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2 edition of Performance of a gas dispersed pulsed extraction column found in the catalog.

Performance of a gas dispersed pulsed extraction column

Manouchehr Nikkhou

Performance of a gas dispersed pulsed extraction column

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Published by University ofBirmingham in Birmingham .
Written in English


Edition Notes

Thesis (Ph.D)-University of Birmingham, Dept of Chemical Engineering.

Statementby Manouchehr Nikkhou.
ID Numbers
Open LibraryOL13891176M

This work applied a pulsed sieve plate column in conjunction with liquid-liquid extraction technique to remove arsenic from natural gas condensate. efficiency of thorium extraction by primary amines as a function of pulse frequency and amplitude in a pulsed sieve -plate column by bernard eric davis.


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Performance of a gas dispersed pulsed extraction column by Manouchehr Nikkhou Download PDF EPUB FB2

Abstract - Mass transfer performance is presented for a 76 mm diameter pulsed disc and doughnut extraction column for the toluene-acetone-water system. The experiments were carried out for both mass transfer directions.

The mass transfer data are interpreted in terms of the axial diffusion model, thus accounting for continuous phase axial dispersion. Dispersed phase holdup has been measured in a 76 mm diameter pulsed disc and doughnut extraction column for three different liquid-liquid systems.

Axial dispersion in pulsed‐, perforated‐plate extraction columns. Leanne M. Prvcic. Department of Chemical Engineering, University of Melbourne, Parkville, VictoriaAustralia.

Search for more papers by this author. Clive Pratt. However, some industrial columns have been found to have higher extraction efficiency while running with Performance of a gas dispersed pulsed extraction column book pulsation.

In this study, axial dispersion coefficients in the continuous phase were measured under pulsing and nonpulsing conditions using a mm diameter disc Performance of a gas dispersed pulsed extraction column book doughnut solvent extraction by: 1.

If drops of a dispersed phase can be coalesced and dispersed continuously while flowing through a column, the mass transfer can be greatly enhanced. Therefore, special sieve plates (called coalescence plates), which can enhance the coalescence of drops, are inserted into a pulsed sieve extraction (PSE) column to supplant standard sieve by: Removal of a saturated amount of tributyl phosphate (TBP) from a nuclear reprocessing aqueous waste stream is very important as far as economy of process as well as waste disposal is concerned.

The present research work describes the detailed mass transfer studies for the removal of TBP from aqueous stream in a geometrically optimized pulsed sieve plate extraction column (PSPEC).

The original. Amir Bahmanyar, Nafiseh Khoobi, Mohammad Reza Mozdianfard and Hossein Bahmanyar, The influence of nanoparticles on hydrodynamic characteristics and mass transfer performance in a pulsed liquid–liquid extraction column, Chemical Engineering and Processing: Process Intensification, 50,(), ().

Performance of a gas dispersed pulsed extraction column book Axial dispersion, holdup and slip velocity of dispersed phase Performance of a gas dispersed pulsed extraction column book a pulsed sieve plate extraction column by radiotracer residence time distribution analysis.

Applied Radiation and Isotopes66 (12), DOI: /so N Bardin-Monnier, P Guiraud, C by: sumption in a particular type of liquid extraction columns, namely pulsed extraction columns with internals of discs and rings (dough-nuts), abbreviated further as DRC.

Till now the pulsed flow in these columns has been regarded as equivalent to a permanent one at the same velocity level. Our task was to examine the impact of the peri. performance of the chromatography system and, therefore, the ultimate performance of the analytical method. Because of the great variety of columns and the diversity of samples that can be analyzed with modern gas chromatography, several injection modes are.

Mass transfer, static and dynamic hold-ups have been investigated in a pulsed extraction. Column in presence of nanoparticles in dispersed phase. Static and dynamic dispersed phase hold-ups increased by 23–% and 23–%, respectively. Mass transfer enhanced in nanofluids. Marked influence on droplet coalescence at vol% of by: In order to make use of correlations pertaining to predicting the pressure drop in gas–liquid form in packed columns, first the closest gas–liquid flow regime to the flow regime existing in a pulsed packed liquid–liquid extraction column; that is, a dispersed regime, should be identified, because under gas–liquid flow, pressure drop varies according to the regime (Khan Performance of a gas dispersed pulsed extraction column book Varma, ).Cited by: 7.

