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Solid hydrogen storage material and preparation method thereof

A hydrogen storage material and solid-state technology, applied in the production of hydrogen and other directions, can solve the problems of poor hydrogen absorption and desorption kinetics, high hydrogen reabsorption temperature, and low dehydrogenation efficiency, and achieve fast hydrogen absorption and desorption. The effect of mild conditions and large reversible hydrogen storage capacity

Inactive Publication Date: 2013-06-12
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such materials have poor hydrogen absorption and desorption kinetics at low temperatures, high hydrogen reabsorption temperature, and poor reversibility.
Compared with traditional hydrogen storage methods, organic liquid hydrogen storage has more obvious advantages in hydrogen storage performance, such as hydrogen storage capacity, hydrogen storage efficiency, storage and transportation, and cycle life. However, according to the results reported so far, this The dehydrogenation efficiency of the material is still very low
Different from the above materials are carbon-based materials and MOF materials. Their hydrogen storage method belongs to physical adsorption storage materials. These materials have been developed rapidly due to their advantages of safe hydrogen storage and high hydrogen storage efficiency. The main disadvantages currently exist The hydrogen absorption temperature is relatively low, and its hydrogen absorption is very small at room temperature
Although there are various types of hydrogen storage materials currently being studied, each with its own advantages, according to the U.S. Department of Energy (DOE), the hydrogen storage capacity is ≥6.5wt%, the decomposition temperature is 60-120°C, low cost and low toxicity. goals, so far, no system can meet all the requirements

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  • Solid hydrogen storage material and preparation method thereof

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Effect test

Embodiment 1

[0019] A preparation method of a novel solid hydrogen storage material, the steps are as follows:

[0020] 1) will Co 3 B and Y 2 o 3 Stir and mix in a mortar at a mass ratio of 1:1 to obtain a mixed catalyst; 2) prepare an aqueous NaOH solution with a pH value of 12, and then mix NaBH 4 (Sodium borohydride) dissolved in NaOH aqueous solution to get NaBH 4 Alkaline aqueous solution, NaBH 4 NaBH in alkaline aqueous solution 4 The mass fraction is 9%, NaBH 4 NaBH in alkaline aqueous solution 4 content of NaBH 4 50% of the total mass of the mixed catalyst (i.e. NaBH 4 NaBH contained in alkaline aqueous solution 4 The mass ratio to the mixed catalyst is 1:1); 3) Mix the mixed catalyst with NaBH 4 After mixing the alkaline aqueous solution, carry out a hydrolysis reaction at 30°C for 30 minutes to obtain a hydrolyzate, and filter the hydrolyzate and dry it at 25°C for 12 hours to obtain a solid hydrogen storage material.

[0021] From figure 1 It can be seen that the re...

Embodiment 2

[0025] 1) will Co 3 B and Y 2 o 3 Stir and mix in a mortar at a mass ratio of 1:1.5 to obtain a mixed catalyst; 2) prepare an aqueous NaOH solution with a pH value of 12.5, and then mix NaBH 4 Dissolve in NaOH aqueous solution to get NaBH 4 Alkaline aqueous solution, NaBH 4 NaBH in alkaline aqueous solution 4 The mass fraction is 9%, NaBH 4 NaBH in alkaline aqueous solution 4 content of NaBH 4 55% of the total mass of the mixed catalyst; 3) mix the mixed catalyst with NaBH 4 After mixing the alkaline aqueous solution, carry out a hydrolysis reaction at 30°C for 20 minutes to obtain a hydrolyzate, and filter the hydrolyzate and dry it at 25°C for 16 hours to obtain a solid hydrogen storage material.

[0026] After XRD analysis of the solid hydrogen storage material, the phase composition and figure 2 same, among them, Co 3 B-Y 2 o 3 Accounting for NaBO 2 -Co 3 B-Y 2 o 3 32% of the mass. And the microstructure of the material did not change significantly after ...

Embodiment 3

[0028] 1) will Co 3 B and Y 2 o 3 Stir and mix in a mortar at a mass ratio of 1:0.5 to obtain a mixed catalyst; 2) prepare an aqueous NaOH solution with a pH value of 13, and then mix NaBH 4Dissolve in NaOH aqueous solution to get NaBH 4 Alkaline aqueous solution, NaBH 4 NaBH in alkaline aqueous solution 4 The mass fraction is 9%, NaBH 4 NaBH in alkaline aqueous solution 4 content of NaBH 4 58% of the total mass of the mixed catalyst; 3) Mix the mixed catalyst with NaBH 4 After mixing the alkaline aqueous solution, carry out a hydrolysis reaction at 25° C. for 15 minutes to obtain a hydrolyzate, and filter the hydrolyzate and dry it at 25° C. for 20 hours to obtain a solid hydrogen storage material.

[0029] After XRD analysis of the solid hydrogen storage material, the phase composition and figure 2 same, among them, Co 3 B-Y 2 o 3 Accounting for NaBO 2 -Co 3 B-Y 2 o 3 30% of the mass. And the microstructure of the material did not change significantly after...

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Abstract

The invention provides a solid hydrogen storage material and a preparation method thereof. The preparation method comprises the following steps: 1) mixing Co3B and rare earth oxide according to the Co3B:rare earth oxide mass ratio of 1:(0.5-1.5) to obtain a mixed catalyst; and 2) mixing the mixed catalyst and an NaBH4 alkaline water solution, hydrolyzing at 25-30 DEG C to carry out hydrogen desorption reaction for 10-30 minutes to obtain a hydrolysate, filtering the hydrolysate, and drying at room temperature for 12-24 hours to obtain an NaBO2-Co3B-rare earth oxide system which is the solid hydrogen storage material. The preparation method has the advantages of simple apparatuses and simple technical process, and is easy to control; the material is a sodium borohydride hydrolysate, and thus, is low in cost; and the prepared solid hydrogen storage material has the advantages of hydrogen storage reversibility, large hydrogen storage quantity, mild conditions for hydrogen absorption and desorption, and high hydrogen absorption speed, and is suitable for efficient and safe storage and transportation of hydrogen.

Description

technical field [0001] The invention belongs to the field of hydrogen storage materials, and in particular relates to a novel hydrogen storage material and a preparation method thereof. Background technique [0002] Hydrogen energy is regarded as the clean energy with the most development potential in the 21st century. However, due to the lack of convenient and effective hydrogen storage materials and hydrogen storage technology, the application of hydrogen energy has been greatly hindered for a long time. The hydrogen storage materials currently studied mainly include hydrogen storage alloys, coordination hydrides, amino compounds, organic liquids, carbon-based materials, and metal-organic frameworks (MOFs). Compared with hydrogen storage alloys, complex hydrides have higher hydrogen storage capacity, for example, LiBH 4 The hydrogen storage capacity is 18%, which is far beyond the hydrogen storage alloy such as AB 5 、AB 2 、A 2 The hydrogen storage capacity of B and V-b...

Claims

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Application Information

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IPC IPC(8): C01B3/06
CPCY02E60/36
Inventor 郑雪萍刘胜林邓娟莉郑姣姣冯鑫肖果刘敏鲁卓睿
Owner CHANGAN UNIV