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Research Papers

Numerical Simulation of an Industrial Fluid Catalytic Cracking Regenerator

[+] Author and Article Information
Guangwu Tang, Armin K. Silaen, Bin Wu, Chenn Q. Zhou

Center for Innovation Through Visualization
and Simulation (CIVS),
Purdue University Calumet,
Hammond, IN 46323

Dwight Agnello-Dean, Joseph Wilson, Qingjun Meng, Samir Khanna

BP Refining and Logistics Technology,
Naperville, IL 60563

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received March 9, 2014; final manuscript received November 3, 2014; published online February 18, 2015. Assoc. Editor: Ranganathan Kumar.

J. Thermal Sci. Eng. Appl 7(2), 021012 (Jun 01, 2015) (10 pages) Paper No: TSEA-14-1047; doi: 10.1115/1.4029209 History: Received March 09, 2014; Revised November 03, 2014; Online February 18, 2015

Fluid catalytic cracking (FCC) is one of the most important conversion processes in petroleum refineries, and the FCC regenerator is a key part of an FCC unit utilized in the recovery of solid catalyst reactivity by burning off the deposited coke on the catalyst surface. A three-dimensional multiphase, multispecies reacting flow computational fluid dynamics (CFD) model was established to simulate the flow and reactions inside an FCC regenerator. The Euler–Euler approach, where the two phases (gas and solid) are considered to be continuous and fully interpenetrating, is employed. The model includes gas–solid momentum exchange, gas–solid heat exchange, gas–solid mass exchange, and chemical reactions. Chemical reactions incorporated into the model simulate the combustion of coke which is present on the catalyst surface. The simulation results were validated by plant data.

