35 publications

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“…On the basis of the 10-lump model of Jacob et al (1976); Ellis et al (1998) developed a more advanced model capable of predicting the light gas product slate, using empirical algebraic equations. 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 (Arandes and de Lasa, 1992;Arbel et al, 1995;Han and Chung, 2001;, so in the present research, a one-dimensional isothermal for the FCC unit riser has been developed that combines a predicative riser hydrodynamic model with a seven-lump kinetic model. The model has been validated by comparison with industrial FCC unit riser conversion and yield data available from literature (Mu et al, 2003).…”

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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“…We note in Fig. 2 that initial concentrations of oxygen, carbon monoxide, and carbon dioxide were chosen (Han & Chang, 2001) in order to simulate the models. Thus, the initial rapid increase in the concentrations of theses gases may indicate that the chosen initial concentrations of the gases are less than their 'actual' concentrations at the beginning of coke combustion.…”

Section: Hydrodynamic Specificationsmentioning

confidence: 99%

“…Combustion of coke is exothermic and it produces large amount of heat that is partially absorbed by the regenerated catalyst and also provides the heat required for vaporization of the feedstock and the endothermic cracking reactions that take place in the riser-reactor. For this reason, FCC units are often referred to as heat balanced (Ahari et al, 2008;Han & Chang, 2001;Ali et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

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Modelling catalyst regeneration in an industrial FCC unit

Dagde¹,

Puyate²

2013

AJSMS

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Predictive models for process parameters during regeneration of spent catalyst in an industrial fluid catalytic cracking (FCC) unit are presented. The models adopt a twophase theory where the dense region of the regenerator is divided into a bubble-phase and an emulsion-phase. The bubble-phase is modelled as a plug flow reactor, while the emulsion-phase is modelled as a continuous stirred tank reactor (CSTR). Profiles for regenerator-temperature, quantity of coke burnt, and flue gas composition, at different operating conditions are also presented. Model-predictions are compared with plant data and good agreement is obtained. Simulation results indicate that inlet-air velocity and catalyst-bed height have significant influence on the performance of the rege nerator. The model-estimated optimum operating conditions of the regenerator are regeneratortemperature of about 1000 K, inlet-air velocity of about 13.5 m/s, and catalyst-bed height of 13 m.

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“…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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Dynamic modeling and simulation of a fluidized catalytic cracking process. Part I: Process modeling

Cited by 116 publications

References 35 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

Modelling catalyst regeneration in an industrial FCC unit

Modeling of an Industrial Riser in the Fluid Catalytic Cracking Unit

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