In a pulse column, liquids are continuously fed to the column and flow counter-currently, as is done with a packed column, but mechanical energy is applied to pulse the liquids in the column up and down.

This is normally done by injecting pressurized air into a pulse leg that pushes liquid into the column, then venting the pulse leg to fill the.

Extraction columns have many types, including a rotating disc contactor column (RDC), pulsed column, packed column, and sieve tray column [5]. Centrifugal extractors employ a Author: Swati Mohanty. state performance of pulsed extraction columns. In other part of this doctoral thesis work, the steady state performance of extraction columns is studied taking into account the effect of dispersed phase inlet condition (light or heavy phase is dispersed) and the direction of mass transfer (from continuous to dispersed phase and vice versa).

A study of backmixing in the continuous phase has been presented for a 50 mm diameter Karr reciprocating-plate extraction column using the two-phase system kerosene/tributyl phosphate (continuous)−phenol−water (dispersed).

The column was operated in the emulsion region with nylon plates of 45% open area. Backmixing was determined using the unsteady-state tracer injection Cited by: Dispersed phase hold-up and characteristic velocity in a pulsed packed extraction column Article (PDF Available) in Chemical Industry and Chemical Engineering Quarterly 18(2) April DISPERSED PHASE HOLD-UP AND CHARACTERISTIC VELOCITY IN A PULSED PACKED EXTRACTION COLUMN Dispersed phase hold-up has been measured in a mm diameter pulsed packed column for four different liquid-liquid systems.

The effects of pulsation intensity, phase ratio, and packing characteristic on the hold-up have been. Dispersed Phase Holdup in a Pulsed Disc and Doughnut Extraction Column Brazilian Journal of Chemical Engineering Vol.

28, No. 02, pp. -April - June, Table 1: Physical properties of liquid systems at 20°C (Míšek et al., ; Jahya et al., ). The energy input can be performed either by rotation or by pulsation. Extraction columns with rotating internal parts are divided into mixing and separation zones.

On a vertical shaft stirrers are mounted in the mixing zones giving an intensive contact of the countercurrent flowing phases. Liquid-liquid extraction processes are widely used in different industries, especially in rare earth separation, hydrometallurgical processes, and the nuclear industry.

Optimal design of a solvent extraction column involves maximizing the column performance by increasing the rate of mass transfer while achieving high throughputs. Purchase Gas Chromatography - 1st Edition. Print Book & E-Book. ISBNFlooding Characteristics in Pulsed Packed Extraction Columns Brazilian Journal of Chemical Engineering Vol.

28, No. 04, pp. -October - December, The properties of the packings Cited by: The uranium extraction efficiency from sulfate leach liquor and the hydrodynamic behavior of the reactive extraction system was studied in the horizontal pulsed sieve-plated column.

The total holdup of dispersed organic phases in a pulsed sieve-plate solvent extraction column was intensively studied in one-column geometry to determine the actual phase velocities. The column was 2 inches in diameter and contained 43 plates with a 2-inch plate spacing. The experimental results for the dispersed phase overall mass transfer coefficient are compared with theoretical models and the models derived for pulsed sieve plate extraction columns.

The values of the average relative deviation (ARD) of the predicted values of the dispersed phase overall mass obtained by applying equations (1), (2), (3), (5.

Liquid–Liquid Extraction Column Module (LLECMOD) is a rigorous and comprehensive bivariate population balance framework for dynamic and steady-state modeling of liquid–liquid extraction columns.

Within LLECMOD, the user can simulate different types of extraction columns, including stirred and pulsed ones.

The basis of LLECMOD depends on stable robust numerical algorithms Cited by: in industry the use of packed columns (random or structured) for LLE applications will be in most cases found limited to operations where: • the density differences between the carriers is higher than 30 – 50 kg/m3 • the volumetric phase ratio between dispersed drop phase and continuous phase is in the magnitude of File Size: KB.

Accurate prediction of dispersed phase droplet behavior is crucial to the design and scaling‐up of an extraction column.

