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Aluminum alloy for preparing hydrogen by hydrolytic decomposition and preparation thereof

A technology for producing hydrogen and aluminum alloys by hydrolysis, applied in the production of hydrogen and other directions, can solve the problems of strong corrosiveness and slow reaction of lye, and achieve the effects of simple reaction, reduced preparation cost and accelerated hydrolysis

Inactive Publication Date: 2011-04-06
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the lye is too corrosive, and the reaction is slow when the NaOH concentration is low

Method used

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  • Aluminum alloy for preparing hydrogen by hydrolytic decomposition and preparation thereof
  • Aluminum alloy for preparing hydrogen by hydrolytic decomposition and preparation thereof
  • Aluminum alloy for preparing hydrogen by hydrolytic decomposition and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The mechanical ball milling method is adopted, the raw material used is powder, the particle size is between 200um-300um, under the protection of argon, the ball-to-material ratio is 15:1, the ball milling time is 12h, and the rotation speed is 450r / min. Two kinds of aluminum alloys were prepared by mixing according to different stoichiometric ratios.

[0030] The composition of aluminum alloy 1 is as follows: aluminum matrix, 80wt%; metal bismuth, 10wt%; low melting point metal material (zinc powder, particle size 200um, 2wt%) and hydride (calcium hydride, 150um, 8wt%)

[0031] The composition of aluminum alloy 2 is as follows: aluminum matrix, 85wt%; Metal bismuth, 8wt%; Low melting point metal material (indium powder, particle diameter 150um, 2wt%; Tin powder, particle diameter 100um, 3wt%) and hydride (magnesium hydride , particle size 100um, 2wt%) total 7wt%.

[0032] The prepared aluminum alloy can react with water at normal temperature (such as figure 1 Shown),...

Embodiment 2

[0034] The mechanical ball milling method is adopted, the raw material used is powder, the particle size is between 100um-200um, under the protection of argon, the ball-to-material ratio is 15:1, the ball milling time is 12h, and the rotation speed is 450r / min. Aluminum alloy 3 was prepared by mixing according to different stoichiometric ratios.

[0035] The composition of the aluminum alloy is as follows: aluminum matrix, 80wt%; metal bismuth, 8wt%; low melting point metal material (lead particle, 4wt%; gallium, 2wt%) and soluble salt (salt NaCl, 6wt%) The total is 12wt%.

[0036] The prepared aluminum alloy can react with water at normal temperature (such as figure 2 Shown), its reaction rate is very fast, can produce a large amount of hydrogen, and reaches the maximum value in about 15min; The reaction is an exothermic reaction, which can provide moist hydrogen for the fuel cell. The reaction product is black, does not stick to the wall, and is easy to clean.

Embodiment 3

[0038] The difference from Example 1 is that the raw material used is powder, the particle size is between 1um-200um, the mechanical ball milling method is adopted, under the protection of argon, the ball-to-material ratio is 100:1, the ball milling time is 60h, and the rotating speed is 300r / min. Mix according to different stoichiometric ratios to prepare aluminum alloys 4-10.

[0039] The composition of aluminum alloy 4 is as follows: aluminum matrix, 50wt%; metal bismuth, 45wt%; low melting point metal material (tin Sn, 2wt%) and water-soluble compound (barium oxide BaO, 3wt%) total 5wt%.

[0040] The composition of aluminum alloy 5 is as follows: aluminum matrix, 90wt%; metallic bismuth, 8wt%; low melting point metal material (0wt%) and water-soluble compound (potassium hydride KH, 2wt%) totaling 2wt%.

[0041] The composition of aluminum alloy 6 is as follows: aluminum matrix, 70wt%; metal bismuth, 13wt%; low melting point metal material (magnesium powder Mg, 5wt%) and ...

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Abstract

The invention relates to a hydrogen preparation method by hydrolyzing aluminum alloy, in particular to an aluminum alloy which can be hydrolyzed to make hydrogen and a preparation method thereof. The alloy consists of simple-substance metal aluminum, metal bismuth, metals with low melting point and water-soluble compound; according to weight percentage, the content of the metal bismuth is 8 to 50percent, low melting point metal is 0 to 15 percent, water soluble compound is 1 to 40 percent and metal aluminum is 40 to 90 percent. The method of the invention reduces reaction temperature of aluminum hydrolysis, speeds up reaction rate of aluminum hydrolysis, enhances hydrogen yield rate, simplifies reaction devices as well as reduces hydrogen storage cost. The aluminum alloy prepared by the method of the invention is portable easily, is capable of preparing and providing hydrogen at any time and is applicable to providing humid hydrogen for fuel cells.

Description

technical field [0001] The invention relates to hydrogen production by hydrolysis of aluminum alloys, in particular to an aluminum alloy for hydrogen production by hydrolysis and its preparation. Background technique [0002] As a promising energy carrier, hydrogen energy has been widely studied and applied. The rapid development of hydrogen economy has stimulated the research of hydrogen production technology, but the cost of hydrogen storage is high, and the hydrogen content per unit mass is low, and there are various safety problems, so a small, cheap, pollution-free, Safe and reliable hydrogen production technology that can be connected with hydrogen-using equipment has become an urgent need. Current NaBH 4 The hydrolysis hydrogen production technology is very mature, and has been successfully connected with the fuel cell, realizing the immediate production and supply of hydrogen, which can meet the hydrogen source of the 5w-10Kw fuel cell. NaBH 4 The hydrolysis hydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/08C22C21/00
CPCY02E60/36
Inventor 徐芬范美强孙立贤张箭曾巨澜齐燕妮张耀
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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