A metal hydride reactor including at least one sealed chamber, the chamber being divided into two compartments by a partitioning wall made of a material permeable to hydrogen gas but impermeable to metal hydrides, the compartments containing different metal hydrides. In one embodiment, the metal hydride reactor including a sealed vessel rotatable about a central shaft, the vessel being divided into a plurality of sealed chambers by at least one sealing wall along a plane containing the central shaft and extending diametrically thereof, each of the sealed chambers being divided into two compartments by a partitioning wall made of a material permeable to hydrogen gas but impermeable to metal hydrides, the compartments containing different metal hydrides, and each of the compartments having a heat conducting surface facing exteriorly thereof.

Metal hydride reactor

A hydrogen storage tank has an outer cylinder and a cylindrical hydrogen storage module within the outer cylinder spaced apart from an inner peripheral surface of the outer cylinder to provide a hydrogen passage therebetween. The cylindrical hydrogen storage module includes a lamination having a plurality of hydrogen storage units filled with powdery hydrogen absorption material and a hydrogen absorption and desorption surface on an entire outer peripheral surface, while interposing a heating/cooling element between ones of adjacent units. First and second main passages penetrate the lamination in a lamination direction of the units, and permit heating fluid and cooling fluid to flow therethrough. Sub passages branch from the main passages and extend over within each of the heating/cooling elements.

Hydrogen storage tank

A man portable hydrogen source, the source comprising one or more hydrogen generating elements (2), an ignition control system (3) and a pressure vessel (1). Each hydrogen generating element comprises a pellet holder (7) provided with one or more recesses and a thermal insulation layer (9) to reduce heat transfer to adjacent hydrogen generating elements; wherein at least one recess contains a pellet (8) of a chemical mixture which on thermal decomposition evolves hydrogen gas; wherein the ignition control system comprises one or more ignitors (14), associated with an individual pellet (8), and activation means to activate the ignitors; and wherein the evolved hydrogen and hydrogen generating elements are contained within the pressure vessel.

Portable Hydrogen Source

Disordered Multicomponent hydrogen storage material characterized by extraordinarily high storage capacity due to a high density of useable hydrogen storage sites (greater than 1023 defect sites/cc) and/or an extremely small crystallite size, as shown on the graph in the figure. The hydrogen storage material can be employed for electrochemical, fuel cell and gas phase applications. The material may be selected from either of the modified LaNi?5? or modified TiNi families formulated to have a crystallite size of less than 200 Angstroms and most preferably less than 100 Angstroms.

Hydrogen storage materials having a high density of non-conventional useable hydrogen storing sites

Four groups of advanced hydrogen hydride storage and hydride electrode materials, consisting of two common elements, titanium and nickel. In the first group of materials, zirconium and chromium are added with the common elements. The second group of materials contain three additional elements in addition to the common elements, namely, chromium, zirconium and vanadium. The third group of materials contain also, in addition to the common elements, zirconium and vanadium. The fourth group of materials adds manganese and vanadium with the common elements. The preparation methods of the materials, as well as their hydride electrode are disclosed. Electrochemical studies indicate that these materials have high capacity, long cycle life and high rate capability.

Hydrogen storage hydride electrode materials

A device for the storage of hydrogen, comprising a container, two porous plates opposed parallelly to each other across a fixed distance and fastened to the inner wall of the container, heating/cooling members disposed one each outside the porous plates and separated by a fixed distance from the corresponding porous plates, and an alloy capable of storing hydrogen placed in the spaces formed between the porous plates and the heating/cooling members

Device for storage of hydrogen

PURPOSE:Aluminum is substituted for a portion of nickel in a mischmtalnickel alloy to provide a polyalloy that is capable of occlusing a sufficient amount of hydrogen and releasing it at a moderate condition so as to be useful as an inexpensive, highly practical, stationary alloy for hydrogen storage. CONSTITUTION:A mischmetal base polyalloy having a general formula MmNi5- xAlx (where Mm represents a mischmetal and x is 0.01 to 1) consisting of 93% of a mixture of light rate earth metals, 5% of iron and 2% of magnesium, silicon and others, is used as an alloy for hydrogen storage. Such hydrogen storage alloy is advantageously used in the form of powder to be filled in a proper container and activated by a compressed hydrogen of 50kg/cm or greater, at room temperature. The activated alloy, when impressed by a hydrogen pressure more than dissociation equilibrium pressure of hydride between-30 deg.C and room temperature , forms into a metal hydride, which efficiently releases hydrogen when heated above room temperature of exposet to a reduced pressure.

Mmni55xalx base metal alloy for hydrogen storage

PURPOSE:To provide a titled alloy which can occlude a large atm of hydrogen in the form of metallic hydride, releases easily and quickly hydrogen with slight heating and has extremely small hysteresis by consisting the same of specifically composed three elements of rare earth metal, Ni and Al CONSTITUTION:A ternary alloy of rare earth element for occluding hydrogen is expressed by the following general formula RxNiyMtz (wherein R; rare earth metal atom, Mt; metal atom selected from Al, Mn, Cu, Fe, Cr, Co, Si, V, Mg, Sn, Mo, Ti, Zr, Zn, x; positive number of 10-20, y; positive number of 30- 90, z; positive number of 001-10, y+z/x>5 or y+z/x<5) Said alloy can be easily produced by mixing the above-mentioned ratios of the three metallic elements, charging the mixture in an arc melting furnace, etc, heating the mixture to melt in an inert atmosphere and allowing the heated mixture to cool The resulted alloy for accluding hydrogen is subjected to annealing for about 8-25hr at 800-1,100 degC and is used in the form of powder in order to obtain an increased surface area

Ternary alloy of rare earth element for occluding hydrogen

PURPOSE:To provide a hydrogen occluding four-element alloy extremely easily activated by hydrogen and capable of occluding hydrogen at an extremely high speed in a hydride form, comprising Ti, Cr, Mn and either one kind or more Al, Si, Zn and Misch metal. CONSTITUTION:The titled hydrogen occluding four-element alloy is shown by the formula and can be prepared by a known method but, most pref., by an arc melting method. That is, it can be easily prepared by a method wherein each element of Ti, Cr, Mn and Al are weighed and mixed to be formed into an optional shape by compression molding and the molded mixture is charged into an arc melting furnace to be heated and melted in an inert atmosphere. Thus obtained hydrogen occluding alloy is pref. used in a powder form in order to enlarge the surface area thereof to increase hydrogen occluding capacity thereof. This alloy has not only the aforementioned characteristics but is extremely low in the hysteresis, namely, the difference of hydrogen occluding and releasing pressure, and releases hydrogen easily and rapidly by slight heating.

Hydrogen occluding alloy

A Mischmetal alloy of the general formula: MmNi5-x Crx-y Ay, wherein Mm stands for Mischmetal and A for Al, Co, Cu, Fe, Mn or Si, is highly useful as an alloy for the storage of hydrogen by occlusion.

Oosumi Yasuaki

Papers

Device for storage of hydrogen

Mmni55xalx base metal alloy for hydrogen storage

Ternary alloy of rare earth element for occluding hydrogen

Hydrogen occluding alloy

Mischmetal alloy for storage of hydrogen