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Active aluminum-rich alloy for preparing high purity hydrogen through hydrolysis and preparation method thereof

An aluminum alloy, active technology, applied in the field of alloys

Inactive Publication Date: 2012-07-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the powder is not easy to store is also a fatal flaw of this method

Method used

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  • Active aluminum-rich alloy for preparing high purity hydrogen through hydrolysis and preparation method thereof
  • Active aluminum-rich alloy for preparing high purity hydrogen through hydrolysis and preparation method thereof
  • Active aluminum-rich alloy for preparing high purity hydrogen through hydrolysis and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0021] According to the mass ratio of Al 94 (Ga 3.6 In 1.8 sn 0.6 ) 6 Accurately weigh each metal, and use a 25 Kg vacuum induction furnace to smelt the alloy to a liquid state, and its vacuum degree is 10 -2 ~10 -3 Pa; then use electromagnetic stirring technology to stir the liquid alloy for about half an hour; under the protective atmosphere of argon, pour the liquid alloy into a water-cooled copper mold to solidify, and the cooling rate is controlled at 10 1 ~10 3o C / s. The diameter of the alloy ingot is less than 8 cm to ensure the fine grain size of the alloy and the GaIn 3 The distribution of Sn phase is uniform.

[0022] X-ray analysis results show that the alloy is composed of Al and GaIn 3 Sn two-phase composition, see figure 1 ; The microstructure photo shows Al as columnar grains, white granular GaIn 3 The Sn phase is uniformly distributed on the Al grains, see figure 2 ; The results of differential thermal analysis proved that GaIn 3 The melting poi...

Embodiment 2

[0024] According to the mass ratio of Al 85 (Ga 9 In 4.5 sn 1.5 ) 15 Accurately weigh each metal and melt the alloy in a 25 Kg vacuum induction furnace with a vacuum of 10 -2 ~10 -3 Pa. Electromagnetic stirring technology is used to stir the liquid alloy for about half an hour. Under an argon protective atmosphere, the liquid alloy was cast into a water-cooled copper mold for solidification, and the cooling rate was controlled at 10 1 ~10 3o C / s. The diameter of the alloy ingot is less than 8 cm.

[0025] Weigh about 5 mg of the alloy sample and put it into tap water for reaction. The reaction temperature was controlled with a water bath, and the volume of hydrogen gas produced was measured by the drainage method. Figure-5 shows alloy Al 85 (Ga9 In 4.5 sn 1.5 ) 15 The volume of hydrogen produced by reacting with water at different temperatures as a function of time. At a reaction temperature of 60 o C, the hydrogen production rate of the alloy can reach 600 ...

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Abstract

The invention relates to an active aluminum-rich alloy for preparing high purity hydrogen through hydrolysis. The alloy is characterized in that the alloy which is composed of four elements of Al, Ga, In and Sn comprises the following two phases: an Al solid solution and GaIn3Sn. A preparation method of the alloy concretely comprises the following steps: 1, melting the alloy to form a molten alloy by adopting a vacuum induction furnace, wherein the vacuum degree of the vacuum induction furnace is 10<-2>-10<-3>Pa; and 2, stirring the molten alloy by adopting an electromagnetic stirring technology, casting the molten alloy to a water-cooled copper mold, and solidifying, wherein the cooling rate is 101-103DEG C / s. The alloy has the advantages of high hydrogen yield, no pollution, low cost, simple preparation method, convenient operation and the like.

Description

technical field [0001] The invention relates to the field of alloys, and in particular provides an active rich aluminum alloy for hydrolysis to prepare high-purity hydrogen. Background technique [0002] With the decrease of fossil energy and the deterioration of the environment, human beings urgently need to find new energy sources that are environmentally friendly and sustainable. Hydrogen is recognized as an ideal energy source in the future due to its cleanliness, large reserves and high combustion value. At present, the fossil fuel hydrogen production and electrolytic water hydrogen production methods used in industry not only consume a lot of energy, have low efficiency, but also cause serious pollution. Some new technologies, such as photohydrolysis and aluminum hydrolysis, have a low hydrogen production rate; while using sodium borohydride solution to produce hydrogen, the cost is high. Therefore, the promotion and application of the above-mentioned technologies ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/02C01B3/08
CPCY02E60/36
Inventor 汪伟陈德敏杨柯周倩青赵欣明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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