Disclosed herein is a class of co-ordination framework materials having various useful properties. The co-ordination frameworks comprise complexes of M.sub.2[M(CN).sub.6] or A.sub.x(M.sub.2[M(CN).sub.6]), wherein M is selected from V, Cr, Mn, Fe, Co, Ni, Cu, Ag, Au, Zn, Ru, Rh, Pd and Pt; M is selected from Fe and Ru; A (when present) is located in the pores of the framework and is selected from Li.sup.+, Na.sup.+, K.sup.+, Be.sup.2+, Mg.sup.2+ and Ca.sup.2+; and x (when present) is 0<x8. Also disclosed are methods of making said materials and various uses of said materials.

This disclosure relates to novel metal hydrides, processes for their preparation, and their use in hydrogen storage applications.

A pressure vessel for storing hydrogen is described. The pressure vessel includes at least one chamber to store hydrogen atoms. The pressure vessel also includes a mycelium structure within the at least one chamber. The mycelium structure has a surface area of at least 800 m.sup.2/m.sup.3. At least some of the hydrogen atoms are attached to the mycelium structure at a pressure greater than ambient pressure. Methods of storing hydrogen and methods of constructing a hydrogen storage tank are also described.

The present invention relates to a process for producing and for regenerating siloxane hydrogen carrier compounds.

Apparatuses and methods of measuring a hydrogen diffusivity of a metal structure including during operation of the metal structure, are provided. A hydrogen charging surface is provided at a first location on an external surface of the structure. In addition, a hydrogen oxidation surface is provided at a second location adjacent to the first location on the external surface of the structure. Hydrogen flux is generated and directed into the metal surface at the charging surface. At least a portion of the hydrogen flux generated by the charging surface is diverted back toward the surface. A transient of the diverted hydrogen fluxes measured, and this measurement is used to determine the hydrogen diffusivity of the metal structure in service.

The present disclosure relates to improved processes for the preparation of metal hydrides. The present disclosure also relates to metal hydrides, e.g., metal hydrides prepared by the processes described herein, that exhibit enhanced hydrogen storage capacity when used as hydrogen storage systems.

A solid-gas reaction substance-filled reactor includes a core part in which heat medium heat-transfer tubes and spacers are alternately stacked, a gas introduction/discharge part that communicates with opening ends of the spacers, and a heat medium introduction/discharge part that communicates with heat medium flow paths. Filled bodies including metallic foil bags and a solid-gas reaction substance filled in the bags are inserted into the spacers. At least the filled bodies and the heat medium heat-transfer tubes are brazed to each other. The solid-gas reaction substance-filled reactor is obtained by stacking the filled bodies with the solid-gas reaction substance filled into the metallic bags, the heat medium heat-transfer tubes, and the spacers in a predetermined order and then brazing them.

A method and apparatus for controlling hydrogen gas storage in a clathrate hydrate structure through application of an electromagnetic field. The applied field can be used to control release of gas from the clathrate hydrate structure and/or uptake of gas into the clathrate hydrate structure. The electromagnetic field is arranged to promote hopping of gas molecules between and out of retaining pockets in the clathrate lattice by stimulating vibrations in the lattice that cause apertures into the retaining pockets to flex open. Advantageously, the electromagnetic field may have properties that are selected to promote an increase in the rate gas release or gas uptake without causing dissociation of the lattice. In this scenario, the invention can provide an energy-efficient, rechargeable on-demand supply system for any gas that can be retained within a clathrate hydrate structure.

Disclosed is a solid state hydrogen storage device, capable of providing a weight reduction of a hydrogen storage system while inhibiting heat conduction performance from being degraded, and also of increasing hydrogen storage capacity. The present disclosure provides a heat conduction fin including multiple tube passing holes through which the heat exchange tube passes and linear-shaped connecting portions connecting the tube passing holes to each other, and a solid state hydrogen storage device having the same.

Apparatuses and methods of measuring a hydrogen diffusivity of a metal structure including during operation of the metal structure, are provided. A hydrogen charging surface is provided at a first location on an external surface of the structure. In addition, a hydrogen oxidation surface is provided at a second location adjacent to the first location on the external surface of the structure. Hydrogen flux is generated and directed into the metal surface at the charging surface. At least a portion of the hydrogen flux generated by the charging surface is diverted back toward the surface. A transient of the diverted hydrogen fluxes measured, and this measurement is used to determine the hydrogen diffusivity of the metal structure in service.