Hydrogen preparing process by reacting surface-modified pure alminuim powder with water

A technology of surface modification and process method, applied in the direction of hydrogen production, etc., can solve the problems of strong alkali pollution, slow reaction of metal Fe, etc., and achieve the effect of cheap price

Inactive Publication Date: 2008-10-15
刘雨坤
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Use NaBH 4 As a hydrogen production material, the problem is that NaOH must be used as a solution stabilizer, so there is a problem of s

Method used

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  • Hydrogen preparing process by reacting surface-modified pure alminuim powder with water
  • Hydrogen preparing process by reacting surface-modified pure alminuim powder with water
  • Hydrogen preparing process by reacting surface-modified pure alminuim powder with water

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Embodiment 1

[0035] Example 1: A certain amount of Al powder with a particle size of 3 μm and a certain amount of Al(OH) with a particle size of 3 μm 3 After the powder is evenly mixed, an appropriate amount of ethanol is added, the mixed powder is ball-milled for 48 hours, and then dried. The dried mixed powder is pressed into a block with a unidirectional pressure of 120MPa; the block is heated to 600°C with a heating rate of 1°C / min under vacuum, and sintered and calcined for 1 hour, and then cooled to room temperature; the calcined block After the body is crushed and sieved, the surface is treated with γ-Al 2 o 3 Modified Al powder.

[0036] React the above-mentioned modified and activated aluminum powder with pure water under normal pressure and normal temperature of 18°C ​​to generate hydrogen gas. The reaction equation is:

[0037]

[0038]The reaction can produce up to 4.8 mass% hydrogen (the ratio of the weight of hydrogen produced to the total weight of aluminum and water)....

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Abstract

The invention relates to a process for producing hydrogen through the reaction between surface modified aluminum powder and water, which is a novel portable process for producing hydrogen, and can be directly used for providing hydrogen sources for the fuel cells of various portable devices. The process belongs to the technology field of chemical engineering, mixes the oxides of Al2O3, TiO2 or ZrO2 or the hydroxides of Al2O3, TiO2 or ZrO2 with a certain amount of aluminum powder, and then the mixture of the oxides or the hydroxides and the aluminum powder are cold pressed into a block; the block is heated under the vacuum environment, calcined for 1 to 2 hours within the temperature range of 600 to 650 DEG C, and then cooled to room temperature; the surface modified activated aluminum powder is obtained after the calcined block is grinded and sieved; the surface modified aluminum powder reacts under normal atmosphere and at the temperature between 18 DEG C to 50 DEG C in order to produce hydrogen; and the equation for the reaction between the aluminum and the water is as follows: Al + 3H2O - Al (OH)3+3/2H2. The process is simple; the hydrogen can be produced under normal temperature and normal atmosphere without the need of acid, alkali or catalyst, and moreover, the reaction products are chemically neutral and do not pollute environment; furthermore, the costs and expenses are much lower; and the process for producing hydrogen through the reaction between surface modified aluminum powder and water has positive significance in providing hydrogen for small fuel cells.

Description

technical field [0001] The invention relates to a process method for producing hydrogen by reacting surface-modified aluminum powder with water, which is a new portable hydrogen production method and can directly provide hydrogen sources for fuel cells of many portable devices. The invention belongs to the technical field of chemistry and chemical engineering. Background technique [0002] Fuel cells have high efficiency and low pollution due to the direct conversion of chemical energy into electrical energy. Although solid oxide fuel cells and vehicles driven by polymer fuel cells have attracted much attention, they are still in the research and development stage due to high costs, and the conditions for promotion are not yet available in the short term. Nonetheless, the development of small polymer electrolyte fuel cells is approaching the commercialization stage. A report released by the world-renowned consulting firm Deloitte Consulting predicts that fuel cells will be...

Claims

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Application Information

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IPC IPC(8): C01B3/08
CPCY02E60/36
Inventor 邓振炎
Owner 刘雨坤
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