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High-performance lithium borohydride-magnesium hydride reversible hydrogen production system and method

A technology of lithium borohydride and magnesium hydride, applied in high-performance lithium borohydride-magnesium hydride reversible hydrogen production system and hydrogen production, lithium borohydride-magnesium hydride and TiCl3/h-BN high-performance hydrogen production system and hydrogen production field , can solve the problems of unsatisfactory reversible hydrogen desorption performance and high hydrogen desorption temperature, and achieve the effect of low requirements, simple raw materials and high-quality hydrogen storage density

Active Publication Date: 2017-03-15
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above advantages determine that it can be used in vehicle-mounted fuel vehicles. Scholars from various countries have made some progress through the research on this system. However, to realize the practical application of lithium borohydride-magnesium hydride composite system hydrogen production technology, the following problems are still difficult to solve: (1) The dehydrogenation process is divided into two steps, with a longer incubation period; (2) The dehydrogenation temperature is higher; (3) The reversible dehydrogenation performance is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In this example, lithium borohydride-magnesium hydride and TiCl with a particle size of 10 μm were first prepared by ball milling. 3 / h-BN two solid powders, the two solid powders are made into a hydrogen production system at a weight ratio of 5:1 and then fully mixed by ball milling. After the two powders are mixed evenly, they are placed in a closed reactor. Heating to 380°C produces hydrogen, and starts hydrogen desorption at a hydrogen pressure of 0.3 MPa, and the dehydrogenation product is LiH / MgB 2 / H 2 , and at 350°C, 10MPaH 2 In the case of hydrogen absorption and recycling, the hydrogen release reaction is as follows: 2LiBH 4 +MgH 2 →2LiH+MgB 2 +4H 2 .

Embodiment 2

[0025] In this example, lithium borohydride-magnesium hydride and TiCl with a particle size of 200 nm were first prepared by melting method or wet chemical method. 3 / h-BN two solid powders, and the two solid powders are made into a hydrogen production system at a weight ratio of 5:1 and then fully mixed by ball milling. After the two powders are mixed evenly, they are placed in a closed reactor. Heating to 320°C under low temperature to produce hydrogen, and starting hydrogen desorption at a hydrogen pressure of 0.3 MPa, and the dehydrogenation product is LiH / MgB 2 / H 2 , and at 350°C, 10MPa H 2 In the case of hydrogen absorption and recycling, the hydrogen release reaction is as follows: 2LiBH 4 +MgH 2 →2LiH+MgB 2 +4H 2 .

Embodiment 3

[0027] In this example, lithium borohydride-magnesium hydride, TiCl and 3 / h-BN two solid powders, and the two solid powders are made into a hydrogen production system at a weight ratio of 1:0.2 and are fully mixed by ball milling, placed in a closed reactor, and heated to 400 ° C without a catalyst. Hydrogen, hydrogen desorption starts at a hydrogen pressure of 0.3MPa, and the dehydrogenation product is LiH / MgB 2 / H 2 , and at 350°C, 10MPaH 2 In the case of hydrogen absorption and recycling, the hydrogen release reaction is as follows: 2LiBH 4 +MgH 2 →2LiH+MgB 2 +4H 2 .

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Abstract

The invention belongs to the technical field of hydrogen storage and hydrogen production, and relates to a high-performance lithium borohydride-magnesium hydride reversible hydrogen production system and method. The hydrogen production method comprises the following steps of firstly, respectively preparing lithium borohydride-magnesium hydride and TiCl3 / h-BN into powder; then, uniformly mixing lithium borohydride-magnesium hydride powder with TiCl3 / h-BN powder at a weight ratio of 5:1, placing the mixture in a closed reactor made of a stainless steel material; and heating to 300-400 DEG C without action of a catalyst for producing hydrogen. The hydrogen production system and method have the advantages that the raw materials are simple and easily available, the process is simple, products are free of pollution, operation is simple and convenient, the portability is high, the requirement on hydrogen production device is low, the reliability is high, and a stable mobile hydrogen source can be provided for a plurality of military and civil mobile and portable equipment.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of hydrogen storage and hydrogen production, and relates to a high-performance lithium borohydride-magnesium hydride reversible hydrogen production system and a hydrogen production method, in particular to a lithium borohydride-magnesium hydride and TiCl 3 / h-BN high-performance hydrogen production system and hydrogen production method. [0003] Background technique: [0004] As a renewable and clean secondary energy source, hydrogen has many advantages. However, it is difficult to achieve large-scale commercial application due to the limitation of technical bottlenecks in preparation / storage. Compared with high-pressure hydrogen cylinders and cryogenic liquid hydrogen, material-based solid-state hydrogen storage has significant advantages in terms of operational safety, energy efficiency, and theoretical hydrogen storage density, and is recognized as the most promising hydrogen storage method. Solid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/04C01B3/00C01B3/06
CPCC01B3/001C01B3/04C01B3/065C01B2203/0255C01B2203/0272Y02E60/32Y02E60/36
Inventor 王葵葵吴广磊李洪亮赵修松
Owner QINGDAO UNIV
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