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Mg-Al-Ni series hydrogen storage particle and catalytic modification preparation method thereof

A hydrogen storage and particle technology is applied in the field of Mg-Al-Ni hydrogen storage materials and their preparation, and can solve the problem of high hydrogen absorption temperature

Inactive Publication Date: 2018-03-06
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to obtain better kinetic performance of hydrogen absorption and desorption without reducing the hydrogen storage capacity of magnesium-based hydrogen storage materials, and at the same time solve the problem of high hydrogen absorption temperature of materials, the present invention proposes a kind of Mg-Al-Ni hydrogen storage particles Catalyzed modified preparation method thereof

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  • Mg-Al-Ni series hydrogen storage particle and catalytic modification preparation method thereof
  • Mg-Al-Ni series hydrogen storage particle and catalytic modification preparation method thereof
  • Mg-Al-Ni series hydrogen storage particle and catalytic modification preparation method thereof

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Embodiment 1

[0037] This embodiment is a kind of Mg-Al-Ni hydrogen storage particles, which are composed of 80 wt.% Mg, 15 wt.% Al and 5 wt.% Ni. The Mg15Al5Ni alloy particles described in this embodiment select bulk Mg with a purity of ≥99.9 wt.%, bulk Al, and powdered Ni with a purity of ≥99.9 wt.%.

[0038] The preparation process of the Mg15Al5Ni alloy ingot proposed in this embodiment is as follows:

[0039] The first step is surface treatment. The surface treatment of the raw materials will remove oil stains and surface oxide scales from the weighed Mg and Al.

[0040] The second step is to prepare Mg15Al alloy ingots. The Mg15Al alloy ingot is prepared by using the well-type resistance furnace and the covering agent protection method. The present invention uses the second covering agent commonly used in industry. The specific process is to weigh 85 wt.% Mg and 15 wt.% Al. In order to prevent the composition deviation caused by the volatilization of magnesium, an additional 5 wt.% of ma...

Embodiment 2

[0049] This embodiment is a kind of Mg-Al-Ni hydrogen storage particles, which are composed of 75 wt.% Mg, 20 wt.% Al and 5 wt.% Ni. In this embodiment, a Mg20Al alloy ingot is prepared in advance by the covering agent protection method, and then Mg20Al5Ni alloy particles are prepared by the high-energy ball milling method. The Mg20Al5Ni alloy particles described in this embodiment select bulk Mg with a purity of ≥99.9 wt.%, bulk Al, and powdered Ni with a purity of ≥99.9 wt.%.

[0050] The preparation process of the Mg20Al5Ni alloy ingot proposed in this embodiment is as follows:

[0051] The first step is surface treatment. The surface treatment of the raw materials will remove oil stains and surface oxide scales from the weighed Mg and Al.

[0052] The second step is to prepare Mg20Al alloy ingots. The Mg20Al alloy ingot is prepared by using the well-type resistance furnace and the covering agent protection method. The present invention uses the second covering agent commonly ...

Embodiment 3

[0061] This embodiment is a kind of Mg-Al-Ni hydrogen storage particles, which are composed of 85 wt.% Mg, 10 wt.% Al, and 5 wt.% Ni. In this embodiment, a Mg10Al alloy ingot is prepared in advance by a covering agent protection method, and then Mg10Al5Ni alloy particles are prepared by a high-energy ball milling method. The Mg10Al5Ni alloy particles described in this embodiment select bulk Mg with a purity of ≥99.9 wt.%, bulk Al, and powdered Ni with a purity of ≥99.9 wt.%.

[0062] The preparation process of the Mg10Al5Ni alloy ingot proposed in this embodiment is as follows:

[0063] The first step is surface treatment. The surface treatment of the raw materials will remove oil stains and surface oxide scales from the weighed Mg and Al.

[0064] The second step is to prepare Mg10Al alloy ingots. The Mg10Al alloy ingot is prepared by using the well-type resistance furnace and the covering agent protection method. The present invention uses the second covering agent commonly use...

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Abstract

The invention discloses an Mg-Al-Ni series hydrogen storage particle and a catalytic modification preparation method thereof. The Mg-Al-Ni series hydrogen storage particle is prepared from 75 to 85 weight percent of Mg, 10 to 20 weight percent of Al and 5 weight percent of Ni. The catalytic modification preparation method comprises the following steps: preparing in advance by adopting a cover agent protection method to obtain a magnesium-aluminum alloy; and then powdering the magnesium-aluminum alloy by using mechanical lapping and subsequently adding nickel powder into the alloy and refiningthe sizes of grains by adopting high-energy ball milling technical means. The alloy obtained by the method disclosed by the invention is prepared from a primary alpha-Mg matrix, beta-Mg17Al12 with mesh or blocky distribution and an Mg+Mg17Al 12 co-crystal. The Ni element added by the high-energy ball milling technology uniformly covers the surfaces of Mg-Al particles in an elemental form. After three times of hydrogenation and dehydrogenation cycle activation, compared with the Mg-Al-Ni alloy particles with same components, the Mg-Al-Ni alloy particles added with Ni powder has the advantage that the hydrogen absorption capacity in the Mg-Al-Ni alloy particles can be up to 4.36 weight percent.

Description

Technical field [0001] The invention relates to the field of magnesium-based hydrogen storage materials, in particular to a Mg-Al-Ni series hydrogen storage material with high hydrogen storage capacity and low hydrogen absorption temperature and a preparation method thereof. Background technique [0002] Due to the increasing depletion of fossil energy and the accelerated emission of greenhouse gases, mankind has to seek new energy sources to solve future life needs. The energy system of the future should be clean, easily available, reliable, and efficient. Research on sustainable green energy and its use technology to meet the increasing energy demand has become the focus of research. Considering the carbon balance and zero emission of energy, hydrogen, as one of the most abundant elements in nature, has become the first choice of people. Wide sources, recyclability, and zero emissions are the three major advantages of hydrogen energy as a future energy source. But up to now,...

Claims

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Application Information

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IPC IPC(8): C22C23/02C22C1/02C22C1/06B22F1/00B22F9/04
CPCC22C23/02B22F1/0003B22F9/04B22F2009/043C22C1/02C22C1/06C22C2202/04
Inventor 张铁邦陈浩解立帅宋霖
Owner NORTHWESTERN POLYTECHNICAL UNIV
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