Aluminum alloy for preparing hydrogen by hydrolytic decomposition and preparation thereof

A technology for producing hydrogen and aluminum alloy by hydrolysis, which is applied in the production of hydrogen, etc. It can solve the problems of strong causticity and slow reaction of lye, and achieve the effects of simple reaction, reduced production cost and accelerated hydrolysis

Inactive Publication Date: 2008-10-22
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-battery ratio is 15:1, the ball milling time is 12h, and the rotation speed is 450r / min. Mix according to different stoichiometric ratios to prepare two aluminum alloys.

[0030] The composition of aluminum alloy 1 is as follows: aluminum matrix, 80wt%; metallic 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%; metallic bismuth, 8wt%; low melting point metal material (indium powder, particle size 150um, 2wt%; tin powder, particle size 100um, 3wt%) and hydride (magnesium hydride) , The particle size is 100um, 2wt%) the total is 7wt%.

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

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-battery ratio is 15:1, the ball milling time is 12h, and the rotation speed is 450r / min. Mix according to different stoichiometric ratios to prepare aluminum alloy 3.

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

[0036] The prepared aluminum alloy can react with water at room temperature (such as figure 2 (Shown), the reaction rate is very fast, can produce a large amount of hydrogen, and reach the maximum in about 15 minutes; the reaction is an exothermic reaction, which can provide humidified 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 and 200um, and the mechanical ball milling method is used. Under the protection of argon, the ball-to-material ratio is 100:1, the ball milling time is 60h, and the speed is 300r / min. Mix according to different stoichiometric ratios to prepare aluminum alloy 4-10.

[0039] The composition of the aluminum alloy 4 is as follows: aluminum matrix, 50wt%; metallic 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%) total 2wt%.

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

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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 50 percent, 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 from aluminum alloy by hydrolysis, in particular to an aluminum alloy for hydrogen production by hydrolysis and preparation thereof. Background technique [0002] As a promising energy carrier, hydrogen energy has been studied and applied more and more widely. The rapid development of hydrogen economy has stimulated the research of hydrogen production technology, but the cost of hydrogen storage is very high, and the hydrogen content per unit mass is low, and there are various safety problems. Therefore, the development of small, cheap, pollution-free, A safe and reliable hydrogen production technology that can be connected with hydrogen equipment has become an urgent need. Currently NaBH 4 Hydrolysis hydrogen production technology is very mature, and successfully docked with fuel cells, realizing the immediate production and supply of hydrogen, which can meet the hydrogen source of 5w-10Kw fuel cells. NaBH 4 Hyd...

Claims

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Application Information

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Patent Type & Authority Applications(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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