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Magnesium hydride based composite powder

A technology of composite powder and magnesium hydride, applied in the field of composite materials, can solve the problem that MgH2 hydrogen release performance does not show promotion and other problems, and achieve the effects of remarkable kinetic performance, good catalytic effect and simple preparation process

Inactive Publication Date: 2011-05-18
张文丛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And the addition of aluminum to MgH 2 The dehydrogenation performance of the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: A kind of magnesium hydride-based composite powder, its raw material comprises nano-scale Mg powder, nano-Ni and MnO 2 particles. Mixed into the planetary ball mill, the mass percentage of each component in the mixture is: Mg powder 99%, nano-Ni 0.5%, MnO 2 Granules 0.5%. It is produced by hydrogen-filled ball milling. The specific parameters are: hydrogen-filled (0.4MPa) ball milling in a planetary ball mill for 100 hours, the ball-to-material ratio is 20:1, and the milling speed is 180r / min. The obtained magnesium hydride composite powder contains: magnesium hydride powder with a grain size of 15-50nm, nano-nickel (Ni) powder, nano-sized MnO 2 particles. The hydrolysis rate of the composite powder is significantly improved with the increase of temperature. After the temperature exceeds 60°C, the magnesium hydride-based composite powder can release more than 90% of the theoretical hydrogen storage capacity of hydrogen within 20 minutes in double dist...

Embodiment 2

[0013] Example 2: A magnesium hydride-based composite powder, the raw materials of which include nano-scale Mg powder, nano-Mn and NiO particles. Mixed and added to the planetary ball mill, the mass percentage of each component in the mixture is: Mg powder 95%, nanometer Ni 1.0%, MnO 2Granules 4.0%. It is produced by hydrogen-filled ball milling. The specific parameters are: hydrogen-filled (0.4MPa) ball milling in a planetary ball mill for 100 hours, the ball-to-material ratio is 20:1, and the milling speed is 180r / min. The obtained magnesium hydride composite powder contains: magnesium hydride powder with a grain size of 20-50nm, nanometer manganese (Mn) powder, and nanoscale NiO particles. The hydrolysis rate of the composite powder is significantly improved with the increase of temperature. The composite powder is hydrolyzed in fresh lake water at 70°C for 20 minutes, and hydrogen gas exceeding 90% of the theoretical hydrogen storage capacity is released. Mg(OH) genera...

Embodiment 3

[0014] Example 3: A magnesium hydride-based composite powder, the raw materials of which include nano-sized Mg powder, nano-Co and CuO particles. Mixed and added to a planetary ball mill, the mass percentage content of each component in the mixture is: Mg powder 98%, nanometer Co 0.5%, CuO particles 1.5%. It is produced by hydrogen-filled ball milling. The specific parameters are: hydrogen-filled (0.4MPa) ball milling in a planetary ball mill for 100 hours, the ball-to-material ratio is 20:1, and the milling speed is 180r / min. The obtained magnesium hydride composite powder contains: magnesium hydride powder with a grain size of 15-50 nm, nanometer cobalt (Co) powder, and nanoscale CuO particles. The hydrolysis rate of the composite powder is significantly improved with the increase of temperature. After the temperature exceeds 60°C, the magnesium hydride-based composite powder can release more than 90% of the theoretical hydrogen storage capacity of hydrogen within 20 minut...

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Abstract

The invention relates to a magnesium hydride based composite powder. The magnesium hydride based composite powder is prepared by taking nano Mg powder as a base material. The quality percentage contents of the metal particles and the metal oxide particles in the mixture are as follows: Mg powder accounts for 95-99%, the metal particles account for 0.5%-4.0% and the metal oxide particles account for 0.5%-4.0%. The metal particles are one or more of manganese, iron, cobalt, nickel and copper. The metal oxide particles are one or more of manganese oxide, iron oxide, cobalt oxide, nickel oxide and copper oxide. Nano crystal hydrogenated magnesium composite powder is obtained by filling the mixture through hydrogen filling ball-milling in a ball grinder. The invention has the advantages of reasonable composition, simple preparation process, low cost, hydrogen storage performance and remarkably dynamics property, is used for hydrolyzing for producing hydrogen, and has better water quality adaptability and temperature adaptability; and a hydrolysis product is safe and non-toxic so as to be environmental-friendly.

Description

technical field [0001] The invention relates to a composite material, specifically a magnesium hydride-based composite powder. It is used for hydrolysis to produce hydrogen. technical background [0002] my country is rich in magnesium resources, magnesium hydride (MgH 2 ) is cheap as a hydrogen source, so it is considered as a material suitable for hydrogen production by hydrolysis. Compared with other hydrogen production methods, the hydrolysis hydrogen production method has the advantages of high hydrogen storage capacity, the ability to react and release hydrogen at room temperature, high hydrogen storage safety performance, non-toxic hydrolyzed products, and cheap raw materials. It can be used for proton exchange membrane fuel cells, etc. Uses Provide a convenient and safe source of hydrogen. When considering the mass of water involved in the reaction, the theoretical hydrogen production rate of the hydrolysis reaction was 7.69%. In fuel cell applications, if the wa...

Claims

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Application Information

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IPC IPC(8): C01B3/06
CPCY02E60/362Y02E60/36
Inventor 张文丛于洋于元春
Owner 张文丛
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