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The electrode reactions and electrolysis process of graphite anode were investigated in LiF-NaF-KF (FLiNaK, 46.5-11.5-42.0mol%) eutectic with YF3 at 823K. Two different types of reactions were observed on graphite anode. The graphite was oxidized to carbon mono- and dioxide in a potential range of 0–2V (vs. Ni2+/Ni, similarly hereinafter), and carbon fluorides were generated when the potential fell...
Carbon thin films were deposited on Aluminium(Al), Copper(Cu) and Silicon(Si) substrates by electrolysis of methanol. The effect of camphor (C10H16O) a natural source, incorporation with methanol is investigated. Camphor with varying amount was mixed in methanol solvent to prepare the electrolytes. Al, Cu and Si substrates were mounted on the negative electrode. Remarkable change in the variation...
This paper presents an analytic way of sizing an electrolyser by considering the load requirements and efficiencies of the electrolyser, fuel cell and their ancillaries. Current density and the size of the active area of the membrane are optimised to ensure thermal self-sustaining mode of the electrolyser for stand-alone applications. This eliminates the need of heating the feed water. Correlations...
A new method for Nitrate-N removal in water has been presented in this paper, and related experiments have been carried out to study its technical characteristics. Results showed that in designed electrolysis system, Fe modified Ti substrate cathode can catalytic reduce NO3--N to NH4+-N under suitable conditions. Furthermore NH4+-N can be oxidized to N2-N in same system by supporting of Cl-. Under...
China has abundant wind energy resources. The total installed capacity of wind power has doubled every year in the past five consecutive years. By the end of 2009, the total installed capacity of wind power reached 26000 MW. However, there are over 9880 MW wind turbines that are not connected to the grid because of peak shaving restraint. Hydrogen has been recognized as the most promising future energy...
The distribution of the electricity and the thermal field directly affects the stability, current efficiency and energy consumption of electrolysis cells. In this paper, by using finite element software ANSYS, the thermoelectric field of 2000 A heat recovery aluminum reduction cell model was built. Through the use of APDL, a parametric model was established and then the thermoelectric field was simulated...
The performance of electro coagulation, with thirty-one aluminum electrodes coated with a layer of graphite, in the treatment of metal ions (Cu2+, Zn2+ and Cr6+) containing wastewater, had been investigated. The basic principle of electrolysis and several working parameters, such as pH, operating time and connection mode were deeply analyzed. The results show that monopolar connection is the most...
This paper presents a novel approach to maximize the current density of electrodes modified by carbon nanotubes for high efficiency hydrogen production. Multiwalled carbon nanotubes (MWNTs), due to their unique electrical conductivity and mechanical properties, have led to our interest in their application of MWNTs for water splitting purposes. The motivation for this work is to provide a platform...
A novel electrode for water electrolysis based on the graphite attached with vertical aligned carbon nanotubes is presented. This carbon nanotubes based electrode, synthesized directly by PECVD, provides a 6 times enhancement of water splitting current density and efficiency compared to the graphite electrode in acidic electrolyte due to its multiplied surface area and higher catalytic activity. In...
The electrochemical oxidation of atrazine on Ti/SnO2-Sb2O5/PbO2 electrode was studied by cyclic voltammetry in this paper. The electrochemical behaviour of the electrode in sodium sulfate solution and in the mixture solution of sodium sulfate and atrazine has been studied. The experimental results of cyclic voltammetry showed that acidic media was suitable for efficient electrochemical oxidation of...
Different metal (Bi, Ni, La, Ce and Er) doped PbO2 electrodes were successfully prepared by electro-deposition method, and their electrocatalytic degradation capacity for 2, 4-dichlorphenol (2, 4-DCP) in water was compared in a batch experiment. The electrodes were characterized by scanning electron microscope (SEM). The morphology and component analysis showed that metal (Bi, Ni, La, Ce and Er) was...
This paper suggests a technological process to oxidize stench sulfide wastewater containing dodecyl mercaptan with electrolyzing NaOH in the presence of active carbon. Preliminary experiments were conducted and good results were obtained. Under the condition that electrolyzing 1% NaOH with 3A current and the reaction temperature remains 20°C and the reaction time lasts 10~30 s, the stench dodecyl...
In order to evaluate the electrolytic decomposition process of ammonia, the effects of current density and chloride ion were investigated. The Ti/RuO2- Pt electrode was used as the anode, and Ti electrode as the cathode. The current densities, of 5mA/cm2, 10mA/cm2, and 15mA/cm2, were applied during electrolysis. It was indicated that the ammonia-nitrogen removal efficiency increased with the current...
Ni-P alloy has been shown to be a potential electrode material for hydrogen production from electrolysis. The enhancement of its electrocatalytic efficiency with micro-patterned structures fabricated using microelectromechanical system (MEMS) process was investigated in this study. The cylindrical columns with diameter of 65μm and spacing of 105μm were fabricated in rectangular array and two different...
This paper suggests a technological process to oxidize stench sulfide wastewater containing dodecyl mercaptan with electrolyzing Na2SO4 in the presence of active carbon. Preliminary experiments were conducted and good results were obtained. Under the condition that electrolyzing 1%(m/V)Na2SO4 with 1A current and the reaction temperature remains 30 and the reaction time lasts 10 ~ 30 s, the stench...
In order to adapt the characteristics of wind power, we investigated the anode process with high current density. A liquid fluctuation testing system of aluminum electrolysis was designed. It was used to test the electrolyte liquid fluctuation conditions in the electrolysis course with differently shaped anodes and different current densities; the effect of electrolyte fluctuation frequency and extent...
This paper suggests a technological process to oxidize stench sulfide wastewater containing dodecyl mercaptan with electrolyzing NaCl in the presence of active carbon. Preliminary experiments were conducted and good results were obtained. Under the condition that electrolyzing 30 g/L NaCl with certain current and the reaction temperature remains 20degC and the reaction time lasts 10~30 s, the stench...
In this paper, an industrial-scale alkaline process for the production of Zn powder using brass smelting ash as raw material was presented. It was suggested that the brass smelting ash be leached with 230 g/L NaOH solution at 80degC for 90 min at a phase ratio of 15. The maximum extraction of Zn and Pb can be reached at 96-99% and 90-95%, respectively. After Pb was separated selectively and quantitatively...
The influence of the current density (i) and the duration of electrolysis on the current efficiency of barium (CEBa) in the alloy with zinc and cadmium has been investigated during the electrolysis of melts (K-Na)Cleq-26 mol % BaCl2 containing up to 0.4 mol % BaO dissolved at T = 973 K. It is determined that the dependence of CEBa on the current density passes through a maximum: at i = 0.18 A/cm2,...
Polypyrrole(PPy) nanowires modified electrodes were developed by template-free electrochemical method based on graphite electrode. The Ag/PPy nanowires composited modofied electrodes were prepared by method of electrochemical deposition Ag with the condition of constant current density. The electrocatalytic reduction of nitrite based on Ag/PPy nanowires composited modified electrodes was developed...
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