Wyniki wyszukiwania - BazTech

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Modification of Electro-Fenton Process with Granular Activated Carbon for Phenol Degradation – Optimization by Response Surface Methodology

Thwaini Hind H., Salman Rasha H.

Journal of Ecological Engineering

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2023

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Vol. 24, nr 9

92--104

EN

As a result of rapid industrialization and population development, toxic chemicals have been introduced into water systems in recent decades. Because of its excellent efficiency and simple design, the three-dimensional (3D) electro-Fenton method has been used for the treatment of wastewater. The goal of the current study is to explore the efficiency of phenol removal by the 3D electro-Fenton process, which is one of the advanced oxidation processes (AOPs). In the present work, the effect of the addition of granular activated carbon (GAC) particles to the electro-Fenton system as the third electrode would be investigated in the presence of graphite as the anode and nickel foam as the cathode, which is the source of electro-generated hydrogen peroxide (H2O2). The influence of operation parameters (current density, electrolysis time, and GAC) on catalytic performance will be studied, which will be adjusted by the response surface methodology (RSM). The pH was adjusted to 3, and the airflow was set to 10 L/h. According to the results the nickel foam was an excellent cathode material choice. The best conditions for phenol elimination were at current density of 3.56 mA/cm2, FeSO4.7H2O dosage of 0.1 mM, GAC of 30 g, and a time of 3 h to attain the removal rates of phenol and chemical oxygen demand (COD) of 98.79% and 93.01%, respectively. The results showed that time had a higher effect on the phenol and COD removal efficiency, while the impact of current density was lower. The model equation’s high R2 value (97.90%) demonstrates its suitability.

2

Ethanol oxidation reaction at Pd-modified nickel foam obtained by PVD method

Mikołajczyk T., Turemko M., Pierożyński B.

Polish Journal of Chemical Technology

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2015

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Vol. 17, nr 2

47--50

EN

In this study, palladium-modified nickel foam substrate was applied to examine ethanol oxidation reaction (EOR) in 0.1 M NaOH supporting solution. An EOR catalyst was prepared by physical vapour deposition (PVD) of palladium onto Ni foam material. Temperature-dependent kinetics of the EOR were studied over the temperature range: 20-60°C by means of a.c. impedance spectroscopy and cyclic voltammetry techniques. Deposition of a noble metal additive was clearly exposed through scanning electron microscopy: SEM/EDX-supported analysis. Most importantly, this work investigated the effect of pre-deposited fullerene on nickel foam, on the catalytic (EOR) properties of such-produced Ni foam/Pd composite material.

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Charakterystyka elektryczna ogniwa niklowo-wodorkowego (Ni/MH) typu KSL

Jankowska E., Turowski T.

Przegląd Elektrotechniczny

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2005

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R. 81, nr 7-8

73-75

PL

W pracy przedstawiono wyniki badań elektrycznych ogniw Ni-MH z nowoopracowanymi elektrodami pastowanymi. Przebadano wykonane w CLAiO pryzmatyczne ogniwa niklowo-wodorkowe o pojemności nominalnej 2,9 Ah/ogniwo, z zastosowaniem nowoczesnych nośników elektrod dodatnich i ujemnych - pianki niklowej oraz badano wpływ dodatków masy czynnej na właściwości elektryczne ogniwa. Badania wykazały, że modyfikacja elektrody niklowej wpływa na parametry pracy ogniwa. Istnieje możliwość opracowania elektrod niklowych o większej pojemności lub umożliwiającej zastosowanie wyższych prądów rozładowania.

EN

In this paper electrical characteristics of nickel- metal hydride cells with new pasted electrodes were investigated. The prismatic nickel-metal hydride cells with nominal capacity 2,9 Ah and application nickel foam as new carrier of positive and negative electrodes have been studied. These Ni-MH cells have been constructed in CLAIO. The effects of additions positive mass on working cell parameters were described. These studies showed that modification of nickel positive electrode has influenced on working parameters of cell. There is a possibility of constructing nickel positive electrodes having greater capacity and enabling higher discharge rates.

4

Modification of paste-type nickel cathodes for application in alkaline cells

Młynarek G., Ważny A., Turowski T., Skowroński J.M., Czerwiński A.

Polish Journal of Chemical Technology

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2004

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Vol. 6, nr 2

35-38

EN

The studies were focused on paste-type nickel cathodes produced with foam nickel as a carrier. The influence of the following additives on the electrochemical behavior of the paste-type cathodes was analyzed: cobalt powder, cobalt oxide, barium hydroxide and calcium hydroxide.