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Novel ammonia borane composite material for hydrolysis hydrogen production

A composite material, ammonia borane technology, applied in the field of new ammonia borane composite materials, can solve the problems of low hydrogen storage density, inability to fully release hydrogen, and fail to meet the application requirements of hydrogen storage, achieve high hydrogen storage capacity, improve Activation, the effect of maintaining the amount of hydrogen released

Inactive Publication Date: 2010-09-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can significantly increase the NH 3 BH 3 room temperature dehydrogenation kinetics, but due to the NH 3 BH 3 The solubility limit (concentration of 0.33wt% NH 3 BH 3 solution has the best hydrogen desorption kinetics), making its actual hydrogen storage density lower
The latter is the use of metal catalysts or metal atom substitution methods to increase the NH 3 BH 3 The chemical activity reduces the temperature of the thermal release of hydrogen, but the current minimum hydrogen release temperature is still above 70°C, and the hydrogen release cannot be completed
In summary, the current NH 3 BH 3 The research results of hydrogen desorption performance are still not up to the requirements of hydrogen storage applications. 3 BH 3 The utilization of new NH 3 BH 3 System research and modification technology to obtain excellent hydrogen desorption kinetics while maintaining high hydrogen storage capacity to meet practical applications

Method used

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  • Novel ammonia borane composite material for hydrolysis hydrogen production
  • Novel ammonia borane composite material for hydrolysis hydrogen production
  • Novel ammonia borane composite material for hydrolysis hydrogen production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] With LiH+NH 3 BH 3 As the starting material, the molar ratio was 1:1, and LiH / NH ​​was prepared by high-energy ball milling 3 BH 3 Complex.

[0019] Raw material: NH 3 BH 3 (purity 90%, 200 mesh), LiH (purity 95%, 200 mesh). LiH / NH ​​with a molar ratio of 1:1 was placed in a 0.1 MPa argon atmosphere glove box. 3 BH 3 The composite and stainless steel balls were put into a ball mill jar, sealed and then milled on a high-energy ball mill with a ball-to-material ratio of 30:1 and a milling time of 10 minutes.

[0020] The hydrolysis hydrogen release performance of the material was tested by the drainage gas collection method. figure 1 gives LiH / NH 3 BH 3 Kinetic performance curves of hydrolysis and hydrogen release of the composite at different temperatures. The higher the temperature, the greater the amount of hydrogen released. At 60°C, the final hydrogen released is 1800ml / g, which is about 16.1wt% (mass without water).

Embodiment 2

[0022] as CaH 2 +NH 3 BH 3 As the starting material, the molar ratio was 1:2, and CaH was prepared by high-energy ball milling 2 / 2NH 3 BH 3 Complex.

[0023] Raw material: NH 3 BH 3 (purity 90%, 200 mesh), CaH 2 (purity 95%, 200 mesh). The molar ratio of raw materials is 1:2, the ball milling time is 10 minutes, and the other sample preparation conditions are the same as in Example 1.

[0024] The hydrolysis hydrogen release performance of the material was tested by the drainage gas collection method. figure 2 for CaH 2 / 2NH 3 BH 3 Kinetic performance curves of hydrolysis and hydrogen release of the composite at different temperatures. 1450ml / g of hydrogen is released within 10 minutes at 60°C, which is about 12.9wt% (mass without water).

Embodiment 3

[0026] With NaCl+NH 3 BH 3 As the starting material, the molar ratio is 2:1, and the NaCl / NH 3 BH 3 Complex.

[0027] Raw material: NH 3 BH 3 (purity 90%, 200 mesh), NaCl (purity 99.9%, 200 mesh). The molar ratio of raw materials is 2:1, the ball milling time is 10 minutes, and the other sample preparation conditions are the same as in Example 1.

[0028] The hydrolysis hydrogen release performance of the material was tested by the drainage gas collection method. image 3 2NaCl / NH 3 BH 3 NH of the complex at different temperatures 3 BH 3 Hydrogen release performance curve. NH within 10 minutes at 60°C 3 BH 3 The generated hydrogen is about 1873.2ml / g, about 16.8wt% (mass excluding water and NaCl), and the hydrogen production rate is nearly 90%, which is significantly higher than that of pure AB under the same conditions (31.7%).

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Abstract

The invention relates to a novel ammonia borane composite material, in particular to the novel ammonia borane (NH3BH3) composite material used for inducing the hydrolysis of an ammonia borane compound to produce hydrogen under a mild condition. The novel ammonia borane composite material comprises hydrogen storage materials which have micron, submicron and nanometer particle sizes and are obtained by using an inducer (metal hydride MHx or a salt) and an ammonia borane mixture as initial raw materials. The metal hydride MHx comprises one of or a combination of a plurality of types of alkali metal hydride, alkaline earth metal hydride, transition metal hydride and rear earth metal hydride; and the salt comprises one of or a combination of a plurality of types of metal chloride and sulfate. The initiative phase component molar ratio of the inducer to the ammonia borane (NH3BH3) is (2-0.02):1. The novel ammonia borane composite material greatly improves the dynamics performance of hydrolysis hydrogen discharge of the ammonia borane, and has a high hydrogen discharge amount and a high hydrogen production rate when hydrolyzed under the mild condition.

Description

technical field [0001] The invention relates to a novel ammonia borane (NH 3 BH 3 ) composite material, including the type, proportion and preparation method of the inducer, belonging to the field of hydrogen storage materials. Background technique [0002] Hydrogen is considered to be the most ideal clean energy carrier to replace fossil energy in the 21st century. The scale of hydrogen involves technical links such as cheap hydrogen production, safe and efficient storage, transportation and utilization, among which hydrogen storage is one of the keys to the application of hydrogen energy. The current high-pressure hydrogen storage and low-temperature hydrogen storage are still bottlenecks in the widespread practical use of fuel cells in electric vehicles. The severe situation prompts more efforts to be invested in solid-state hydrogen storage materials such as metal hydrides, composite hydrides, and chemical hydrogen storage. The U.S. Department of Energy (DOE) has set...

Claims

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Application Information

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IPC IPC(8): C01B3/06
CPCY02E60/362Y02E60/36
Inventor 陈云贵吴朝玲李采临黄志芬
Owner SICHUAN UNIV
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