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Al-NaBiO3 composite materials used for hydrogen generation by hydrolysis and preparation thereof

A composite material and hydrogen production technology by hydrolysis, applied in the field of high-activity aluminum-based composite materials for mobile hydrogen sources, can solve the problems of high starting temperature of aluminum-water reaction and unsustainable reaction, and achieve low raw material price, light weight, and improved reaction active effect

Inactive Publication Date: 2013-12-04
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

[0006] The purpose of the present invention is to provide a composite material for mobile hydrogen source with high activity and high energy density, which can be started at room temperature, so as to solve the problems that the starting temperature of aluminum water reaction is too high and the reaction cannot be continued

Method used

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  • Al-NaBiO3 composite materials used for hydrogen generation by hydrolysis and preparation thereof
  • Al-NaBiO3 composite materials used for hydrogen generation by hydrolysis and preparation thereof
  • Al-NaBiO3 composite materials used for hydrogen generation by hydrolysis and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Under the protection of argon, the mass distribution is m(Al):m(NaBiO 3 ) = 0.9:0.1 aluminum and sodium bismuthate components are added to the steel ball milling tank, select the ball milling parameters with a rotating speed of 500 rpm and a ball-to-material ratio of 60:1, and place the ball milling tank on the QM-3SP2 planetary ball mill High-speed ball milling, ball milling for 10 hours to obtain a highly active hydrolysis hydrogen production composite material with uniform composition.

[0031] Weigh 0.05g sample into the reaction bottle, seal it well and add different proportions of deionized water. The hydrogen gas produced in the experiment was introduced into an inverted measuring cylinder filled with water through a catheter, and the data was recorded manually with a stopwatch. By changing the experimental temperature, the hydrolysis hydrogen release performance of the sample at room temperature and different temperatures was obtained.

[0032] Depend on figu...

Embodiment 2

[0034] Under the protection of argon, the mass distribution is m(Al):m(NaBiO 3 )=0.9:0.1 aluminum and sodium bismuthate components were added to the steel ball mill jar, and the ball mill parameters were consistent with Example 1.

[0035] After the composite material sample is obtained, place it open in the air, make it fully contact with water and oxygen in the air for different times, weigh 0.05g sample into the reaction bottle, seal it and add 5mL deionized water, sample test method Consistent with Example 1.

[0036] Depend on image 3 It can be seen that Al-NaBiO 3 The composite material has excellent oxidation resistance in the air, and the hydrogen desorption performance still does not decrease significantly after being placed in the air at room temperature for ten days.

Embodiment 3

[0038] Under argon protection, aluminum and sodium bismuthate components in different mass ratios were added into a steel ball mill jar, and the ball mill parameters were consistent with those in Example 1. Weigh 0.05g of sample into the reaction bottle, seal it and add 5mL of deionized water. The sample testing method is consistent with that of Example 1.

[0039] Depend on Figure 4 It can be seen that Al-NaBiO 3 Hydrogen release performance of composites increased with NaBiO 3 increased rapidly with the increase of doping amount, indicating that NaBiO 3 It is a very effective dopant for activating aluminum.

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Abstract

The invention discloses preparation of a series of efficient composite materials used for hydrogen generation by hydrolysis. According to the composite materials, a material which is used for hydrogen generation by hydrolysis and has excellent performances is obtained by adding a small amount of sodium bismuthate into an aluminum substrate. Based on the Al-NaBiO3 composite material, a small amount of NaCl or KCl is added to improve oxidation resistance of the composite materials in air at room temperature. A preparation method comprises steps of weighing various raw material powder needed according to a ratio and adding into a steel ball milling jar, performing high-speed ball-milling in a QM-3SP2 planetary ball mill, and feeding argon into the ball milling jar for protection to obtain the hydrogen generating materials with uniform components and high activity. According to the composite materials and the preparation, the preparation technology is simple; the cost for the raw materials is low; and the composite materials have high energy density, high hydrogen releasing rate and good oxidation resistance in air, and are suitable for applications in real-time vehicle-loading hydrogen supplying, and the like.

Description

technical field [0001] The invention relates to a high-activity aluminum-based composite material for a mobile hydrogen source. Specifically, by adding specific additives, the hydrolysis performance of metal aluminum is greatly improved to meet the needs of practical application under conventional conditions. Background technique [0002] As a promising energy carrier, hydrogen energy has been extensively studied and applied in recent years. 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 equipment has become an urgent need (1.T.Ma, J.Ji, M.Q.Chen, Int.J.Hydrogen Energy 35(2010) 3114-3119.2.M.Hori, R.S. Hayano, M. Fukuta, T. Koyama, H. Nobusue, J. Tanaka, Rev. Sci. Instrum. ...

Claims

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Application Information

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IPC IPC(8): C01B3/08
CPCY02E60/36
Inventor 孙立贤王爽徐芬张箭李芬刘加成
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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