Effect of electrode pulsation on the rate of simultaneous electrochemical recovery of copper and regeneration of ferric salts from dilute solutions

El-Gayar, Dina Ahmed; El-Shazly, A.H.; El-Taweel, Y.A.; Sedahmed, G.H.

doi:10.1016/j.cej.2010.06.027

Cited by 11 publications

(7 citation statements)

References 26 publications

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“…Using batch recycle smooth rotating cylinder reactor Robinson and Walsh [49] obtained a value of 8.3 kWÁh/kg for the deposition of copper on smooth rotating cylinder from dilute solution (0.5 g/L). The present EÁEÁC as well as the value reported by Robinson and Walsh are higher than the value 2 kWÁh/kg usually reported for the electrowinning of copper from high CuSO 4 concentration (20-60 g/L) [49,50], the relatively high EÁEÁC obtained in case of dilute waste water solutions is attributed to the low current efficiency of copper deposition and the increased cell resistance offered by the H 2 bubble layer on the cathode surface [48], electrowinning of copper from high CuSO 4 concentration at a sub-limiting current density where the current efficiency is high Fig. 10.…”

Section: Performance Of the Present Reactor In Removing Heavy Metals contrasting

confidence: 60%

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

Abdel‐Aziz

Nirdosh

Sedahmed

2015

International Journal of Heat and Mass Transfer

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Section: Performance Of the Present Reactor In Removing Heavy Metals contrasting

confidence: 60%

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

Abdel‐Aziz

Nirdosh

Sedahmed

2015

International Journal of Heat and Mass Transfer

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“…The present relatively low energy consumption may be attributed to the high degree of mass transfer enhancement, which increases the current efficiency of copper deposition from dilute solution beside the fact that stack oscillation assists in the early release of H 2 bubbles from the cathode surface. This effect tends to reduce the total cell voltage due to the decrease in the cell resistance caused by the presence of H 2 bubbles at the cathode surface . Electrical energy consumption in kW·h/kg (EC) was calculated from the equation EC = italicI × italicE 1000 × italicm …”

Section: Resultsmentioning

confidence: 99%

“…Table 6 shows that within the present range of conditions electrical energy consumed in copper removal using insoluble lead anode is less than the value 2 kW•h/kg reported in the literature. 23 The present relatively low energy consumption may be attributed to the high degree of mass transfer enhancement, which increases the current efficiency of copper deposition from dilute solution a Electrode height = 5 cm; electrode width = 5 cm. beside the fact that stack oscillation assists in the early release of H 2 bubbles from the cathode surface.…”

Section: Mass Transfer Study By Measuring the Limitingmentioning

confidence: 99%

“…This effect tends to reduce the total cell voltage due to the decrease in the cell resistance caused by the presence of H 2 bubbles at the cathode surface. 23 Electrical energy consumption in kW•h/kg (EC) was calculated from the equation…”

Section: Mass Transfer Study By Measuring the Limitingmentioning

confidence: 99%

“…The mass transfer behavior of oscillating vertical single screen and a stack of closely packed screens was studied by (i) measuring the limiting current of copper deposition from acidified CuSO 4 using a cell with a soluble copper anode and (ii) measuring the Cu 2+ concentration versus electrolysis time using a constant current electrolysis in a cell with insoluble lead anode. The use of oscillation and pulsation to enhance the rate of heat and mass transfer in chemical engineering equipments has been receiving a growing interest in view of its merits compared to other intensification techniques. − …”

Section: Introductionmentioning

confidence: 99%

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Mass Transfer at a Vertical Oscillating Screen Stack in Relation to Catalytic and Electrochemical Reactor Design

Abdel‐Aziz

Nirdosh

Sedahmed

2012

Ind. Eng. Chem. Res.

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The aim of the present work is to improve the performance of the parallel plate catalytic and electrochemical reactor in conducting diffusion controlled reactions by using parallel oscillating vertical arrays of closely packed screens. To this end, rates of mass transfer at oscillating vertical single screen and arrays of closely packed screens were studied by measuring the limiting current of the cathodic deposition of copper from acidified copper sulfate. Variables studied were amplitude and frequency of vibration, screen mesh number, and number of screens per stack. The mass transfer data at a single vibrating screen were correlated by the equation: Sh = 0.73Sc0.33Rev 0.38. Increasing mesh number of the screen was found to increase the mass transfer coefficient, while increasing the number of screens per stack decreased the mass transfer coefficient below single screen value. The enhancement ratio between oscillating screen array and oscillating vertical plate (the volumetric mass transfer coefficient ratio) ranged from 11.7 to 27.87 depending on the operating conditions. Electrical energy consumption of the present reactor was found to be lower than the value reported in the literature for electrowinning of copper using traditional parallel plate reactor. In view of this, the possibility of using oscillating vertical screen stack in building high space-time yield modular parallel plate electrochemical reactor suitable for wastewater treatment, electroorganic synthesis, and electrochemical energy storage via redox cells was noted. Also, the possibility of using the present geometry in building catalytic reactors suitable for conducting diffusion controlled liquid–solid reaction was highlighted.

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Material Design Strategies for Recovery of Critical Resources from Water

et al. 2023

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Population growth, urbanization, and decarbonization efforts are collectively straining the supply of limited resources that are necessary to produce batteries, electronics, chemicals, fertilizers, and other important products. Securing the supply chains of these critical resources via the development of separation technologies for their recovery represents a major global challenge to ensure stability and security. Surface water, groundwater, and wastewater are emerging as potential new sources to bolster these supply chains. Recently, a variety of material‐based technologies have been developed and employed for separations and resource recovery in water. Judicious selection and design of these materials to tune their properties for targeting specific solutes is central to realizing the potential of water as a source for critical resources. Here, the materials that are developed for membranes, sorbents, catalysts, electrodes, and interfacial solar steam generators that demonstrate promise for applications in critical resource recovery are reviewed. In addition, a critical perspective is offered on the grand challenges and key research directions that need to be addressed to improve their practical viability.

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Effect of electrode pulsation on the rate of simultaneous electrochemical recovery of copper and regeneration of ferric salts from dilute solutions

Cited by 11 publications

References 26 publications

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

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

Mass Transfer at a Vertical Oscillating Screen Stack in Relation to Catalytic and Electrochemical Reactor Design

Material Design Strategies for Recovery of Critical Resources from Water

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