A Study of Hydrodynamics in Liquid-liquid Extraction Columns PDF Download
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Author: Kenrick Randal Marx Ramlochan
Publisher:
ISBN:
Category :
Languages : en
Pages : 284
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Book Description
Author: Kenrick Randal Marx Ramlochan
Publisher:
ISBN:
Category :
Languages : en
Pages : 284
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Book Description
Author: Javad Saien Ghalehchian
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Albert Frank Seibert
Publisher:
ISBN:
Category : Extraction (Chemistry)
Languages : en
Pages : 180
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Author: Albert Frank Seibert (Jr.)
Publisher:
ISBN:
Category : Hydrodynamics
Languages : en
Pages : 180
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Author: Gurdip Singh Virdee
Publisher:
ISBN:
Category :
Languages : en
Pages : 206
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Book Description
TWO PHASE FLOW, HYDRODYNAMICS, DROP SIZE, FLUID FLOW, AXIAL MIXING, HEAT TRANSFER, HEAT EXCHANGERS, SPRAY COLUMNS, SURFACTANTS, ENTRAINMENT.
Author: A. Prabhakar
Publisher:
ISBN:
Category :
Languages : en
Pages : 309
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Author: Izdihar Abdul-Ahad Mani
Publisher:
ISBN:
Category :
Languages : en
Pages : 226
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Experimental results obtained on a small scale electrostatic liquid-liquid extraction column showed that electrostatic coalescence can effectively counterbalance the droplet dispersion caused by high shear mixing, thus enhancing the coalescence-redispersion cycle which increases the rate of surface renewal and also the rate of mass transfer. A fuller understanding of the inter-relationships between throughput, impeller speed, electric field strength was accomplished. The effect of rotor speed, voltage, total throughput and superficial phase flowrates upon hold-up were determined quantitatively Slip velocity was correlated as: Vs = Vk (l-h)m where (m) is a function of rotor speed and voltage. Three reg ons of column operation with regard to slip velocity were recognised, subcritical, critical and supercritical. Column mass transfer performance was determined in terms of the effects of rotor speed, voltage and total throughput. A new approach in expressing column performance based upon the coalescence-redispersion cycle presentation, mass transfer and overall available surface area, was achieved. Optimum column operation condition was found to be at: 2 kV, 2000 min-1, L min-1.
Author: T. Sekine
Publisher: Elsevier
ISBN: 0444596399
Category : Technology & Engineering
Languages : en
Pages : 870
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Book Description
Solvent extraction is employed very widely in both fundamental research and technology because of the remarkable features of this simple but very effective technique for the separation of different materials. The International Solvent Extraction Conference 1990 was a forum for the presentation of papers on up-to-date research in this field. The collection of the papers in these volumes will be invaluable because information on solvent extraction is often scattered in various journals and proceedings which make the following of developments difficult.
Author: Ningsheng Yang
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Simone Castellano
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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This PhD project deals with the study of the hydrodynamics of the dispersions in the liquid-liquid extractors employed in the nuclear recycle industry. In the first part of the project, a zero-dimensional homogenous Population Balance Model (0D-PBM), based on the evaluation of the volume-averaged coalescence and breakup rates, is adopted to fit low-viscosity turbulent liquid-liquid dispersion experiments. The method accounts for the spatial inhomogeneities in mixing, namely for the probability density function of the turbulent kinetic energy dissipation in the apparatus. In the second part of this study, a generalized model for the breakage and coalescence kernels, valid for the entire spectrum of turbulence, is proposed and validated. Most of the available kernels in literature indeed are based on the Kolmogorov second-order structure function, which is only valid in the inertial subrange. However, in many industrially encountered situations, most of the droplets may have size in the dissipation range, where the Kolmogorov second-order structure function does not apply. The generalized model is based on the Davidson second-order structure function, valid in the entire spectrum of turbulence. In the last part of the study, a model that allows to simulate the hydrodynamic behavior of a pulsed column is proposed. The model is based on a 1D Population Balance Equation (1D-PBE), whose source terms were modeled through the generalized Coulaloglou and Tavlarides kernels. The turbulent inhomogeneities in the pulsed column were accounted through the probability density function of the turbulent dissipation rate. The model well reproduces the experimental Sauter mean diameters and the dispersed phase volume fractions in a compartment of the pulsed column.
