Bubbles Coalescence Frequency and Transition Concentration in Bubble Column
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Abstract
Bubbles coalescence frequency and the transition concentration in a dispersion column were studied experimentally by using ethanol-water mixture as a liquid phase and air as a gas phase. The study was devoted to express the effect of the liquid properties on the performance of the dispersion column, and the experimental work was designed for this purpose, where the range of weight percent of ethanol in water, (0.1-0.7) Wt%, and the range of superficial gas velocity of air, (2.5-30) mm/s. The experimental runs were planned using the central composite routable design method. The experimental data obtained agreed quite well with a polynomial type of correlations by using computer program. The experimental data shows that the values of bubble coalescence decrease with increasing superficial gas velocity of air, and ethanol transition concentration was successfully correlated as a function of the superficial gas velocity of air,
ct= 0.158214 − 0.010849Ug + 0.00045Ug2 − 0.000008Ug3 . This equation gives mean deviation of 10.393%.
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References
Heijnen, J.J., and Riet, K.V., (1984), ”Mass Transfer, Mixing and Heat Transfer Phenomena in Low Viscosity Bubble Column Reactors”, Chem. Eng. J., 28, B21-B42. DOI: https://doi.org/10.1016/0300-9467(84)85025-X
Shah, T.T., Kelkar, B.G., Godbole, S.P., and Deckwer, W.-D., (1982), ”Design Parameters Estimations for Bubble Column Reactors”, AIChE J., 28(3), 354-379. DOI: https://doi.org/10.1002/aic.690280302
Akita, K., and Yoshida, F., (1974), ”Bubble Size, Interfacial Area, and Liquid Phase Mass Transfer Coefficients in Bubble Columns”, Ind. Eng. Chem. Proc. Des. Dev., 13, 84. DOI: https://doi.org/10.1021/i260049a016
Saxena, A.C., and Saxena, S.C., (1990), ”Bubble Size Distribution in Bubble columns”, Can. J. Chem. Eng., 68, 159- 161. DOI: https://doi.org/10.1002/cjce.5450680119
Posarac, D., and Tekic, M.N., (1987), ”Gas Holdup and Volumetric Mass Transfer Coefficient in Bubble Columns with Dilute Alcohol Solutions”, AIChE J., 33(3), 497-499. DOI: https://doi.org/10.1002/aic.690330316
Ruzicka, M.C., Drahos, J., Fialova, M., and Thomas, N.H., (2001), ”Effect of Bubble Column Dimensions on Flow Regime Transition”, Chem. Eng. Sci., 56, 6117-6124. DOI: https://doi.org/10.1016/S0009-2509(01)00215-9
Zahradnik, J., Kuncova, G.,and Fialova, M., (1999), ”The Effect of Surface Active Additives on Bubble Coalescence and Gas Holdup in Viscous Aerate Batches”, Chem. Eng. Sci., 54, 2401- 2408. DOI: https://doi.org/10.1016/S0009-2509(98)00305-4
Kim, J.W., and Lee, W.K., (1987), ”Coalescence Behavior of Two Bubbles in Stagnant Liquids”, J. Chem. Eng. Japan., 20(5), 448-453. DOI: https://doi.org/10.1252/jcej.20.448
Marrucci, G., and Nicodemo, L., (1967), ”Coalescence of Gas Bubbles in a Aqueous Solutions of in Organic Electrolytes”, Chem. Eng. Sci., 22, 1257-1265. DOI: https://doi.org/10.1016/0009-2509(67)80190-8
Zahradnik, J., Fialova, M., Kastanek, F., Green, K.D., and Thomas, N.H., (1995), ”The Effect of Electrolytes on Bubble Coalescence and Gas Holdup in Bubble column Reactors”,Trans IchemE., 73, 341-346.
Lessard, R.D., and Zieminski, S.A., (1971), ”Bubble Coalescence and Gas Transfer in Aqueous Electrolytic Solutions”, Ind. Eng. Chem. Fundam., 10, 260-289. DOI: https://doi.org/10.1021/i160038a012
Jeng, J.J., Maa, J.R., and Yang, Y.M., (1986),”Surface Effects and Mass Transfer in Bubble Column”, Ind. Eng. Chem. Process Des. Dev., 25(4), 974-978. DOI: https://doi.org/10.1021/i200035a023
Montgomery, D.C., 1976, “Design and Analysis of Experiments”, John Wiley and Sons, New York, Chap. 15, 445- 461.
Peters, M. S., and Timmerhaus, K. D., 1968, “Plant Design and Economics for Chemical Engineers”, Mc Graw-Hill, Kogakusha, 2nd ed., Chap. 16, 702.
Keitel, G., and Onken, U., (1982), ”Inhibition of Bubble Coalescence by Solutes in Air/Water Dispersions”, Chem. Eng. Sci., 37(11), 1635-1638. DOI: https://doi.org/10.1016/0009-2509(82)80033-X
Wilkinson, P.M., Spek, A.P. ,and Van Dierendonck, L.L., (1992), ”Design Parameters Estimation for Scale-Up of High Pressure Bubble Columns”, AIChE J., 38, 544-554. DOI: https://doi.org/10.1002/aic.690380408
Zahradnik, J., and Fialova, M., (1996), ”The Effect of Bubbling Regime on Gas and Liquid Phase Mixing in Bubble Column Reactors”, Chem. Eng. Sci. 51(10), 2491-2500. DOI: https://doi.org/10.1016/0009-2509(96)00107-8
Zahradnik, J., Fialova, M., Ruzicka, M., Drahos ,J., Kastanek, F., and Thomas, N.H., (1997),”Duality of The Gas-Liquid Regimes in Bubble Column Reactors”, Chem. Eng. Sci., 52(21/22),3811-3826. DOI: https://doi.org/10.1016/S0009-2509(97)00226-1