Brzina tečnosti pri inverznoj fluidizaciji u barbotažnoj koloni sa kocentričnom cevi
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Apstrakt
U ovom radu su ispitane fluidodinamičke osobine ograničenog inverzno fluidizovanog sloja u barbotažnoj koloni (eng. airlift reactor) sa koncentričnom cevi, pri čemu je rad kolone u odnosu na tečnu fazu bio šaržnog tipa, a gas kontinualna faza. Inverzno fluidizovani sloj se formirao od relativno velikih čestica (4,3 mm – 5,4 mm) lakog polietilena, u prvom slučaju, i od čestica izuzetno lakog polistirena, u drugom slučaju. Uticaj osobina tečne faze (površinski napon i viskozitet) na fluidodinamičke karakteristike određen je korišćenjem koalescentno – inhibirajućeg medijuma (1% mas. vodeni rastvor etanola) i viskoznog medijuma (46% mas. vodeni rastvor šećera). Pokazano je da ukupan sadržaj gasa, minimalna brzina fluidizacije, indukovana brzina tečne faze i ekspanzija sloja zavise od prividne brzine gasa kao i od osobina tečne i čvrste faze.
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Reference
[2] Comte, M. P.; Bastoul, D.; Hebrard, G.; Roustan, M.; Lazarova, V. Hydrodynamics of a Three-Phase Fluidized Bed, the Inverse Turbulent Bed, Chem. Eng. Sci. 1997, 52, 3971-3977.
[3] Briens, C. L.; Ibrahim, Y. A.; Margaritis, A.; Bergougnou, M. A. Effect of Coalescence Inhibitors on the Performance of Three-Phase Inverse Fluidized-Bed Columns, Chem. Eng. Sci. 1999, 54, 4975-4980.
[4] Nikolov, L.; Karamanev, D. Experimental Study of the Inverse Fluidized Bed Biofilm Reactor, Can. J. Chem. Eng. 1987, 65, 214-217.
[5] Buffiere, P.; Bergeon, J-P.; Moletta, R. The Inverse Turbulent Bed: a Novel Bioreactor for Anaerobic Treatment, Wat. Res. 2000, 34, 673-677.
[6] Loh, K-C; Liu, J. External Loop Inversed Bed Airlift Bioreactor (EIFBAB) for Treating High Strength Phenolic Wastewater, Chem. Eng. Sci. 2001, 56, 6171-6176.
[7] Fan, L-S.; Muroyama, K.; Chern, S-H. Hydrodynamic Characteristics of Inverse Fluidization in Liquid-solid Systems, Chem. Eng. J. 1982, 24, 143-150.
[8] Chern, S. H.; Muroyama, K.; Fan, L. S. Hydrodynamics of Constrained Inverse Fluidization and Semifluidization in a Gas-Liquid-Solid System, Chem. Eng Sci. 1983, 38, 1167-1174.
[9] Albijanić, B.; Havran, V.; Petrović, D. Lj.; Äurić, M.; Tekić, M. N. Hydrodynamics and Mass Transfer in a Draft Tube Airlift Reactor with Dilute Alcohol Solutions, AIChE J. 2007, 53, 2897-2904.
[10] Chisti, M. Y. Airlift Bioreactors; Elsevier: London, 1989.
[11] Chakravarty, M.; Singh, H. D.; Baruah, J. N.; Iyengar, M. S. Liquid Velocity in a Gas- Lift Column, Indian Chem. Eng. 1974, 16, 17-22.
[12] Li, G. Q.; Yang, S. Z.; Cai, Z. L.; Chen, J. Y. Mass Transfer and Gas-Liquid Circulation in an Airlift Bioreactor with Viscous Non-Newtonian Fluids, Chem. Eng. J. 1995, 56, B101- B107.
[13] Hwang, S. J.; Cheng, Y. L. Gas Holdup and Liquid Velocity in Three-Phase Internal- Loop Airlift Reactors, Chem. Eng. Sci. 1997, 52, 3949-3960.
[14] Petrović, D. Lj. Hydrodynamics and Mass Transfer in a Three Phase Draft Tube Airlift Reactor, PhD Thesis, Faculty of Technology, Novi Sad, Serbia, 1989.
[15 Lee, J.C.; Sherrard, A. J.; Buckley, P. S. Optimum Particle Size in Three Phase Fluidized Bed Reactors, In Fluidization and its applications, Angelino, H. et al. Eds.; Cepadeus- Editions: Toulouse, 1974, p. 407.
[16] Kim, S. D.; Baker, C. G. J.; Bergougnou, M. A. Phase Holdup Characteristics of Three Phase Fluidized Beds, Can. J. Chem. Eng. 1975, 53, 134-139.
[17] Kawalec-Pietrenko, B. Liquid Circulation Velocity in the Inverse Fluidized Bed Reactor, Bioprocess Eng. 2000, 32, 397-402.
[18] Nikov, I.; Karamanev, D. Liquid-Solid Mass Transfer in Inverse Fluidized Bed, AIChE J. 1991, 37, 781-784.