Provided is a boiler configured to perform heating by a heat generation section provided with heat generation bodies in a container and capable of properly charging a circulation path including, as part thereof, the inside of the container with required gas. A boiler includes: heat generation bodies; a container configured such that the heat generation bodies are provided inside and configured chargeable with gas with higher specific heat than that of air; and a circulation path including, as part thereof, the inside of the container, the circulation path being a path in which gas circulates. When the charging process of charging the circulation path with the gas is performed, a circulation amount and a gas concentration in the circulation path are monitored.

A catalyst for a dehydrogenation reaction includes a carrier including Al.sub.2O.sub.3 having a theta (θ) phase, an active metal supported on the carrier and including a noble metal, and an auxiliary metal supported on the carrier and different from the active metal.

Provided is a core/shell composite that includes a core portion containing a heat resistant material selected from an inorganic oxide, a ceramic, a mineral and the like and having rigidity, and at least one layer of shell portion containing a hydrogen absorbing/desorbing metal covering the entire or a part of the core portion. The heat resistant material contained in the core portion has a melting point higher than the highest melting point among the hydrogen absorbing/desorbing metal contained in the shell portion. In a method for producing the core/shell composite, the core portion is covered with the shell portion by deposition in the absence of oxygen.

A battery includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and an accommodating bag accommodating the electrode group along with an alkali electrolyte solution. The air electrode includes a catalyst for an air secondary battery. This catalyst for an air secondary battery is produced by a method for producing a catalyst for an air secondary battery, the method including a precursor preparation step of preparing a bismuth-ruthenium oxide precursor, a calcination step of calcining the bismuth-ruthenium oxide precursor obtained in this precursor preparation step to form a bismuth-ruthenium oxide, and a nitric acid treatment step of immersing the bismuth-ruthenium oxide obtained by this calcination step in a nitric acid aqueous solution.

Low temperature synthesis, growth and doping methods and resulting materials are disclosed. According to an aspect, a method for material transformation includes providing a target material comprising carbon and/or hydrocarbon. The method also includes placing the target material within a fluid comprising a hydrogen source. Further, the method includes applying energy to the target material such that at least some of the target material is transformed to the same material with new beneficial bonding configuration.

A hydrogen storage system includes a pressure-sealed sleeve defining an interior and having an outlet, a shaft extending through the interior of the sleeve, a set of porous chambers arranged axially along and concentric to the shaft, and a hydrogen storage, wherein at least some hydrogen gas is supplied to the outlet.

A system for use with contaminated land comprises: a region defined by or within the land, the region having a plurality of locations defined therewithin; at each location, one or more apparatus selected from the group comprising: sensor, well, electrode, cathode, injector and vent; an array of photovoltaic cells for producing DC power; a ground-mounted frame supporting the array, the frame having a boundary substantially contiguous with the region and supporting the photovoltaic cells; a fluid distribution system of conduits supported by the frame; a power system for delivering DC power to each of the locations; and a communication system adapted to provide for remote control of the apparatus.

A system for use with contaminated land comprises: a region defined by or within the land, the region having a plurality of locations defined therewithin; at each location, one or more apparatus selected from the group comprising: sensor, well, electrode, cathode, injector and vent; an array of photovoltaic cells for producing DC power; a ground-mounted frame supporting the array, the frame having a boundary substantially contiguous with the region and supporting the photovoltaic cells; a fluid distribution system of conduits supported by the frame; a power system for delivering DC power to each of the locations; and a communication system adapted to provide for remote control of the apparatus.

A hydrogen production system includes: a hydrogen compound slurry in which a hydrogen compound member is suspended in a solvent containing water; a first vessel; a second vessel having an internal temperature higher than that of the first vessel; a first passage connecting the first vessel and the second vessel; and a second passage connecting the first vessel and the second vessel and different from the first passage. The hydrogen production system is configured to allow the hydrogen compound slurry contained in the first vessel to move into the second vessel through the first passage, and the hydrogen compound slurry contained in the second vessel to move into the first vessel through the second passage.

A dehydrogenation reaction apparatus and a system including the same are disclosed. The dehydrogenation reaction apparatus includes: a main housing; and a dehydrogenation reactor which is provided inside of the main housing and has a catalyst provided inside. In particular, the dehydrogenation reactor generates hydrogen from a liquid organic hydrogen carrier (LOHC). The dehydrogenation reaction apparatus further includes: a heating device provided inside of the main housing and configured to apply heat to the dehydrogenation reactor through a phase change material, where the phase change material is provided between the main housing, and the dehydrogenation reactor and the heating device.