Kinetics of catalytic cracking with short contact times

Hagelberg, P.; Eilos, I.; Hiltunen, J.; Lipiäinen, K.; Niemi, V.; Aittamaa, Juhani; Krause, A.O.I.

doi:10.1016/s0926-860x(01)00744-x

Cited by 44 publications

(41 citation statements)

References 13 publications

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“…Oliveira and Biscaia (1989) (emphasizing in the catalytic cracking of gasoline and paraffinic gas oils). Hagelberg et al (2002) expanded the 5-lump model of Ancheyta-Juarez et al (1999) to an 8-lump model by dividing the gasoline fraction into paraffins, olefins, naphthenes and aromatics. The more advanced model was proposed by Jacob et al (1976) which included 10 lumps (light and heavy gas oil paraffinic, naphthenic and aromatic rings and substituent).…”

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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“…The kinetics of catalytic cracking has been discussed before because of the importance of this process [1,2,[14][15][16]. The catalytic cracking reaction sequence applies two methods for expression.…”

Section: Modelingmentioning

confidence: 99%

Kinetic modeling based on complex reaction theory for n-butane catalytic cracking over HZSM-5

Barghi

Karimzadeh

2015

Reac Kinet Mech Cat

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The purpose of this study was to develop a kinetic model for normal butane catalytic cracking over H-ZSM-5. Experimental data were obtained from a previous study where catalytic cracking was carried out in a laboratory scale reactor at atmospheric pressure in the temperature range of 342-498°C. In this paper, a mathematical procedure is proposed for deriving reaction routes, overall reactions and the basic reaction routes based on the methodology of complex reactions theory, in order to describe the catalytic cracking kinetics of normal butane. A computer program developed in FORTRAN programming could execute the model automatically and MATLAB programming software to optimize the kinetic constants in order to obtain the product yields. The combined mechanism of normal butane catalytic cracking included complex reactions method and lumped model has been illustrated as a typical catalytic heterogeneous reaction. The kinetic parameters obtained from model are described by the Arrhenius equation. The model calculations were in appropriate accordance with the experimental data.

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“…Ancheyta-Juarez et al (1999) followed a different approach in their 5-lump models development, in which they considered the gas oil as one lump, but divided the gas lump into two lumps (liquefied product gas and dry gas). Hagelberg et al (2002) expanded the 5-lump model of Ancheyta-Juarez et al (1999) to an 8-lump model by dividing the gasoline fraction into paraffins, olefins, naphthenes and aromatics. 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).…”

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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Kinetics of catalytic cracking with short contact times

Cited by 44 publications

References 13 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

Kinetic modeling based on complex reaction theory for n-butane catalytic cracking over HZSM-5

Modeling of an Industrial Riser in the Fluid Catalytic Cracking Unit

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