A method and a system for preparing a safe high heating value fuel gas. In the method, the hydrogen, oxygen and water generated by means of electrolysis are formed into molecular groups by means of hydrogen bond resonance within water molecules. The molecular groups are reformed by using a reforming liquid to obtain a high heating value fuel gas, wherein the reforming liquid comprises hydrocarbon C.sub.xH.sub.2x+2 and/or hydrocarbon C.sub.xH.sub.2x+2O. The high heating value fuel gas prepared by the aforementioned method is safe, easily stored, high in heating value while having no impact on the environment.

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.

This disclosure relates to novel manganese hydrides, processes for their preparation, and their use in hydrogen storage applications. The disclosure also relates to processes for preparing manganese dialkyl compounds having high purity, and their use in the preparation of manganese hydrides having enhance hydrogen storage capacity.

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<x?8. Also disclosed are methods of making said materials and various uses of said materials.

Processes and systems are provided to enhance the rates of absorption and desorption of hydrogen into and out of a metal hydride composite material as part of a system for storing and/or compressing hydrogen. The rates of absorption and desorption are enhanced by techniques that enhance heat transfer between metal hydride composite material and a heat exchanger. Embodiments include the use of thermally conductive adhesive, grease or solder between the metal hydride composite material and heat exchanger element, snugly wrapping the metal hydride-heat exchanger element assembly with an expanded metal sheath or a flexible wire, and combinations thereof.

A hydrogen storage system includes a pressure-sealed storage unit defining an interior and having an outlet, an upper manifold and a lower manifold separated by a dividing plane having a set of ports, a set of chambers, and a hydrogen storage, wherein at least some hydrogen gas is supplied to the outlet.

Provided herein are the metalloborane compounds, MOF-metalloborane compositions, and hydrogen storage system used for high density hydrogen storage. The compounds and compositions may have the structure M.sub.2B.sub.6H.sub.6 or MOF-M.sub.2B.sub.6H.sub.6-dicarboxylic acid. Particularly the transition metal M may be titanium or scandium and the MOF may be MOF5. The hydrogen storage systems hydrogen absorbed to the metalloborane compounds or to the MOF-metalloborane compositions. Methods of storing hydrogen are provided comprising flowing or passing hydrogen gas for absorptive contact with the metalloborane compounds or to the MOF-metalloborane compositions. Also provided is a method for calculating the hydrogen storage capacity of a metalloborane is provided in which random sampling of the thermodynamic states of a two-system model of hydrogen in the presence of a metal organic framework-metalloborane crystal structure is used to calculate probability of hydrogen absorption.

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 invention relates to novel branched hydrogen carrier compounds and so to a method for producing hydrogen from said branched hydrogen carrier compounds. The present invention also relates to a process for producing and for regenerating said branched hydrogen carrier compounds.

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.