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Method for generating hydrogen by hydrolyzing lithium borohydride and reacting device used for method

A lithium borohydride and reaction device technology, which is applied in the field of hydrogen source use of micro fuel cells, can solve problems such as slow reaction, reduce the hydrogen release rate, meet the output of low rate and high capacity, and promote the practical process.

Active Publication Date: 2013-03-20
NINGBO SHENJIANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used chemical reagent for stabilizing borohydride is NaOH, however in NaOH solution LiBH 4 Still unstable, Kreevoy and other studies believe that borohydride has a half-life in a strong alkaline solution and will react slowly

Method used

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  • Method for generating hydrogen by hydrolyzing lithium borohydride and reacting device used for method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The reaction device used in this example is as figure 1 As shown, it includes a liquid water storage chamber 1, a water inlet capillary tube 2, a hydrolysis reaction chamber 3, a gas feedback pipeline 5, and an interface 4 opposite to the fuel cell. One end of the water inlet capillary tube 2 is in communication with the liquid water storage chamber 1 The other end is placed in the hydrolysis reaction chamber 3, one end of the gas feedback pipe 5 is inserted into the liquid water in the liquid water storage chamber 1, and the other end is in communication with the hydrolysis reaction chamber 3. The diameter of the water inlet capillary 2 is 5-30 μm.

[0026] 1g LiBH 4 Mix with 23 mL of ether solvent, that is, place it in the hydrolysis reaction chamber 3 of the reaction device according to the ratio of the saturated solution, and mechanically stir at 100 rpm until a uniform solution is formed. Then the reaction device is sealed and connected to the fuel cell through a micr...

Embodiment 2

[0028] The anyway device used in this embodiment is the same as that in embodiment 1.

[0029] 1g LiBH 4 Mix with 23 mL of ether solvent, that is, place it in the hydrolysis reaction chamber 3 of the reaction device according to the ratio of the saturated solution, and mechanically stir at 100 rpm until a homogeneous solution is formed, and then add 1 g of LiBH 4 For the solid powder, continue to stir for 2 hours, then seal the reaction device, communicate with the fuel cell, and inject excess liquid water into the liquid water storage chamber 1 through a micro pump. The liquid water drops into the hydrolysis reaction chamber 3 to react with the supernatant (saturated solution) of the supersaturated solution, and the resulting reaction product is deposited on the bottom of the reactor, and the consumed LiBH 4 LiBH at the bottom 4 The dissolved solids are constantly replenished. The rate of hydrogen produced by the system is 72mLmin -1 g -1 , Eventually LiBH 4 The hydrogen in it is...

Embodiment 3

[0031] The anyway device used in this embodiment is the same as that in embodiment 1.

[0032] 1g LiBH 4 Mix with 23 mL of ether solvent, that is, place it in the hydrolysis reaction chamber 3 of the reaction device according to the ratio of the saturated solution, and mechanically stir at 100 rpm until a uniform solution is formed, and then add 3 grams of LiBH 4 For the solid powder, continue to stir for 2 hours, then seal the reaction device, communicate with the fuel cell, and inject excess liquid water into the liquid water storage chamber 1 through a micro pump. The liquid water drops into the hydrolysis reaction chamber 3 to react with the supernatant (saturated solution) of the supersaturated solution, and the resulting reaction product is deposited on the bottom of the reactor, and the consumed LiBH 4 LiBH at the bottom 4 The dissolved solids are constantly replenished. The rate of hydrogen produced by the system is 160 mLmin -1 g -1 , Eventually LiBH 4 The hydrogen in it ...

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Abstract

The invention discloses a method for generating hydrogen by hydrolyzing lithium borohydride and a device used for the method. The method comprises the following steps of: dissolving lithium borohydride in an organic solvent which can not be adsorbed on a proton exchange membrane or a fuel cell membrane to obtain an organic saturated solution or an organic suspension, and filling liquid water to regulate the concentration of lithium borohydride so as to realize the regulation of the speed of releasing hydrogen in reaction until the content of theoretical hydrogen in lithium borohydride is completely released finally. The device comprises a liquid water storage room (1), a water feeding capillary (2), a hydrolysis reaction room (3), a gas feedback pipeline (5) and a port (4) which is butted with the fuel cell, wherein one end of the water feeding capillary (2) is communicated with the liquid water storage room (1), and the other end of the water feeding capillary (2) is arranged in the hydrolysis reaction room (3); and one end of the gas feedback pipeline (5) is inserted in the liquid water of the liquid water storage room (1), and the other end of the water feeding capillary (2) is communicated with the hydrolysis reaction room (3). The method is high in hydrogen release efficiency and stable and controllable in hydrogen release process.

Description

Technical field [0001] The invention relates to the technical field of the use of hydrogen sources for micro fuel cells, in particular to a method for generating hydrogen by hydrolysis of lithium borohydride, and a reaction device used in the method. Background technique [0002] In recent years, the state has put forward a strategic development plan for the active development and utilization of new energy, and has increased financial and policy support for the new energy field, aimed at reducing greenhouse gas emissions, solving environmental problems, and responding to energy crises, achieving economic and ecological Overall planning and coordinated development. One of the core technologies in the field of new energy: fuel cell technology has thus developed rapidly. Fuel cells can be used not only as large power sources, but also as small portable power sources, such as laptop computers, mobile communications, and so on. However, the biggest obstacle to the application of fue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/06
CPCY02E60/36
Inventor 翁百成蒲朝辉李志林蒋乾勇朱云浩吴铸
Owner NINGBO SHENJIANG TECH
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