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Hydrogen making Al base alloy composite materials, preparation and process of using thereof

A technology of composite materials and base alloys, applied in the field of hydrogen energy, can solve the problems of slow reaction speed, high activity, difficult storage, transportation, etc., and achieve the effects of long duration, increased reaction speed, and improved hydrogen production efficiency

Active Publication Date: 2011-04-20
SF DIAMOND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For alloying methods, generally either the reaction speed is slow, or expensive alloying elements (Ga, In, etc.) with a large content are required; for Al alloy powder, there are disadvantages such as high activity, difficult storage and transportation

Method used

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  • Hydrogen making Al base alloy composite materials, preparation and process of using thereof
  • Hydrogen making Al base alloy composite materials, preparation and process of using thereof
  • Hydrogen making Al base alloy composite materials, preparation and process of using thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Al-Sn / CNTs composites were prepared by high temperature and high pressure method. Al-Sn alloy containing 27wt% Al is smelted and Al-Sn alloy powder is made by a certain method. The size of the powder can vary from 100nm to 1mm. In this example, the size of the powder is about 0.1mm. Multi-walled carbon nanotubes (MWNTs) are prepared by chemical vapor deposition (CVD). These MWNTs have certain orientation and contain a certain proportion of amorphous carbon. According to the ratio of carbon nanotubes to 3% of the mass ratio of the composite material, the carbon nanotubes and Al-Sn alloy powder were mixed and ground for 30 minutes, and then put into the molybdenum cup 5 with a cover. Then, if figure 1 As shown, put the molybdenum cup 5 into the pyrophyllite 2 that is approximately cubic (see figure 1), pyrophyllite 2 is a thermoelectric insulator and is used to transmit pressure. The pyrophyllite 2 has circular openings in two opposite directions into which the molybde...

Embodiment 2

[0032] The preparation method of the composite material of this embodiment (wherein the Al-Sn alloy used is an Al-Sn alloy containing 27wt% Al) is basically the same as that of Embodiment 1, the difference is that when the raw materials are taken, the carbon nanotubes account for the composite material. The ratio of finished product mass to 6% is taken, and the color of the composite material of the finished product is darker than that of the finished product in Example 1. The composite material of the finished product of this embodiment can also directly react with water at room temperature, and the volume of hydrogen gas produced by the reaction of the unit mass of Al-Sn / CNTs composite material sample with water is as follows: image 3 Shown in curve 1. Depend on image 3 It can be seen that the reaction speed of the finished composite material and water increases with the increase of the proportion of CNTs content in the composite material.

Embodiment 3

[0034] In this example, Al-Sn / CNTs composite material is prepared by vacuum suction casting method. Firstly, the carbon nanotubes in Example 1 are pressed into a cylindrical carbon nanotube framework under a certain pressure, and the relative density of the framework increases with the increase of the pressure. The used Al-Sn alloy contains 75wt% Al, and after the alloy is melted, the melt is sucked into the voids of the carbon nanotube skeleton by vacuum suction casting to form the Al-Sn / CNTs composite material. The mass percentage of carbon nanotubes in the composite material obtained by this method can reach 25wt%, and the maximum speed of the reaction between the obtained composite material and water to generate hydrogen is 2-100 times greater than that of the corresponding alloy without adding carbon nanotubes and water. times.

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Abstract

The invention discloses an Al-based alloy composite material used for preparing hydrogen, and a use method thereof; the Al-based alloy composite material consists of Al-based alloy and filler; the Al-based alloy is binary or multi-component alloy consisting of Al, Sn, Zn, Bi, Ga, In, Mg and Pb elements, wherein, the content of Al is 3 weight percent to 95 weight percent, and the rest are one type or more than one type among Sn, Zn, Bi, Ga, In, Mg and Pb; one type or more than one type among inorganic nano-tube, micro-tube, nano-wire and nano-fiber are adopted as the filler; the content of the filler in the Al-based alloy composite material is 1 weight percent to 90 weigh percent; the material of the invention can improve the hydrogen preparation efficiency and is easy to be stored and transported.

Description

technical field [0001] The invention relates to the field of hydrogen energy, in particular to a novel Al-based alloy composite material which can directly and rapidly react with water at room temperature to generate hydrogen, as well as its preparation and use methods. Background technique [0002] As the energy supply becomes more and more tense and the pollution caused by the combustion of primary energy becomes more and more serious, it is increasingly urgent to develop new renewable clean energy. Hydrogen has high heat of combustion and no pollution, so it has become an important renewable energy source. There are many ways to prepare hydrogen, among which metals generate hydrogen through hydrolysis reaction, which is a promising way to produce, store and transport energy. Aluminum, in particular, is rich in resources, has a large hydrogen production capacity (1244L / Kg), and is easy to store. It is a material with long-term sustainable development potential. It has ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/10C01B3/08
CPCY02E60/36
Inventor 张迎九方海江
Owner SF DIAMOND CO LTD
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