Radiotracer investigations to study the hydrodynamic characteristics of continuous phase in a pulsed sieve plate extraction column

Din, Ghiyas Ud; Khan, Imran; Chughtai, Imran Rafiq; Inayat, Mansoor Hameed; Jin, J.

doi:10.1051/epjconf/20135001004

Cited by 4 publications

(7 citation statements)

References 15 publications

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“…This technology has been extensively employed to help unravel industrial hitches in advanced economies, but it is still underutilized in Global South nations due to the lack of radiotracers at the point of need. It is required to import radiotracers for Global South countries that do not have radioisotope manufacturing facilities, and the long amount of time needed in this process eliminates the prospect of realizing the prospective benefits of this technology [99]. The gap can be partially addressed by building or installing affordable neutron generators or sources and research reactors in these countries through local and international support.…”

Section: The Radiotracer Methodsmentioning

confidence: 99%

The State of Critical and Strategic Metals Recovery and the Role of Nuclear Techniques in the Separation Technologies Development: Review

et al. 2023

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The extraction of useful minerals or geological materials from the Earth’s crust, most typically from various sources, is crucial to a country’s development and progress. Mineral-rich countries use these resources to transform their economies and propel them toward long-term prosperity. There is an urgent need for the world to increase mineral exploration efforts, improve the recycling of important metal-containing resources, and extract them using upgraded hydrometallurgical procedures with high recovery efficiency. This review paper highlights the importance of strategic and critical metals in the economy and the role of nuclear techniques in the analysis, process optimization, and remediation of metals using solvent extraction, adsorption, and chromatographic resins. Radiotracer analysis, X-Ray Fluorescence spectrometry (XRF), Neutron Activation Analysis (NAA), and X-Ray Diffraction (XRD) are appropriate for improving laboratory-based hydrometallurgical processes, with future technical and economic benefits. The development and installation of novel instruments to provide the real-time control of mining and mineral processing plants for improved control have the potential to aid in the recovery of a broad range of metals.

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Section: The Radiotracer Methodsmentioning

confidence: 99%

The State of Critical and Strategic Metals Recovery and the Role of Nuclear Techniques in the Separation Technologies Development: Review

et al. 2023

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“…The liquid in a PSPC passes through the sieve perforations, whereas the liquid in a PDDC follows a tortuous flow path. Each of these columns has its own advantages and disadvantages. , Several studies have reported the pressure drop, axial dispersion, drop size distribution, and dispersed phase hold-up in the PSPC and PDDC. − The PDDC is employed for uranium recovery and purification at the front end, while the PSPC is employed for the back-end processes of the nuclear fuel cycle. Both columns play crucial roles in nuclear industry applications and have been studied extensively by researchers for their respective purposes. ,− …”

Section: Introductionmentioning

confidence: 99%

Single-Phase Flow Studies Using Radioactive Particle Tracking in an Air-Pulsed Column Having a Novel Plate Internal

Pillajetti,

Gupta,

Goswami

et al. 2023

Ind. Eng. Chem. Res.

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The transport processes in liquid−liquid extraction pulsed columns are significantly influenced by the localized flow field in the column. The localized flow field refers to the local timeaveraged velocity and fluctuations present within the pulsed column. To investigate the microscale flow field in the pulsed column, the radioactive particle tracking technique is employed. The flow characteristics for a single-phase flow are investigated in a pulsed column with a diameter of 75 mm. In this research, a novel slotted plate is employed as an internal component under pulsatile flow conditions. The study focuses on analyzing the single-phase hydrodynamics within the column for a range of pulsation velocities and water flow rates. Various flow parameters are computed for all of the experimental conditions to assess the effectiveness of the slotted plate within the pulsed column. The findings indicate that the pulsing action generates significant fluctuations in velocity, even at low mean flow velocities. Despite the predominance of axial flow velocity in the column, radial motion also plays an important role. The occurrence of overall downward flow reduces axial fluctuations, leading to the decreased axial root-mean-square velocity (RMS) and turbulent kinetic energy compared with those of no net flow. As the water flow increases, both axial and radial RMS velocities become of the same order, resulting in uniform and homogeneous mixing. Consequently, the slotted plate can be an advantageous baffle type for systems with high liquid throughput. The results from this study offer valuable insight into dispersion in both the radial and axial directions in pulsed columns employing slotted plates.

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“…Jiao et al proposed an empirical correlation to predict the overall mass transfer coefficient, which was in good agreement with the experimental values. Din et al used a radioisotope-based technique to study residence time distribution (RTD) and developed a dispersion model. They have mentioned axial mixing and holdup of the dispersed phase in a PSPC increased with an increase in pulsation frequency and amplitude.…”

Section: Introductionmentioning

confidence: 99%

“…Jiao et al 3 proposed an empirical correlation to predict the overall mass transfer coefficient, which was in good agreement with the experimental values. Din et al 17 Goswami et al 18 reported a single-phase RTD study in PSPC using a technetium (Tc-99m)-based radiotracer. Yadav et al 13 reviewed various published data on hydrodynamics and mass transfer performance of PSPC and commented on the suitability of different correlations to predict different dependent variables like mass transfer coefficient, holdup, and drop diameter.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Velocity Field Inside a Single-Phase Pulsed Sieve Plate Column Using Radioactive Particle Tracking

Pillajetti

Gupta

Goswami

et al. 2022

Ind. Eng. Chem. Res.

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Pulsed sieved plate columns (PSPCs) are used for liquid–liquid extraction processes in several industries such as mineral processing, pharmaceuticals, and nuclear fuel cycle. Despite their widespread use in the industry, there is a dearth of experimental insights into the local hydrodynamics in PSPC. This work for the first time reports the local hydrodynamics inside a PSPC using the radioactive particle tracking technique. Local instantaneous velocity, mean velocity, turbulent quantities such as root-mean square (rms) velocity, turbulent kinetic energy, and turbulent intensity are measured through the radioactive particle tracking technique. The effects of pulsing velocity and liquid flow rate on local hydrodynamics and turbulence parameters are studied for no net flow and single-phase flow conditions. Results indicate that the mean flow velocity is low; however, significant fluctuating velocity components are generated due to the pulsing action. Though the fluctuations in the axial direction dominate, significant radial velocity is observed in all of the cases. Further, results show that the fluctuations in the axial direction attenuate in the case of single-phase flow when compared with the no flow condition. This leads to lower axial rms velocity, turbulent kinetic energy, and turbulent intensity in the case of single-phase flow as compared with the no flow condition. In all of the cases, significant fluctuations are observed, which signify a higher degree of mixing and hence enhanced mass transfer in PSPCs.

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Radiotracer investigations to study the hydrodynamic characteristics of continuous phase in a pulsed sieve plate extraction column

Cited by 4 publications

References 15 publications

The State of Critical and Strategic Metals Recovery and the Role of Nuclear Techniques in the Separation Technologies Development: Review

The State of Critical and Strategic Metals Recovery and the Role of Nuclear Techniques in the Separation Technologies Development: Review

Single-Phase Flow Studies Using Radioactive Particle Tracking in an Air-Pulsed Column Having a Novel Plate Internal

Investigation of Velocity Field Inside a Single-Phase Pulsed Sieve Plate Column Using Radioactive Particle Tracking

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