A catalyst used for dehydrogenation of an organic hydrogen-storage material to generate hydrogen, a support for the catalyst, and a preparation process thereof are presented. A hydrogen-storage alloy and a preparation process thereof are also provided. A process for providing high-purity hydrogen, a high-efficiently distributed process for producing high-purity and high-pressure hydrogen, a system for providing high-purity and high-pressure hydrogen, a mobile hydrogen supply system, and a distributed hydrogen supply apparatus are also described.

A catalyst used for dehydrogenation of an organic hydrogen-storage material to generate hydrogen, a support for the catalyst, and a preparation process thereof are presented. A hydrogen-storage alloy and a preparation process thereof are also provided. A process for providing high-purity hydrogen, a high-efficiently distributed process for producing high-purity and high-pressure hydrogen, a system for providing high-purity and high-pressure hydrogen, a mobile hydrogen supply system, and a distributed hydrogen supply apparatus are also described.

The invention relates to metal hydrides for storing hydrogen, in particular AB2 based metal hydrides, methods of production and uses thereof.

A device for in-situ hydrogen absorption and hydrolysis hydrogen production based on magnesium-based solid hydrogen storage alloys and use thereof are provided. The device can directly inject hydrogen into a stainless steel tank to allow the magnesium alloy absorbing hydrogen to generate the hydrogenated magnesium alloy. When hydrogen is needed later, water is introduced to hydrolyze the hydrogenated magnesium alloy to produce the hydrogen. In this process, the magnesium alloy does not need to be taken out and exposed to the air after absorbing hydrogen, nor does it need further treatment, such that the hydrogen absorption and hydrolysis hydrogen production of the magnesium alloy can be completed in steps in the same device, which greatly saves manufacturing time and cost of the hydrolysis hydrogen production tank.

Provided is a continuous annealing line capable of producing a steel sheet excellent in hydrogen embrittlement resistance. A continuous annealing line 100 comprises: a payoff reel 10 configured to uncoil a cold-rolled coil C to feed a cold-rolled steel sheet S; an annealing furnace 20 configured to continuously anneal the cold-rolled steel sheet S and including a heating zone 22, a soaking zone 24, and a cooling zone 26 that are arranged from an upstream side in a sheet passing direction; a downstream line 30 configured to continuously pass the cold-rolled steel sheet S discharged from the annealing furnace 20 therethrough; a tension reel 50 configured to coil the cold-rolled steel sheet S; and a sound wave irradiator 60 configured to irradiate the cold-rolled steel sheet S being passed from the cooling zone 26 to the tension reel 50 with sound waves.

Hydrogen storage materials being inexpensive and having hydrogen absorption (storage) and desorption properties suitable for hydrogen storage are provided. The hydrogen storage materials have alloys with an elemental composition of Formula (1), a hydrogen storage container containing the hydrogen storage material, and a hydrogen supply apparatus including the hydrogen storage container:
La.sub.aCe.sub.bSm.sub.cNi.sub.dM.sub.e (1)
wherein M is Mn or both of Mn and Co, a satisfies 0.60a0.90, b satisfies 0b0.30, c satisfies 0.05c0.25, d satisfies 4.75d5.20, e satisfies 0.05e0.40, a+b+c=1, and d+e satisfies 5.10d+e5.35.

Provided herein is a steel material with a good fatigue property in a high-pressure hydrogen gas environment, which is suitable for a steel structure used in a high-pressure hydrogen gas environment, such as a line pipe for 100% hydrogen gas or a natural gas containing hydrogen at a hydrogen partial pressure of 1 MPa or more (natural gas is a gas containing hydrocarbons, such as methane and ethane, as main components), a method for producing the steel material, a steel pipe, and a method for producing the steel pipe. The steel material with a good fatigue property in hydrogen has a specific chemical composition and a specific microstructure and has a crack growth rate da/dN of 1.010.sup.6 m.Math.cycle.sup.1 or less at a stress intensity factor of 20 MPa m in hydrogen of 1 MPa or more.

The present disclosure is directed to methods of preparing substantially spherical metallic alloyed particles, having micron and sub-micron (i.e., nanometer)-scaled dimensions, and the powders so prepared, as well as articles derived from these powders. In particular embodiments, these metallic alloyed particles, comprising rare earth metals, can be prepared in sizes as small 80 nm in diameter with size variances as low as 2-5%.

The present disclosure is directed to methods of preparing substantially spherical metallic alloyed particles, having micron and sub-micron (i.e., nanometer)-scaled dimensions, and the powders so prepared, as well as articles derived from these powders. In particular embodiments, these metallic alloyed particles, comprising rare earth metals, can be prepared in sizes as small 80 nm in diameter with size variances as low as 2-5%.