Behzad, F., Bahmanyar, H., Mousavian, S.M.A., Molavi, H., Fogh, F., 2016. Local Static Hold-up in a Rotary Sieved Disc Contactor for a Butyl Acetate-water System. International Journal of Technology. Volume 7(1), pp. 149-157
|Fatemeh Behzad||Surface Phenomena and Liquid-Liquid Extraction Research Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, Keshavarz Blvd., No. 37, Ghods St., Iran|
|Hossein Bahmanyar||Surface Phenomena and Liquid-Liquid Extraction Research Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, Keshavarz Blvd., No. 37, Ghods St., Iran|
|Seyed Mohammad Ali Mousavian||Surface Phenomena and Liquid-Liquid Extraction Research Laboratory, School of Chemical Engineering, College of Engineering, University of Tehran, Keshavarz Blvd., No. 37, Ghods St., Iran|
|Hoda Molavi||Chemistry & Process Department, NRI (Niroo Research Institute), Poonak, Tehran, Iran|
|Fatemeh Fogh||Chemistry & Process Department, NRI (Niroo Research Institute), Poonak, Tehran, Iran|
Considering the importance of liquid static holdup in liquid-liquid extraction columns, a novel experimental approach for predicting the mentioned parameter in a rotary sieved disc contactor has is presented in this research. One chemical system without mass transfer was used, in which distilled water and butyl acetate were employed as the continuous and the dispersed phase, respectively. The static holdup has been measured using the draining method. Based on the experimental results, one correlation was proposed to predict the static holdup as a function of stage position in the column and rotating speed in the form of Reynolds numbers and also the dimensionless mother drop size. Changes in static holdup caused by each factor have been discussed and graphically illustrated. It was revealed that an increase in mother drop size will cause the growth of static holdup, while the rise of rotating speed will decrease the amount of static holdup. Furthermore, it was proven that static holdups in upper positions in the column are less than those in the lower positions.
Hold-up, Mother drop size, Rotary Sieved Disc Contactor, Static hold-up
Attarakih, M.M., Bart, H.J., Lagar, L.G., Fagir, N.M., 2006. A Windows-based Program for Hydrodynamics Simulation of Liquid-liquid Extraction Columns. Chem. Eng. Process, Volume 45, pp. 113–123
Behzad, F., Bahmanyar, H., Molavi, H., Manafi, S., 2015. Mean Drop Diameter in a Rotating Sieved Disc Contactor. Int. J. Tech., Volume 6, pp. 31–43
Kamath, M.S., Subba Rau, M.G., 1985. Prediction of Operating Range of Rotor Speeds for Rotary Disc Contactors. Can. J. Chem. Eng., Volume 63, pp. 578–584
Kasatkin, A.G., Kagon, S.Z., Trukhanov, V.G., 1962. The Hydrodynamic Characteristics of Rotary Disc Extractors. J. Appl. Chem., Volume 35, pp. 1903
Krishnaiah, M.M., Pai, M.U., Rao, M.V.R., Sastri, S.R.S., 1967. Performance of a Rotating Disk Contactor with Perforated Rotors. British Chemical Engineering, Volume 12, pp. 719–721
Kulkarni, A.A., Gorasia, A.K., Ranade, V.V., 2007. Hydrodynamics and Liquid Phase Residence Time Distribution in Mesh Microreactor. Chem. Eng. Sci., Volume 62, pp. 7484–7493
Laddha, G.S., Degaleesan, T.E., 1976. Transport Phenomena in Liquid-liquid Extraction. New York: McGraw Hill
Moris, M.A, Diez, F.V., Coca, J., 1997. Hydrodynamics of a Rotary Disc Contactor. Separation and Purification Technology, Volume 11, pp. 79–92
Molavi, H., Hossinpoor, S., Bahmanyar, H., Shariati-Niasar, M., 2010. Investigation on Local Static Hold-up in Liquid–liquid Systems in a Rotary Disc Contactor. Can. J. Chem. Eng., Volume 63, pp. 578–584
Molavi, H., Hoseinpour, S., Bahmanyar, H., 2011. Investigation on Local and Average Static Hold-ups in Liquid-Liquid Systems in a Rotary Disc Contactor. Can. J. Chem. Eng., Volume 89(6), pp. 1464–1472
Napeida, M., Haghighi Asl, A., Safdari, J., Torab-Mostaedi, M., 2009. Holdup and Characteristic Velocity in a Hanson Mixer-settler Extraction Column. Chem. Eng. Res. Des., Volume 88, pp. 703–711
Reman, G.H., Olney, R.B., 1955.00 The Rotating Disc Contactor a New Tool for Liquid-liquid Extraction. Chem. Eng. Prog., Volume 51, pp. 141–146
Schmidt, S.A., Simon, M., Attarakih, M.M., Larger, L.G., Bart, H.J., 2006. Droplet Population Balance Modelling—hydrodynamics and Mass Transfer. Chem. Eng. Sci., Volume 61, pp. 246–256.
Soltanali, S., 2007. Investigation of Hydrodynamic Parameters in RSDC Columns. M.S. Thesis, Tehran University, Iran
Slater, M.J., Goldfrey, J.C., 1994. Liquid-Liquid Extraction Equipment. New York: John Wiley and Sons. Inc.
Treybal, R.E, 1963. Liquid Extraction. New York: McGraw Hill Pub. Co.
Westerterp, K.R., Van Swaaij, W.P.M., Beenackers, A.A.C.M., 1984. Chemical Reactor Design and Operation. New York: Wiley
Yin, F., Afacan, A., Nandakumar, K., Chuang, K.T., 2002. Liquid Holdup Distribution in Packed Columns: Gamma Ray Tomography and CFD Simulation. Chem. Eng. Process, Volume 41, pp. 473-483
Zhang, S.H., Ni, X.D., Su, Y.F., 1981. Axial Mixing and Mass Transfer in Rotary Disc Contactors. Can. J. Chem. Eng., Volume 59, pp. 573–583