Abstract
Mathematical modeling is performed for the operation of two units of industrial chemical fluidized-bed reactors with different gas feedstock injection devices, i.e, three toroidal rings with nozzles in unit 1 and a false bottom with nozzles distributed over it in unit 2. Efficiency is analyzed (using the target product (iso-butylene) yield) for the operation of the two units over 4 months under industrial conditions and revealed the higher efficiency of unit 2. To dedetrmine the reasons for different product yields in the two units, a numerical solution is found by mathematical modeling to obtain characteristic pictures of catalyst particle concentrations and temperature fields in these units. It is concluded that unit 2 is characterized by a more uniform and dense distribution of the catalyst along with more uniform heating of the reactor. Pictures of the principal catalyst circulation flows are plotted to explain the considerable difference between the catalyst concentrations and gas temperature fields. Based on the numerical solution, the operational efficiency of the two units is subjected to comparative analysis, which showed good agreement with the results from an analysis of industrial reactors. The approach used in this work could be used in designing new units and optimizing existing units.
Similar content being viewed by others
References
Fluidization, Davidson, J.F. and Harrison, D., Eds., New-York: Academic Press, 1971.
Protod’yakonov, I.O. and Chesnokov, Yu.G., Gidromekhanika psevdoozhizhennogo sloya (Fluidized Bed Hydromechanics), Leningrad: Khimiya, 1982.
Gidaspow, D., Multiphase Flow and Fluidization, Boston: Academic Press, 1994.
Jackson, R., The Dynamics of Fluidized Particles, Cambridge: Cambridge University Press, 2000.
Gibilaro, L.G., Fluidization Dynamics, London: Butterworth-Heinemann, 2001.
Gel’perin, N.I., Ainshtein, V.G., and Kvasha, V.B., Osnovy tekhniki psevdoozhizheniya (Principles of Fluidization Technique), Moscow: Khimiya, 1967.
Mukhlenov, I.P., Sazhina, B.S., and Frolova, V.F., Raschety apparatov kipyashchego sloya (Calculations of Fluidized Bed Apparatuses), Leningrad: Khimiya, 1986.
Kunii, D. and Levenspiel, O., Fluidization Engineering, London: Butterworth-Heinemann, 1991.
Kravtsov, A.V., Ivanchina, E.D., Ivashkina, E.N., Kostenko, A.V., Yur’ev, E.M., and Beskov, V.S., Katal. Promsti, 2008, no. 6, p.41.
Ivashkina, E.N., Frantsina, E.V., Romanovskii, R.V., Dolganov, I.M., Ivanchina, E.D., and Kravtsov, A.V., Catal, Ind., 2012, vol. 4, no. 2, pp. 110–120.
Gyngazova, M.S., Kravtsov, A.V., Ivanchina, E.D., Korolenko, M.V., and Chekantsev, N.V., Chem. Eng. J., 2011, vols. 176–177, pp. 134–143.
Frantsina, E.V., Ivashkina, E.N., Ivanchina, E.D., and Romanovskii, R.V., Chem. Eng. J., 2014, vol. 238, pp. 129–139.
Egorov, A.G., Gilmanov, Kh.Kh., Lamberov, A.A., and Urtyakov, P.V., Catal. Ind., 2014, vol. 6, no. 4, pp. 283–291.
Chalermsinsuwan, B, Samruamphianskun, T., and Piumsomboon, P., Chem. Eng. Res. Des., 2014, vol. 92, no. 11, pp. 2479–2492.
Deb, S. and Tafti, D.K., Particuology, 2014, vol. 16, pp. 19–28.
Zhuang, Y.-Q., Chen, X.-M., Luo, Z.-H., and Xiao, J., Comput. Chem. Eng., 2014, vol. 60, pp. 1–16.
Shuai, W., Tianyu, Z., Guodong, L., Huilin, L., and Liyan, S., Fuel, 2015, vol. 139, pp. 646–651.
Upadhyay, M. and Park, J.-H., Powder Technol., 2015, vol. 272, pp. 260–268.
Lebedev, N.N., Khimiya i tekhnologiya osnovnogo organicheskogo i neftekhimicheskogo sinteza (Basic Organic and Petrochemical Synthesis: Chemistry and Technology), Moscow: Khimiya, 1981.
Tyuryaev, I.Ya., Fiziko-khimicheskie i tekhnologicheskie osobennosti polucheniya divinila iz butana i butilena (Physicochemical and Engineering Aspects of the Synthesis of Divinyl from Butane and Butylene), Leningrad: Khimiya, 1965.
Bowen, R.M., in Continuum Physics, Eringen, A.C., Ed., New-York: Academic Press, 1976, vol. 3, pp. 1–127.
Ding, J. and Gidaspow, D., AICHE Journal, 1990, vol. 36, no. 4, pp. 523–538.
Schiller, L. and Naumann, Z., Z. Ver. Deutsch. Ing., 1935, vol. 77, p.318.
Syamlal, M. and O’Brien, T.J., AIChE Symp. Ser., 1989, vol. 85, pp. 22–31.
Syamlal, M., The Particle-Particle Drag Term in a Multiparticle Model of Fluidization, Morgantown, WV: EG & G Washington Analytical Service Center, 1987.
Lun, C.K.K., Savage, S.B., Jeffrey, D.J., and Chepurniy, N., J. Fluid Mech., 1984, vol. 140, pp. 223–256.
Ranz, W.E. and Marshall, W.R., Chem. Eng. Prog., 1952, vol. 48, no. 4, pp. 173–180.
Gunn, D.J., Int. J. Heat Mass Transfer, 1978, vol. 21, no. 4, pp. 467–476.
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © S.A. Solov’ev, A.G. Egorov, A.A. Lamberov, S.R. Egorova, A.N. Kataev, 2015, published in Kataliz v Promyshlennosti.
Rights and permissions
About this article
Cite this article
Solov’ev, S.A., Egorov, A.G., Lamberov, A.A. et al. Effect of the design of a feedstock injection device in a fluidized-bed reactor on the efficiency of the reaction using the dehydrogenation of iso-paraffins in a fluidized chromia–alumina catalyst bed as an example. Catal. Ind. 8, 48–55 (2016). https://doi.org/10.1134/S207005041601013X
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S207005041601013X