Showing papers in "International Journal of Hydrogen Energy in 1988"

TL;DR: In this paper, the production of hydrogen by defined and undefined bacterial cultures was studied, using pure sugars (glucose and maltose) or natural sources rich in either pure sugars or polysaccharides.

TL;DR: Ammonia (NH 3 ) is a non-polluting fuel which produces only water and nitrogen as products of combustion as mentioned in this paper, and it could be an alternative to hydrogen for vehicle motive power in the hydrogen economy.

TL;DR: In this article, solid oxide electrolyte cells have been developed for hydrogen production from water vapour with high overall efficiency on the basis of experimental data plant concepts have been designed for autothermal electrolysis operation with low temperature (∼150°C) steam input at a mean cell voltage of ∼13 V.

TL;DR: Experimental observations of, and theoretical models for, hysteresis in metal-hydrogen systems are reviewed in this article, where the authors show that the magnitude of the hystresis is affected by many different factors including temperature, alloy composition, hydrogen aliquot size, annealing of metal sample, number of absorption/desorption cycles and particle size.

TL;DR: In this paper, the industrial realization of an advanced electrolysis cell for alkaline water electrolysis was gradually achieved and semitechnical cell units were constructed, which work with ceramic diaphragms and galvanically-deposited Raney nickel electrodes.

TL;DR: In this article, a detailed investigation on the i-E behavior, the stability under open circuit conditions, the tolerance to electrochemical corrosion and the long-term stability was carried out.

TL;DR: In this paper, a ternary combination (Mg-Ni-Cu) for hydrogen storage purposes is proposed, and the kinetic parameters such as activation energies, reaction rates and orders of the reaction for the decomposition of the hydrides formed from Mg, Mg2Ni and Mg 2Cu alloys are evaluated from the DTA data.

TL;DR: In this paper, the incorporation of hydrogen into thin film form discussed in this article is a relatively new field of research and the main advantages of thin film metal hydrides are that these provide large surface area with fast charging discharging rate for hydrogen, pulverization is slower, both critical pressure and critical temperature are significantly lower, better heat transfer arrangements, protective surface coating could be done to stop poisoning by oxygen and activation of thin-film hydride is possible by coating with a layer of catalytic material.

TL;DR: An advanced low hydrogen overvoltage cathode has been developed for use in chlor-alkali electrolysis cells as mentioned in this paper, which is made by composite-coating a novel ternary Raney nickel electrocatalyst on a variety of substrates.

TL;DR: In this paper, energy and exergy analyses of the Imperial Chemical Industries low-pressure process for methanol from natural gas were carried out using a computer code capable of performing process simulation and energy and energy exergy analysis.

TL;DR: In this article, the authors proposed a hybrid system where dye compounds and semiconductor particles act cooperatively in H2 evolution by photochemical transformation that uses solar light is accomplished by photobiological systems, photochemical assemblies and photoelectrochemical cells.

TL;DR: In the case of high-purity hydrogen users in particular, hydride technology offers a real alternative-not only from the technical but also from the economical point of view-to other gas storage and purification processes as mentioned in this paper.

TL;DR: A general curve for optimally adapted configurations of photovoltaic electrolysis plants has been derived and for simplified design calculations only one single average operation point may substitute the complete annual simulation.

TL;DR: In this article, the photo-Kolbe reaction in oxalic acid in the presence of Cu(II) doped WO3 particles, simultaneously generating CO2 and H2, was investigated.

TL;DR: In this paper, the authors present the results of a fleet test of ten vehicles with a total of 160,000 km covered up to now, and the malfunctions which arose in the vehicles and at the filling station were within the acceptable limits of such a test.

TL;DR: In this article, the intrinsic degradation behavior of LaNi5 was investigated by the changes of pressure-composition-temperature (P-C-T) curves and the hydrogen desorption technique after the pressure induced hydrogen absorption-desorption cycling.

TL;DR: In this paper, the authors reviewed the recent results of research and developments in photochemical and photoelectrochemical water decomposition technologies and introduced a new system using a semiconductor photoelectron coupled with thermoelectric generation.

TL;DR: In this article, Mg-10 wt%Ni alloys were prepared and characterized from the point of view of their hydriding and dehydriding properties, and the heat of dissociation of MgH2 was also accurately measured.

TL;DR: In this paper, the effects of coating composition and catalyst particle size on hydrogen evolution were determined, and the results showed that AB 5 -catalysed cathodes showed stable overpotentials during electrolyses of up to 7000 hours, and were not adversely affected by extended open circuit exposure or reverse polarity tests.

TL;DR: A new hydride phase apart from Mg2NiH4 has been identified in the MgNiH2 system by pressure-composition-temperature relationships, thermal analyses and X-ray diffraction measurements.

TL;DR: In this paper, the authors show that certain unexpected effects observed during developments and reductions of pressures of hydrogen gas inside tubular membranes of palladium alloys now seem to be self-consistently interpretable in terms of lattice-strain-induced temporary "uphill" hydrogen diffusion processes.

TL;DR: The cogeneration potential of several types of fuel cell systems (phosphoric acid, alkaline, solid polymer electrolyte, molten carbonate, and solid oxide) was examined using energy and exergy analyses in this article.

TL;DR: In this article, the effect of etching the electrode surface and of the deposition of submonolayer quantities of metal on the semiconductor electrode surface has been examined, and the experimental observations show that the rate of reaction (H2 evolution) is determined by the charge transfer rate across the metal-solution interface.

TL;DR: In this paper, the performance of PTFE-bonded carbon electrodes for gas phase electrolysis of hydrobromic acid (48 wt%) was investigated for the development of the bromine-based thermochemical hydrogen production process.

TL;DR: The combination of water electrolysis and hydrogen-oxygen fuel cells still looks very attractive for space-energy storage applications as discussed by the authors, and a need exists today to develop a small power plant for the propulsion of automobiles and larger stationary power plants within a city, eliminating pollution problems.

TL;DR: In this paper, the rate expression for the reverse Deacon reaction was developed from the experimental data at 879 K. The rate expression was verified by the integral approach and the results were extended to two other temperatures, 777 K and 983 K.

TL;DR: In this article, the authors describe the history, organization, component and vehicle development, as well as the fleet test results of this joint project which has been and is still being sponsored by the Federal Ministry for Research and Technology.

TL;DR: In this paper, a new method is suggested to minimize the boiloff as well as the irregularity in boil-off in cryogenic liquids stored over long periods is a critical problem in large cryogenic tankers.

TL;DR: In this paper, the hydride formation by CoZr and NiZr alloys was investigated by differential scanning calorimetry method and the activation energies of each stage, absorption enthalpy and frequency factor were also determined.

TL;DR: The effect of Eu content on the partial molar of enthalpy and entropy of absorption of mole of hydrogen (ΔHH, ΔSH) and the miscibility gap are discussed in this article.