title: Axial dispersion, holdup and slip velocity of dispersed phase in a pulsed sieve plate extraction column by radiotracer residence time distribution analysis.
abstract: Axial dispersion, holdup and slip velocity of dispersed phase have been investigated for a range of dispersed and continuous phase superficial velocities in a pulsed sieve plate extraction column using radiotracer residence time distribution (RTD) analysis. Axial dispersion model (ADM) was used to simulate the hydrodynamics of the system. It has been observed that increase in dispersed phase superficial velocity results in a decrease in its axial dispersion and increase in its slip velocity while its holdup increases till a maximum asymptotic value is achieved. An increase in superficial velocity of continuous phase increases the axial dispersion and holdup of dispersed phase until a maximum value is obtained, while slip velocity of dispersed phase is found to decrease in the beginning and then it increases with increase in superficial velocity of continuous phase.
authors.affiliation: Department of Nuclear Engineering, Pakistan Institute of Engineering and Applied Sciences, Nilore, Islamabad, Pakistan. fac192@pieas.edu.pk
authors.forename: Ghiyas Ud
authors.initials: GU
authors.lastname: Din
authors.forename: Imran Rafiq
authors.initials: IR
authors.lastname: Chughtai
authors.forename: Mansoor Hameed
authors.initials: MH
authors.lastname: Inayat
authors.forename: Iqbal Hussain
authors.initials: IH
authors.lastname: Khan
mesh_terms: D005591:Chemical Fractionation / Q000295:instrumentation* / Q000379:methods*; D003198:Computer Simulation; D004867:Equipment Design; D017022:Flow Injection Analysis / Q000379:methods*; D006207:Half-Life; D015233:Models, Statistical; D011868:Radioisotopes / Q000302:isolation & purification*; D012212:Rheology / Q000379:methods*; D016008:Statistical Distributions; D014462:Ultrafiltration / Q000295:instrumentation / Q000379:methods
chemical_list: D011868:Radioisotopes