A non-pyrophoric AB.sub.2-type Laves phase hydrogen storage alloy and hydrogen storage systems using the alloy. The alloy has an A-site to B-site elemental ratio of no more than about 0.5. The alloy has an alloy composition including about (in at %): Zr: 2.0-5.5, Ti: 27-31.3, V: 8.3-9.9, Cr: 20.6-30.5, Mn: 25.4-33.0, Fe: 1.0-5.9, Al: 0.1-0.4, and/or Ni: 0.0-4.0. The hydrogen storage system has one or more hydrogen storage alloy containment vessels with the alloy disposed therein.

The invention relates to a tank for storing hydrogen by absorption into a hydrogen-storage material. The tank contains a chamber, a hydrogen feed inlet, a hydrogen discharge outlet, and an inner structure for storing the hydrogen-storage material. The inner structure contains a stack along a longitudinal axis of at least two levels for containing the storage material. Each level includes a distributor cup, a receiver cup for the storage material, and a collector cup. The distributor cups, receiver cups and collector cups are stacked one on top of the other and rigidly and sealingly connected to one another. The invention also relates to a distribution pipe distributing in parallel hydrogen in the distributor cups such that, for each level, hydrogen flows from each distributor cup to the collector cup by passing through the storage material.

A system for distribution of hydrogen gas in a metal hydride reactor is disclosed. The system comprises a hydrogen distribution conduit positioned within a metal tube so as to define an annular space between the hydrogen distribution conduit and the outer metal tube. The hydrogen distribution conduit provides a flow passage for the hydrogen gas. A metal sponge matrix containing hydrogen-storing metal powder or hydrogen-storing alloy powder is filled in the annular space. The system provides a more uniform distribution of hydrogen across the particles of the hydrogen-storing metal/alloy powder, provides mechanical support to the hydrogen distribution conduit, improves the thermal conductivity of the powdered metal/alloy bed and reduces the size and production cost of the reactor.

A heat generating device includes: a sealed container; a tubular body provided in a hollow portion of the sealed container; a heat generating element provided on an outer surface of the tubular body and configured to generate heat by occluding and discharging hydrogen supplied to the hollow portion; and a flow path formed by an inner surface of the tubular body and through which configured to allow a fluid that exchanges heat with the heat generating element to flow. The heat generating element includes a base made of a hydrogen storage metal, and a multilayer film provided on the base. The multilayer film has a first layer made of a hydrogen storage metal and having a thickness of less than 1000 nm, and a second layer made of a hydrogen storage metal, which is different from that of the first layer, and having a thickness of less than 1000 nm.

A heat exchanger incorporates a metal hydride heat exchanger and mitigates the fluid mixing process, and thus greatly improves the heat transfer efficiency and heat recovery processes. The metal hydride heat exchanger has a container for the metal hydride that has a large aspect ratio. A plurality of high aspect container for the metal hydride may be coupled with a manifold.

A hydrogen storage device 200 comprises: a first vessel 230, having a first fluid inlet 210 and/or a first fluid outlet 220, having therein a thermally conducting network 240 thermally coupled to a first heater (not shown); wherein the first vessel 230 is arranged to receive therein a hydrogen storage material in thermal contact, at least in part, with the thermally conducting network 240; wherein the thermally conducting network 240 has a lattice geometry, a gyroidal geometry and/or a fractal geometry in two and/or three dimensions, comprising a plurality of nodes, having thermally conducting arms therebetween, with voids between the arms; and wherein the hydrogen storage material comprises and/or is a liquid organic hydrogen carrier, LOHC.

A method for storing hydrogen gas includes the process steps pre-heating of an at least partially dehydrogenated hydrogen carrier material, storing the hydrogen gas in chemically bound form on the hydrogen carrier material as well as cooling and conditioning of the at least partially hydrogenated hydrogen carrier material.

A system for storing solid state hydrogen includes: a solid state hydrogen storage pellet including a magnetic material and storing solid state hydrogen therein; an inner container surrounding the solid state hydrogen storage pellet; and a coil surrounding the inner container, wherein when current is supplied to the coil, the current reacts with the magnetic material included in the solid state hydrogen storage pellet to form an induction magnetic field, thereby heating the solid state hydrogen storage pellet.

It is an object of the present invention to provide a storage material for a gas such as hydrogen, carbon dioxide, methane, or acetylene (excluding nitrogen gas) comprising a metal-organic framework comprising a hydroxamic acid group as a bonding site. A metal-organic framework comprising a multivalent metal ion and a molecule comprising an unsubstituted or substituted hydroxamic acid group and one or more sites capable of being bonded to the multivalent metal ion is contained. The molecule is preferably at least one compound selected from the group consisting of compounds of formulas (I) to (III).

##STR00001##

Described are storage and dispensing systems, and related methods, for storing and selectively dispensing high purity reagent gas from a storage vessel in which the reagent gas is held in sorptive relationship to pyrolyzed carbon adsorption particles.