Alloy used for preparing hydrogen gas and method of producing the same

A technology of alloy and hydrogen, which is applied in the field of material preparation and hydrogen preparation, can solve environmental pollution, safety and other problems, and achieve the effects of safe transportation, wide source of raw materials, and simple preparation process

Inactive Publication Date: 2008-05-21
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the environmental pollution and safety problems existing in the hydrogen production process for fuel cells and other hydrogen energy technologies, the object of the present invention is to provide an alloy for preparing hydrogen and its preparation method

Method used

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  • Alloy used for preparing hydrogen gas and method of producing the same
  • Alloy used for preparing hydrogen gas and method of producing the same

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preparation example Construction

[0034] The raw materials for the preparation of the above-mentioned alloys are lithium and aluminum, which can be in the form of powder, flakes, granules and strips, or ingots; 1-x Li x Proportioning is carried out to form a mixture, wherein 0.5<x<0.9, so that the mass percentage of lithium is 20%-70%, and the mass percentage of aluminum is 30%-80%. Batching takes place in a vacuum glove box with water content below 90ppm and oxygen content below 100ppm.

[0035]The above-mentioned alloy is prepared by vacuum smelting method, which is characterized in that the above-mentioned mixed raw materials of lithium and aluminum are smelted under vacuum conditions, and the melting temperature is higher than the melting point of pure aluminum at 680°C. , the specific holding temperature is slightly higher than the liquidus temperature of the Li-Al phase diagram, so that lithium and aluminum can fully react to form β-phase AlLi and triangular rhomboid Al 2 Li 3 and monoclinic Al 4 Li ...

Embodiment 1

[0038] The raw material of lithium metal is commercially available battery grade lithium metal, in the form of flakes Φ25×1mm 3 , with a purity of 99.99%, vacuum-packed in aluminum-plastic bags. Metal aluminum is common aluminum ingot with a purity of 99%. The aluminum ingot is shredded before batching to facilitate weighing and mixing. The raw material ingredients are proportioned according to AlLi to form a mixture, the mass percentage of lithium is 20%, and the mass percentage of aluminum is 80%. The ingredients are operated in a vacuum glove box with dry water and low oxygen content, and the prepared raw materials are sealed in vacuum bags for use.

[0039] The above-mentioned mixed raw materials of lithium and aluminum are melted under vacuum conditions, the pressure is 100Pa, and the melting temperature is 700°C. After the melting is complete, the temperature is lowered to 680°C to keep the alloy melt for 20 minutes, so that the lithium and aluminum can fully react and ...

Embodiment 2

[0043] The raw material of lithium metal is commercially available battery grade lithium metal, in the form of flakes Φ25×1mm 3 , with a purity of 99.99%, vacuum-packed in aluminum-plastic bags. Metal aluminum is common aluminum ingot with a purity of 99%. The aluminum ingot is shredded before batching to facilitate weighing and mixing. Raw material ingredients according to Al 2 Li 3 Proportioning is carried out to form a mixture, the mass percentage of metal lithium is 28%, and the mass percentage of metal aluminum is 72%. The ingredients are operated in a vacuum glove box with dry water and low oxygen content, and the prepared raw materials are sealed in vacuum bags for use.

[0044] The above-mentioned mixed raw materials of lithium and aluminum are melted under vacuum conditions, the pressure is 100Pa, and the melting temperature is 700°C. After the melting is complete, the temperature is lowered to 680°C to keep the alloy melt for 20 minutes, so that the lithium and al...

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Abstract

The invention discloses an alloy which is used for preparing hydrogen and a preparation method hereof. The alloy consists of cubic beta phase AlLi, cubic beta phase AlLi and Al<2>Li<3> of three-square rhombus structure or cubic beta phase AlLi and Al<2>Li<3> of three-square rhombus structure and a single inclined Al<4>Li<9>. Lithium and aluminum are proportioned and mixed according to quality percent content and then the mixture is melted in a vacuum melting device; the melting temperature is higher than that of the melting point of pure aluminum and after the mixture is melted totally, the temperature is reduced to one which is higher than the melting point of the mixed alloy for heat preservation in a fusant state; and then the fusant is cooled until the normal temperature. The mixed alloy and water contact and react to produce high-purity hydrogen. The process for preparing alloy with the invention is simple and convenient and the process of preparing hydrogen through the reaction of alloy and water is fast and safe; the prepared hydrogen is provided with high purity and the hydrogen can be used for various application fields of hydrogen, in particular for hydrogen supply of fuel battery, hydrogen fuel battery used for portable tools and hydrogen gas engine automobile.

Description

technical field [0001] The invention relates to materials preparation and hydrogen preparation technology, in particular to an alloy used to prepare hydrogen and a preparation method thereof. Background technique [0002] As an important gas, hydrogen has been widely used in chemical industry, food and metallurgical material industry, and it is also an important clean energy carrier, which will have broad application prospects in the new century. At present, major countries in the world, including the European Union, the United States, and Japan, are investing huge sums of money in the development and utilization of fuel cells and related technologies, such as fuel cells, which are considered to be ideal alternative power for petroleum vehicles, especially proton exchange membrane fuel cells (PEFC) , is the cutting-edge technology field in the new century to overcome the energy crisis and environmental pollution in the world, especially the research and development of mobile...

Claims

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Application Information

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IPC IPC(8): C22C21/00C22C24/00C22C1/02C01B3/02
Inventor 舒康颖秦来顺史宏声柴文祥
Owner CHINA JILIANG UNIV
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