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Hydrogen preparation method and apparatus

A hydrogen and metal borohydride technology, which is applied in the field of electrochemistry to achieve the effects of high efficiency, wide range of raw materials and good catalytic performance

Inactive Publication Date: 2010-05-12
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can achieve high-efficiency hydrogen production under normal temperature and pressure conditions, its wide application is limited due to the use of precious metals such as Pt, Pd, Ru or hard-to-activate metals such as Co and Ni.

Method used

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  • Hydrogen preparation method and apparatus
  • Hydrogen preparation method and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: with 11.9g NiCl 2 ·6H 2 O is dissolved in twice distilled water and is made into 6wt% aqueous solution, adds 16g high specific surface activated carbon under constant stirring, is cooled to below 10 ℃ with mixture being placed in ice-water bath, then slowly drips the sodium borohydride aqueous solution of 5wt%, keeps The reaction temperature is still below 10°C. Nickel boride precipitates are formed through chemical redox reaction, which are evenly dispersed on the surface of the porous carrier. Drying under inert atmosphere for 24 hours promptly obtains the required catalyst of the present invention. The loading of the highly dispersed catalyst obtained is about 20wt%.

Embodiment 2

[0023] Example 2: Dissolve 3.04g of ferric nitrate in twice-distilled water to form a 10wt% aqueous solution, add 0.3g of high specific surface acetylene black under constant stirring, place the mixture in an ice-water bath and cool it to 2°C, then slowly drop Add 5wt% potassium borohydride aqueous solution or alkaline aqueous solution, produce iron boride precipitation through chemical oxidation-reduction reaction, evenly disperse on the surface of porous carrier, after the reaction is complete, centrifugally filter and wash the loaded catalyst powder, and Dry in air to obtain the desired catalyst of the present invention. The loading of the resulting highly dispersed catalyst was about 80 wt%.

Embodiment 3

[0024] Example 3: Dissolve 6.0 g of cobalt sulfate in twice-distilled water to form a 30% solution, add about 25 g of β-alumina with a high specific surface area, stir for 0.5 h to make it evenly mixed, and place the mixture in an ice-water bath Cool to about 0°C, slowly add 11.4g of 20% (weight percent) sodium borohydride alkaline aqueous solution, and form a cobalt boride precipitate through a chemical oxidation-reduction reaction, which is evenly dispersed on the surface of β-alumina. After the reaction is complete, The loaded catalyst powder was filtered and dried at 250° C. for 12 hours under an argon atmosphere to obtain the desired catalyst of the present invention. The loading of the resulting highly dispersed catalyst was about 5 wt%.

[0025] Similar catalysts can be obtained by replacing the transition metal salts, metal borohydrides, and catalyst supports in the above examples with other transition metal salts, metal borohydrides, and catalyst supports described in...

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Abstract

The present invention relates to a method for preparing hydrogen gas, which is characterized by that the aqueous solution or alkaline aqueous solution of metal boron hydride is contacted with transition metal boride catalyst deposited on the porous carrier material by means of chemical deposition method to make boron hydride produce hydrolysis reaction and release out hydrogen gas. Said inventionalso provides the equipment for implement said method, said equipment includes reaction liquor container, catalytic reaction tube communicated with reaction liquor container and gas storage tube communicated with catalyst reaction tube, and the catalytic reaction tube interior is filled with the transition metal boride catalyst deposited on porous carrier material by means of chemical deposition method.

Description

technical field [0001] The invention relates to a hydrogen preparation method and device. It belongs to the technical field of electrochemistry, energy chemistry and chemical power products. Background technique [0002] Hydrogen-oxygen (air) fuel cell is a clean and efficient power generation device with high specific energy, long cycle life and no pollution. It is an ideal supporting power source for many advanced mobile electronic products and electric vehicles. At present, the technology of hydrogen-oxygen (air) fuel cell is quite mature, but one of the main reasons hindering its wide application is the lack of efficient hydrogen source. Over the years, people have used technologies such as hydrogen storage alloy hydrogen storage, carbon nanotube hydrogen storage, organic matter catalysis or chemical cracking hydrogen production to build mobile hydrogen generators, but these methods and technologies require harsh hydrogen absorption and desorption conditions or low hydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/02B01J31/00B01J35/10
Inventor 杨汉西董华艾新平
Owner WUHAN UNIV
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