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.

Recovery of hydrogen from an ammonia cracking process in which the cracked gas is purified in a PSA device is improved by using a membrane separator on the PSA tail gas.

The present invention provides an impregnated catalyst composition for production of pure hydrogen comprising: 10 wt %-50 wt % metal oxide; 1 wt %-15 wt % promoter; and 60 wt %-90 wt % support material. Another aspect of the present invention is to provide a method of preparation of an impregnated catalyst for pure hydrogen production (10) and a method for producing pure hydrogen (20) according to the impregnated catalyst of the present invention. The present invention is able to reduce the reaction temperature by 1 to 2 folds and also able to reduce the usage of energy but maintain its good production quality. Besides, selectivity of the present invention is high, hence able to produce high purity of hydrogen.

A system for generating hydrogen includes an ammonia decomposition bed configured to introduce an ammonia gas, decompose the ammonia gas into a high-pressure first mixed gas including nitrogen and hydrogen, and discharge the high-pressure first mixed gas; an ammonia adsorption bed supplied with the high-pressure first mixed gas from the ammonia decomposition bed, and configured to adsorb ammonia of the first mixed gas, and discharge a high-pressure second mixed gas including nitrogen and hydrogen; and a nitrogen adsorption bed directly supplied with the high-pressure second mixed gas from the ammonia adsorption bed, and configured to adsorb the nitrogen, and discharge the hydrogen.

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 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.

The present disclosure discloses a device for producing hydrogen through photothermal coupling of solar energy based on a frequency division technology, including a photothermal coupling reactor and a liquid storage tank and so on; during operation, a test sample containing a photothermal catalyst is placed in the photothermal coupling reactor, a light source is divided into an infrared light part and an ultravioiet light part through the solid-state frequency divider, energy of the infrared light part is finally transferred to the photothermal coupling reactor, and the ultraviolet light part is projected onto the photothermal catalyst. The present disclosure is used for an experiment for producing hydrogen through photothermal coupling of catalyst particles, and has advantages of environmental protection, high efficiency, simple and convenient operation and the like.

A method for preparing a metal-free few-layer phosphorous nanomaterial. The method comprises an ice-assisted exfoliation process (or solvent ice-assisted exfoliation process). The method allows for the preparation of a few-layer phosphorous nanomaterial with improved yield and reduced duration and exfoliation power. The few-layer phosphorous nanomaterial is used in the preparation of a photocatalyst. The photocatalyst exhibits a long-term stability, high photocatalytic H.sub.2 evolution efficiency from water, and good stability under visible light irradiation.

The present disclosure provides perovskite catalytic materials and catalysts comprising platinum-group metals and perovskites. These catalysts may be used as oxygen storage materials with automotive applications, such as three-way catalysts. They are also useful for water or CO.sub.2 reduction, or thermochemical energy storage.

Disclosed is a hydrogen generation furnace using decomposition of biomass steam, which employs an infrared source and a furnace body with a water-accommodating structure. A steam separation-drying device is cylindrical and provided at an upper part of an interior of the furnace body and a cavity of the steam separation-drying device forms a secondary gasifier. A lattice plate is provided at a bottom of the interior of the furnace body. A lattice combustion grate is provided above a middle of the lattice plate. A steam distributor is provided outside a lower part of the furnace body. The furnace of the invention performs gasified gas separation as well as secondary oxidation and gasification and mixes steam with gas generated from biomass to perform a decomposition reaction for generating hydrogen.