Mass transfer at a rotating tubular packed bed of woven screens in relation to electrochemical and catalytic reactor design

Abdel‐Aziz, M.H.; Nirdosh, I.; Sedahmed, G.H.

doi:10.1016/j.ijheatmasstransfer.2015.06.075

Cited by 10 publications

(6 citation statements)

References 39 publications

(49 reference statements)

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“…This type of rotating cylinder electrode has high turbulence-promoting action due to its high surface area per unit volume. Abdel-Aziz [26] studied the mass transfer in this type and found that this type has a value of volumetric mass transfer coefficient greater than that obtained at smooth rotating cylinder. Therefore, the major purpose of the present research is to examine the performance of a modified design of this type of rotating cylinder electrode for copper removal.…”

Section: Introductionmentioning

confidence: 95%

“…Previous studies showed that the packed bed rotating cylinder electrode of woven wire meshes when compared with the other types of packed bed rotating cylinder electrodes, has a value of mass transport coefficient greater approximately by three times than those observed in smooth rotating electrode as a result of higher turbulencepromoting action of the meshes [24], however, the electrode thickness should be kept small for assuring the whole bed to be work under limiting current conditions [25]. Tubular packed bed of woven screens cylinder electrode is one of packed bed rotating cylinder electrodes that not be used before as a packed bed rotating cylinder electrode for heavy metals removal [26]. In this configuration, the cathode was constructed from a number of coaxial closely packed layers of vertical screen cylinders.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical removal of copper from a simulated wastewater using a rotating tubular packed bed of woven screens electrode Removal of heavy metals using packed bed rotating electrode

hemeidan

Abbar

2019

QJES

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Rotating cylinder electrodeWoven screens Copper removalResponse surface methodology A B S T R A C T Copper removal from simulated wastewater was investigated by using a rotating tubular packed bed of woven screens electrode as a cathode in a new design of the electrochemical reactor. The effects of electrolysis operating parameters like current (0.5-2.5 A), rotation speed (150-750 rpm), and initial copper concentration (100-500ppm) were investigated. Optimization of process parameters was carried out by adopting response surface methodology (RSM) combined with Box-Behnken Design (BBD), where copper removal efficiency was selected as a response function. The results indicated that the current has the main effect on the copper removal efficiency followed by rotation speed and concentration. The results of regression analysis revealed that the experimental data could be fitted to a second-order polynomial model with a value of determination coefficient (R 2 ) equal to 0.9894 and Fisher test at a value of 51.57. The optimum conditions of the process parameters based on RSM method were an initial copper concentration of 205 ppm, current of 2.5A, and rotation speed of 750 rpm utilizing cathode composed of screens with mesh no. 30 where a final copper concentration less than 2 ppm was obtained after 30 min.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Electrochemical removal of copper from a simulated wastewater using a rotating tubular packed bed of woven screens electrode Removal of heavy metals using packed bed rotating electrode

hemeidan

Abbar

2019

QJES

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“…Mass and heat transfer are the basis of most industrial processes, and there are no processes in the petrochemical, petroleum, or fertilizer industries without heat exchangers or physical separation equipment and/or liquid-solid diffusion-controlled chemical reactions [1,2]. Enhancing techniques can be divided into two main categories, namely active and passive techniques.…”

Section: Introductionmentioning

confidence: 99%

Solid‐Liquid Mass Transfer of an Array of Separated Parallel Corrugated Plates

et al. 2022

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A vertical array of corrugated copper plates was tested for its ability to conduct diffusion‐controlled liquid‐solid reactions. The mass transfer coefficient was investigated in terms of solution velocity, physical parameters of the solution, equivalent diameter of the channel, and array height. It was found that the mass transfer coefficient increases with increasing solution velocity and channel equivalent diameter while decreasing with increasing array height. Compared with flow through flat plates under the same conditions, flow across corrugated‐plate channels enhanced the mass transfer rate by a factor of 2–2.72. Dimensionless analysis was used to correlate the mass transfer data. The present work finds wide practical applications in enhancing mass transfer in many processes, such as membrane separation processes, electrochemical processes, heterogeneous liquid‐solid catalytic and photocatalytic reactions, and biochemical reactors in which enzymes or microorganisms are immobilized on such corrugated surfaces.

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“…This kind of electrochemical reactor has characteristics not engaged by other reactors for instance the possibility of operating at continuous mode and a simple operable compact design [26;25]. Tubular packed bed of woven screens cylinder electrode is one of the packed bed rotating cylinders that didn't used before as a packed bed rotating cylinder electrode for heavy metals removal [27]. In this configuration, the cathode was constructed from a number of coaxial closely packed layers of vertical screen cylinders.…”

Section: Introductionmentioning

confidence: 99%

“…In this configuration, the cathode was constructed from a number of coaxial closely packed layers of vertical screen cylinders. This type of rotating cylinder electrode has high turbulence-promoting action due to its woven structure which has high surface area per unit volume [27].…”

Section: Introductionmentioning

confidence: 99%

Practical study on the electrochemical simultaneous removal of copper and cadmium from simulated wastewater using rotating tubular packed bed cathode

2019

MJET

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The simultaneous removal of copper and cadmium from a simulated wastewater using rotating tubular packed bed of woven screens electrode was investigated. The effect of weight present of each metal on the removal efficiency and current efficiency was studied. The experiments were carried out at current 1.5 A, rotation speed 450 rpm, pH=2, and total concentration of metals (300 ppm) at different weight percent of each metal. The results showed that the removal efficiency of copper increased from 93.5 % to 99.33% as its weight percent increased from 20% to100%. In a similar fashion, the removal efficiency of cadmium increased from 80% to 90% as its weight percent increased from 20% to100 %. The results confirmed that the removal efficiency of any metals decreased in the presence of other metal. The results established that current efficiency for the simultaneous removal of copper and cadmium decreased with increasing of electrolysis time and Cd percent weight or decreasing of Cu weight percent. Current efficiency is higher at the initial stage of electrolysis and then declined with increasing time for all weight percent of metals.

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Mass transfer at a rotating tubular packed bed of woven screens in relation to electrochemical and catalytic reactor design

Cited by 10 publications

References 39 publications

Electrochemical removal of copper from a simulated wastewater using a rotating tubular packed bed of woven screens electrode Removal of heavy metals using packed bed rotating electrode

Electrochemical removal of copper from a simulated wastewater using a rotating tubular packed bed of woven screens electrode Removal of heavy metals using packed bed rotating electrode

Solid‐Liquid Mass Transfer of an Array of Separated Parallel Corrugated Plates

Practical study on the electrochemical simultaneous removal of copper and cadmium from simulated wastewater using rotating tubular packed bed cathode

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