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References

Mathiesen, V., Solberg, T., and Hjertager, B. H., 2000, “An Experimental and Computational Study of Multiphase Flow Behavior in a Circulating Fluidized Bed,” Int. J. Multiphase Flow, 26(3), pp. 387–419. [CrossRef]
Hernandez-Jimenez, F., Third, J. R., Scosta-Iborra, A., and Muller, C. R., 2011, “Comparison of Bubble Eruption Models With Two-Fluid Simulations in a 2D Gas–Fluidized Bed,” Chem. Eng. J., 117(1), pp. 328–339. [CrossRef]
Gao, J., Lan, X., Fan, Y., Chang, J., Wang, G., Lu, C., and Xu, C., 2009, “CFD Modeling and Validation of the Turbulent Fluidized Bed of FCC Particles,” Particle Technol. Fluidization, 55(7), pp. 1680–1694. [CrossRef]
Huilin, L., and Gidaspow, D., 2003, “Hydrodynamics of Binary Fluidization in a Riser: CFD Simulation Using Granular Temperatures,” Chem. Eng. Sci., 58(16), pp. 3777–3792. [CrossRef]
Wang, S., Lu, H., Li, X., Yu, L., Ding, J., and Zhao, Y., 2008, “CFD Simulations of Bubbling Beds of Rough Spheres,” Chem. Eng. Sci., 58(23), pp. 5653–5662. [CrossRef]
Chiesa, M., Mathiesen, V., Melheim, J. A., and Halvorsen, B., 2005, “Numerical Simulation of Particulate Flow by the Eulerian–Lagrangian and the Eulerian–Eulerian Approach With Opplication to a Fluidized Bed,” Comput. Chem. Eng., 29(2), pp. 291–304. [CrossRef]
Chen, Y.-M., 2006, “Recent Advances in FCC Technology,” Powder Technol., 163(1–2), pp. 2–8. [CrossRef]
Geldart, D., 1973, “Types of Gas Fluidization,” Powder Technol., 7(5), pp. 285–292. [CrossRef]
Goldschmidt, M. J. V., Kuipers, J. A. M., and van Swaaij, W. P. M., 2001, “Hydrodynamic Modeling of Dense Gas–Fluidized Beds Using the Kinetic Theory of Granular Flow: Effect of Coefficient of Restitution on Bed Dynamics,” Chem. Eng. Sci., 56(2), pp. 571–578. [CrossRef]
Goldschmidt, M. J. V., Kuipers, J. A. M., and Beetstra, R., 2004, “Hydrodynamic Modeling of Dense Gas–Fluidized Beds: Comparison and Validation of 3D Discrete Particle and Continuum Models,” Powder Technol., 142(1), pp. 23–47. [CrossRef]
Hoomans, B. P., Kuipers, J. A. M., Briels, W. J., and van Swaaij, W. P. M., 1996, “Discrete Particle Simulation of Bubble and Slug Formation in a Two-Dimensional Gas–Fluidized Bed,” Chem. Eng. Sci., 51(1), pp. 99–108. [CrossRef]
Xu, B. H., and Yu, A. B., 1997, “Numerical Simulation of the Gas–Solid Flow in a Fluidized Bed by Combining Discrete Particle Method With Computational Fluid Dynamics,” Chem. Eng. Sci., 52(16), pp. 2785–2908. [CrossRef]
Tsuji, Y., Kawaguchi, T., and Tanaka, T., 1933, “Discrete Particle Simulation of Two-Dimensional Fluidized Bed,” Powder Technol., 77(1), pp. 79–87. [CrossRef]
Tsuji, Y., Tanaka, T., and Ishida, T., 1992, “Lagrangian Numerical Simulation of Plug Flow of Cohesionless Particles in a Horizontal Pipe,” Powder Technol., 71(3), pp. 239–250. [CrossRef]
Hoomans, B. P. B., Kuipers, J. A. M., Briels, W. J., and Van Swaaij, W. P. M., 1996, “Discrete Particle Simulation of Bubble and Slug Formation in a Two-Dimensional Gas–Fluidised Bed: A Hard-Sphere Approach,” Chem. Eng. Sci., 51(1), pp. 99–118. [CrossRef]
Xu, B. H., and Yu, A. B., 1997, “Numerical Simulation of the Gas–Solid Flow in a Fluidized Bed by Combining Discrete Particle Method With Computational Fluid Dynamics,” Chem. Eng. Sci., 52(16), pp. 2785–2809. [CrossRef]
Gao, J., Lan, X., Fan, Y., Chang, J., Wang, G., Lu, C., and Xu, C., 2009, “Hydrodynamics of Gas–Solid Fluidized Bed of Disparately Sized Binary Particles,” Chem. Eng. Sci., 64(20), pp. 4302–4316. [CrossRef]
Hosseini, S. H., Rahimi, R., Zivdar, M., and Samimi, A., 2009, “CFD Simulation of Gas–Solid Bubbling Fluidized Bed Containing FCC Particles,” Korean J. Chem. Eng., 26(5), pp. 1405–1413. [CrossRef]
Hosseini, S. H., Ahmadi, G., Rahimi, R., Zivdar, M., and Esfahany, M. N., 2010, “CFD Studies of Solids Hold-Up Distribution and Circulation Patterns in Gas–Solid Fluidized Beds,” Powder Technol., 200(3), pp. 202–215. [CrossRef]
Benyahia, S., Arastoopour, H., Knowlton, T. M., and Massah, H., 2000, “Simulation of Particles and Gas Flow Behavior in the Riser Section of a Circulating Fluidized Bed Using the Kinetic Theory Approach for the Particulate Phase,” Powder Technol., 112(1–2), pp. 24–33. [CrossRef]
Li, P., Lan, X., Xu, C., Wang, G., Lu, C., and Gao, J., 2009, “Drag Models for Simulating Gas–Solid Flow in the Turbulent Fluidization,” Particuology, 7(4), pp. 269–277. [CrossRef]
Bai, D., Zhu, J.-X., Jin, Y., and Yu, Z., 1988, “Simulation of FCC Catalyst Regeneration in a Riser Regenerator,” Chem. Eng. J., 71(2), pp. 97–109. [CrossRef]
Dimitriadis, V. D., Lappas, A. A., and Vasalos, L. A., 1998, “Kinetics of Combustion of Carbon in Carbonaceous Deposits on Zeolite Catalysts for Fluid Catalytic Cracking Units (FCCU). Comparison Between Pt and Non Pt-Containing Catalysts,” Fuel, 77(12), pp. 1377–1383. [CrossRef]
