An investigation on the Effect of Continuous Phase Height on the First and Second Critical Rotor Speeds in a Rotary Disc Contactor
A Rotary Disc Contactor with inner diameter of
9.1cm and maximum operating height of 40cm has been used to
investigate break up phenomenon. Water-Toluene, Water as
continuous phase and Toluene as dispersed phase, was selected as
chemical system in the experiments. The mentioned chemical system
has high interfacial tension so it was possible to form big drops
which permit accurate investigation on break up phenomenon as well
as the first and second critical rotor speeds.
In this study, Break up phenomenon has been studied as a function
of mother drop size, rotor speed and continuous phase height. Further
more; the effects of mother drop size and continuous phase height on
the first and second critical rotor speeds were investigated. Finally,
two modified correlations were proposed to estimate the first and
second critical speeds.
[1] Drumm, C. and Bart, H. J., Hydrodynamics in a RDC extractor: single
and two-phase PIV measurements and CFD simulations, Chem. Eng.
Technol, 29, 11, 1297-1302, 2006.
[2] Kamath, M. S. and Subba Rau, M.G., Prediction of operating range of
rotor speeds for rotary disc contactors, The Canadian journal of chemical
engineering, 63, 578-584, 1985.
[3] Laddha, G.S. and Degaleesan, T.E., Transport Phenomena in Liquid-
Liquid Extraction, McGraw Hill, New York, 1976.
[4] Joaquim J.C., Apar─▒'cio, Manuel A.S. Jero'nim, Fernando G. Martins,
Manuel A.N. Coelho, Carlos Martins, Artur S. Braga, Carlos A.V. Costa,
Two different approaches for RDC modelling when simulating a solvent
deasphalting plant, Computers and chemical engineering, 26, 1369-
1377, 2002.
[5] Moreira, E., Pimenta, L. M., Carneiro, L. L., Faria R. C. L., Mansour, M.
B., Hydrodynamic Behavior of a Rotating Disc Contactor Under Low
Agitation Conditions, Chem. Eng. Comm, 192, 1017-1035, 2005.
[6] Kung, E. Y. and Beckmann, R. B., Transport Phenomena in Liquid-
Liquid Extraction, Tata-McGraw Hill Publishing Co., New-Delhi, 1976.
[7] Kannappan, R., Hydrodynamics and mass transport in rotary disc
contactors, Ph.D thesis, University of Madres, 1973.
[8] Khadivparsi, P, Simulation of rotary disc contactors for industrial and
semi industrial processes,. MSc thesis, University of Tehran, 1993.
[9] Bahmanyar, H. and Slater, M. J., Studies of drop break up in liquidliquid
systems in a rotary disc contactor, part I: conditions of no mass
transfer, Chemical engineering technology, 14, 79-89, 1991.
[10] Tong, J. and Furusaki, S., Mean drop size and size distribution in
rotating disc contactor use for reversed micellar extraction of proteins,
Journal of chemical engineering of Japan, 28, 5, 582-589, 1995.
[1] Drumm, C. and Bart, H. J., Hydrodynamics in a RDC extractor: single
and two-phase PIV measurements and CFD simulations, Chem. Eng.
Technol, 29, 11, 1297-1302, 2006.
[2] Kamath, M. S. and Subba Rau, M.G., Prediction of operating range of
rotor speeds for rotary disc contactors, The Canadian journal of chemical
engineering, 63, 578-584, 1985.
[3] Laddha, G.S. and Degaleesan, T.E., Transport Phenomena in Liquid-
Liquid Extraction, McGraw Hill, New York, 1976.
[4] Joaquim J.C., Apar─▒'cio, Manuel A.S. Jero'nim, Fernando G. Martins,
Manuel A.N. Coelho, Carlos Martins, Artur S. Braga, Carlos A.V. Costa,
Two different approaches for RDC modelling when simulating a solvent
deasphalting plant, Computers and chemical engineering, 26, 1369-
1377, 2002.
[5] Moreira, E., Pimenta, L. M., Carneiro, L. L., Faria R. C. L., Mansour, M.
B., Hydrodynamic Behavior of a Rotating Disc Contactor Under Low
Agitation Conditions, Chem. Eng. Comm, 192, 1017-1035, 2005.
[6] Kung, E. Y. and Beckmann, R. B., Transport Phenomena in Liquid-
Liquid Extraction, Tata-McGraw Hill Publishing Co., New-Delhi, 1976.
[7] Kannappan, R., Hydrodynamics and mass transport in rotary disc
contactors, Ph.D thesis, University of Madres, 1973.
[8] Khadivparsi, P, Simulation of rotary disc contactors for industrial and
semi industrial processes,. MSc thesis, University of Tehran, 1993.
[9] Bahmanyar, H. and Slater, M. J., Studies of drop break up in liquidliquid
systems in a rotary disc contactor, part I: conditions of no mass
transfer, Chemical engineering technology, 14, 79-89, 1991.
[10] Tong, J. and Furusaki, S., Mean drop size and size distribution in
rotating disc contactor use for reversed micellar extraction of proteins,
Journal of chemical engineering of Japan, 28, 5, 582-589, 1995.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:53758", author = "Hoda Molavi and Sima Hoseinpoor and Hossein Bahmanyar", title = "An investigation on the Effect of Continuous Phase Height on the First and Second Critical Rotor Speeds in a Rotary Disc Contactor", abstract = "A Rotary Disc Contactor with inner diameter of
9.1cm and maximum operating height of 40cm has been used to
investigate break up phenomenon. Water-Toluene, Water as
continuous phase and Toluene as dispersed phase, was selected as
chemical system in the experiments. The mentioned chemical system
has high interfacial tension so it was possible to form big drops
which permit accurate investigation on break up phenomenon as well
as the first and second critical rotor speeds.
In this study, Break up phenomenon has been studied as a function
of mother drop size, rotor speed and continuous phase height. Further
more; the effects of mother drop size and continuous phase height on
the first and second critical rotor speeds were investigated. Finally,
two modified correlations were proposed to estimate the first and
second critical speeds.", keywords = "Breakage, First critical rotor speed, Rotary disccontactor, Second critical rotor speed", volume = "4", number = "1", pages = "41-6", }