[1] 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. 

[2] 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. 

[3] 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. 

[4] Saxena, A.C., and Saxena, S.C., (1990), ”Bubble Size Distribution in Bubble columns”, Can. J. Chem. Eng., 68, 159- 161. 

[5] 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. 

Tikrit Journal of Engineering Sciences (2006) 13(4) 73-95

Bubbles Coalescence Frequency and Transition Concentration in Bubble Column

Fadi Z. Hanna Ihsan b. Hamawand
Chemical Eng. Dept., University of Technology, Iraq


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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KeywordsDispersion Column, Bubble Coalescence, Transition Concentration.

How to cite

TJES: Hanna FZ, Hamawand IB. Bubbles Coalescence Frequency and Transition Concentration in Bubble ColumnTikrit Journal of Engineering Sciences 2006; 13(4): 73-95.
APA: Hanna, F. Z., & Hamawand, I. B. (2006). Bubbles Coalescence Frequency and Transition Concentration in Bubble Column. Tikrit Journal of Engineering Sciences, 13(4), 73-95.