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[en] Hydrogen demand is already strong. It should significantly increase in the next few years due to the refinery industry's growing needs and new applications such as synthetic fuel or biofuel production. To meet the demand advanced processes are being developed throughout the world in a sustainability context. Among the most studied ones are thermochemical cycles: the sulphur-iodine and hybrid-sulphur cycles. For each of these processes, a thorough study was carried out from the flowsheet development to the final hydrogen production cost assessment, through the sizing and costing of the equipment, providing some insights about the process economic competitiveness given the current state of knowledge. This paper presents the analysis conducted for the hybrid-sulphur cycle, which leads to a hydrogen production cost around 6. 6 Euros/kg. The main contributions to that cost are discussed. (authors)
[en] Current Progress and Plan of Nuclear Hydrogen Key Technologies Development Project were introduced ·Design and Safety ·Materials and Components ·Fuel Technologies ·Sulfur lodine Hydrogen Production ·H2 System Interfaces, Nuclear Hydrogen, a Practical Success Path to Hydrogen Economy against Climate Changes and Fossil Fuel Exhaustion ·Satisfies Pre requisites to the Hydrogen Economy ·Effective Use of Land for Massive Production of Hydrogen
[en] The european company of hydrogen technologies CETH is a french start up which develops water electrolyzer of little and medium power for an hydrogen production capacity between 100 and 1000 Nl per hour. The authors presents the researches activities of this enterprise, the principle of the technology applied to the water electrolysis and the electrochemical performances that can be obtained. (A.L.B.)
[en] This book explains electric theory which is divided into four chapters. The first chapter includes electricity and material, electric field, capacitance, magnetic field and electromagnetic force, inductance. The second chapter mentions electronic circuit analysis, electric resistance,heating and power, chemical activity on current and battery with electrolysis. The third chapter deals with an alternating current circuit about the basics of an AC circuit, operating of resistance, inductance and capacitance, series circuit and parallel circuit of PLC, an alternating current circuit, Three-phase Alternating current, two terminal pair network and voltage and current of non-linearity circuit. The last explains transient phenomena of RC series circuit, RL series circuit, transient phenomena of an alternating current circuit and transient phenomena of RLC series circuit.
[en] Microelectrode steady-state voltammetry is used to monitor on-line the progress of preparative electrolyses. This allows to follow educt and product concentrations as a function of the advance of the electrolysis, end-point detection, calculation of the number of electrons transferred per molecule, and determination of diffusion coefficient ratios for redox couples. The technique is demonstrated by numerical simulation, experiments with mixtures of redox partners, electrolyses in macrocells, and miniaturized electrolyses in vials or the wells of microtiter plates
[en] This report provides documentation of the initial startup and testing of the first electrolysis module in the Idaho National Laboratory (INL) High Temperature Steam Electrolysis Integrated Laboratory Scale (ILS) facility. Initial shakedown testing of the INL ILS experimental facility commenced on August 22, 2007. This fulfilled a DOE Level 2 milestone. Heatup of the first ILS module started at approximately 4:10 PM on September 24, 2007. Initial module testing continued for 420 hours. The test average H2 production rate was approximately 1.3 Nm3/hr (0.116 kg H2/hr), with a peak measured value of over 2 Nm3/hr (0.179 kg H2/hr). Significant module performance degradation was observed over the first 250 hours, after which no further degradation was noted for the remainder of the test. Once all test objectives had been successfully met, the test was terminated in a controlled fashion. Discussion is included concerning several modifications that will be incorporated into the facility components to improve reliability and ease of operation for future long term testing
[en] In this paper, electrocoagulation has been used for removal of color from solution containing C. I. Basic Yellow 28. The effect of operational parameters such as current density, initial pH of the solution, time of electrolysis, initial dye concentration, distance between the electrodes, retention time and solution conductivity were studied in an attempt to reach higher removal efficiency. Our results showed that the increase of current density up to 80 A m-2 enhanced the color removal efficiency, the electrolysis time was 7 min and the range of pH was determined 5-8. It was found that for achieving a high color removal percent, the conductivity of the solution and the initial concentration of dye should be 10 mS cm-1 and 50 mg l-1, respectively. An artificial neural networks (ANN) model was developed to predict the performance of decolorization efficiency by EC process based on experimental data obtained in a laboratory batch reactor. A comparison between the predicted results of the designed ANN model and experimental data was also conducted. The model can describe the color removal percent under different conditions
[en] Data on the use of electrochemically induced chain reactions in organic synthesis are considered systematically and generalized. These processes are of particular practical interest in view of the energy saving. Examples are given of the use of electrochemically induced chain reactions for the synthesis of different classes of organic compounds under electrolysis conditions. The bibliography includes 123 references.
[en] The system of automatic control of electrolysis process 'Aluminium-3' was elaborated. The functions of the system were described. The control mode and functions of electrolysis operator were discussed. The functions of anode operator were discussed as well.