In this article, the dispersed droplet velocity algorithm and the diameter algorithm in a liquid–liquid two‐phase flow have been developed based on the bubble velocity model in gas–liquid two‐phase flow of Lucas [Measurement Science & Technology.

( Cited by: 1. Dispersed phase holdup has been measured in a 76 mm diameter pulsed disc and doughnut extraction column for three different liquid-liquid systems.

The effects of operational variables such as pulsation intensity and dispersed and continuous phase flow rates. One of the phases must be dispersed into droplets in the other, continuous phase to achieve a sufficiently large mass‐transfer interface.

Extraction is performed in mixer–settler equipment or extraction columns, which are frequently equipped with rotating internals or pulsators for energy input to positively influence droplet by: A study was made of the performance of an orifice plate pulse column which is essentially a spray column containing internal constrictions in the form of orifices.

The chemical system studied was acetic acid-waterhexone, and the variables considered were pulse frequency, throughput, phase continuity, and direction of solute transfer.

A preliminary investigation on performance of a pulsed packed column for liquid-liquid extraction was reported by Feick and Anderson (8). From the results reported by the previous investigators on perforated-plate towers and pulsed columns, it seems desirable to investigate a pulsed perforatedplate column for liquid-liquid extraction.

Pulsed Columns Unlike mixer-settlers, pulsed columns are contactors without individual extraction stages. They are continuous contactors, and a column is equivalent in work terms to several theoretical countercurrent-mounted stages.

The operating principle of a pulsed column consists of a solvent (light phase) circulating from theFile Size: KB. Hydrodynamic and mass transfer performance are presented for a mm diameter pulsed disc and doughnut column of the type used by Western Mining Corporation, Olympic Dam Operation, for the extraction of uranium from sulphate media using Alamine as extractant.

For the present purpose, g/L sulphuric acid was used as solute. The mass. PERFORMANCE OF A RECIPROCATING PACKED EXTRACTION COLUMN.

THOMAS VARDAMAN KONKLE. THESIS submitted to the faculty of the UNIVERSITY OF MISSOURI AT ROLLA in partial fulfillment of the requirements for the Degree of MASTER OF SCIENCE IN CHEMICAL ENGINEERING Rolla, Missouri. Approved by. Tray technology enhances extraction.

in aromatics service highlights the most important design considerations for enhancing capacity and efficiency in high-performance extraction sieve trays Waldo de Villiers and Jose L Bravo, Shell Global Solutions (US) Inc rotary agitated, reciprocating plate and pulsed columns, mixer-settlers, hollow.

dissolution, extraction, trapping, etc.), I didn’t set out to cover every single sample prep category. The book started out to be a small handbook like the popular. The LC Handbook: Guide to LC Columns and Method Development (Publication Number EN) but soon blossomed into a + page book covering many different sample preparation.

• The liquid flows down the column over the packing surface and the gas or vapor, counter-currently, up the column. Some gas-absorption columns are co-current • The performance of a packed column is very dependent on the maintenance of good liquid and gas distribution throughout the packed bed.

2 3. Make-up Gas for Capillary rd detectors required a total gas flow of ml/min for best sensitivity and peak shape2. Make-up gas is added as a supplement gas flow for the capillary column ( ml/min) to obtain a suitable flow The make-up gas can be the same as carrier gas or otherwise.

3 Introduction, Chromatography Pdf, and Instrument Calibration 4 5 Introduction 6 7 Analytical chemists have few tools as powerful as chromatography to 8 measure distinct analytes in complex samples.

The power of chromatography 9 comes from its ability to File Size: 1MB.Analysis of Performance of Packed Columns There are two packed column experiments in the Unit Operations lab: Liquid-Liquid Extraction (LLE) and Gas Absorption (GA).

In both of these experiments, a solute is removed from a carrier fluid and is absorbed by the solvent. The solvent is File Size: [email protected]{osti_, title = {Survey of simulation methods for modeling pulsed sieve-plate ebook columns}, author = {Burkhart, Ebook, abstractNote = {The report first considers briefly the use of liquid-liquid extraction in nuclear fuel reprocessing and then describes the operation of the pulse column.

Currently available simulation models of the column are reviewed, and followed by an.