Radiotracer investigations to study the hydrodynamic characteristics of continuous phase in a pulsed sieve plate extraction column
1 Isotope Applications Division, Pakistan Institute of Nuclear Science and Technology [PINSTECH], P.O Nilore, Islamabad, Pakistan
2 Department of Chemical Engineering, Pakistan Institute of Engineering and Applied Sciences [PIEAS], P.O Nilore, Islamabad, Pakistan
3 Division of Physical and Chemical Sciences, Department of Nuclear Sciences and Applications, International Atomic Energy Agency [IAEA], Vienna, Austria
The present investigations are focused to study the hydrodynamic characteristics of continuous phase in a pulsed sieve plate extraction column using 68Ga in the form of gallium chloride from an industrial radionuclide generator (68Ge/68Ga). Labeling of water with the subject radiotracer in water-kerosene environment was evaluated. Experiments for Residence Time Distribution (RTD) analysis were carried out for a range of dispersed phase superficial velocities in a liquid-liquid extraction pulsed sieve plate column operating in the emulsion regime with water as continuous and kerosene as dispersed phase. Axial Dispersion Model (ADM) was used to simulate the hydrodynamic characteristics of continuous phase. It has been observed that the axial mixing in the continuous phase decreases and slip velocity increases with increase in superficial velocity of dispersed phase while the holdup of continuous phase was found to decrease with increase in superficial velocity of dispersed phase. ADM with open-open boundary condition was found to be a suitable model for the subject system.
© Owned by the authors, published by EDP Sciences, 2013
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.