Faltsi-Saravelou, O., Vasalos, A., and Dimogiorgas, G., 1991, “FbSim: A Model for Fluidized Bed Simulation II. Simulation of an Industrial Fluidized Catalytic Cracking Regenerator,” Comput. Chem. Eng., 15(9), pp. 647–656. [CrossRef]
Sotirchos, A. V., Mon, E., and Amundson, N. R., 1983, “Combustion of Coke Deposits in a Catalyst Pellet,” Chem. Eng. Sci., 38(1), pp. 55–68. [CrossRef]
Lee, L.-S., Yu, S.-W., and Cheng, C.-T., 1989, “Fluidized-Bed Catalyst Cracking Regenerator Modeling and Analysis,” Chem. Eng. J., 40(2), pp. 71–82. [CrossRef]
Cao, B., Zhang, P., Zheng, X., Xu, C., and Gao, J., 2008, “Numerical Simulation of Hydrodynamics and Coke Combustions in FCC Regenerator,” Pet. Sci. Technol., 26(3), pp. 256–269. [CrossRef]
Sapre, A. V., Leib, T. M., and Anderson, D. H., 1990, “FCC Regenerator Flow Model,” Chem. Eng. Sci., 45(8), pp. 2203–2209. [CrossRef]
Almuttahar, A., and Taghipour, F., 2008, “Computational Fluid Dynamics of High Density Circulating Fluidized Bed Riser: Study of Modeling Parameters,” Powder Technol., 185(1), pp. 11–23. [CrossRef]
Gunn, D. J., 1978, “Transfer of Heat or Mass to Particles in Fixed and Fluidized Bed,” Int. J. Heat Mass Transfer, 21(4), pp. 467–476. [CrossRef]
Tsuo, Y. P., and Gidaspow, D., 2004, “Computation of Flow Patterns in Circulating Fluidized Beds,” AIChE J., 36(6), pp. 885–896. [CrossRef]
Syamlal, M., and O'Brien, T. J., 1989, “Computer Simulation of Bubbles in a Fluidized Bed,” AIChE Symp. Ser., 85(1), pp. 22–31.
fluent 13.0, User's Guide, FLUENT, Inc.
Versteeg, H. K., and Malalasekera, W., 1995, An Introduction to Computational Fluid Dynamics, the Finite Volume Method, John Wiley & Sons, New York.
Wen, C. Y., and Yu, Y. H., 1966, “Mechanics of Fluidization,” Chem. Eng. Prog. Symp. Ser., 62, pp. 100–111.
McKeen, T., and Pugsley, T., 2003, “Simulation and Experiment Validation of a Freely Bubbling Bed of FCC Catalyst,” Powder Technol., 129(1–3), pp. 139–152. [CrossRef]
Lettieri, P., Newtone, D., and Yates, J. G., 2002, “Homogeneous Bed Expansion of FCC Catalysts, Influence of Temperature on the Parameters of the Richardson–Zaki Equation,” Powder Technol., 123(2-3), pp. 221–231. [CrossRef]
Ergun, S., 1952, “Fluid Flow Through Packed Columns,” Chem. Eng. Prog., 48(6), pp. 89–94.
Schiller, L., and Naumann, A., 1933, “A Drag Coefficient Correlation,” VDI Zeits, 77, pp. 318–320.
de Souza Braun, M. P., Mineto, A. T., Navarro, H. A., Cabezas-Gomez, L., and da Silva, R. C., 2010, “The Effect of Numerical Diffusion and the Influence of Computational Grid Over Gas–Solid Two-Phase Flow in a Bubbling Fluidized Bed,” Math. Comput. Modell., 52(9–10), pp. 1390–1942. [CrossRef]
Kanervo, J. M., Krause, A. O., Aittama, J. R., Hagelberg, P. H., Lipiainen, K. J. T., Eilos, I. H., Hiltunen, J. S., and Niemei, V. M., 2001, “Kinetics of Regeneration of a Cracking Catalyst Derived From TPO Measurements,” Chem. Eng. Sci., 56(4), pp. 1221–1227. [CrossRef]
Wang, G.-X., Lin, S.-X., Mo, W.-J., Peng, C.-L., and Yang, G.-H., 1986, “Kinetics of Combustion of Carbon and Hydrogen in Carbonaceous Deposits on Zeolite-Type Cracking Catalyst,” Ind. Eng. Chem. Process Des. Dev., 25(3), pp. 626–630. [CrossRef]
Dryer, F. L., and Glassman, I., 1973, “High-Temperature Oxidation of CO and CH4,” 14th Symposium International on Combustion, Combustion Institute, p. 987.

Figures

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Fig. 7

Average solid volume fraction and pressure drop profiles along regenerator height

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Fig. 5

Contour of solid (catalyst) volume fraction over time

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Fig. 6

Average solid volume fractions over time

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Fig. 1

Computational domain

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Fig. 2

Solid bed at t = 0 s

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Fig. 3

Solid volume fraction profiles along the regenerator height by using different mesh sizes

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Fig. 4

Solid volume fraction profiles along the regenerator height by using different drag models

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Fig. 8

Mass-weighted average temperature over time

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Fig. 9

(a) Gas temperature contours and (b) average gas temperature at time 1000 s

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Fig. 10

Profiles of solid temperature and species mass fractions at 1000 s

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