Light gas-solid hydrogen storage material and preparation method thereof

A hydrogen storage material, gas-solid technology, applied in the production of hydrogen and other directions, can solve problems such as insignificant effects, and achieve the effects of eliminating powder agglomeration on the wall, fast hydrogen release, and reducing hydrogen release temperature.

Inactive Publication Date: 2012-11-14
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above three methods can improve the hydrogen absorption and desorption ki

Method used

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  • Light gas-solid hydrogen storage material and preparation method thereof
  • Light gas-solid hydrogen storage material and preparation method thereof
  • Light gas-solid hydrogen storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of light gas-solid hydrogen storage material, the steps are as follows:

[0021] 1) Under the protection of argon atmosphere, the equimolar ratio of Li 3 N and LiNH 2 Put it in a ball mill jar, mix evenly and add TPP with a mass percentage of 20%;

[0022] 2) Under the protection of argon atmosphere, ball milling for 10 hours under the conditions of ball-to-material ratio of 60:1 and rotation speed of 400 rpm, the composition of Li 3 N-LiNH 2 Lightweight gas-solid hydrogen storage material with +20wt.%TPP.

[0023] figure 1 Li before and after adding 20wt.%TPP 3 N-LiNH 2 X-ray diffraction (XRD) pattern of the sample after ball milling for 10 h. It can be seen from the figure that the diffraction peak positions before and after the addition of TPP are the same, both determined by Li 3 N and LiNH 2 phase composition, no other phases are formed. However, the diffraction peaks after adding TPP are more broadened, indicating that TPP has not be...

Embodiment 2

[0029] A preparation method of light gas-solid hydrogen storage material, the steps are as follows:

[0030] 1) Under the protection of argon atmosphere, the equimolar ratio of Li 3 N and LiNH 2 Put it in a ball mill jar, mix evenly and add TPP with a mass percentage of 25%;

[0031] 2) Under the protection of argon atmosphere, ball milling for 40h under the conditions of ball-to-material ratio of 30:1 and rotation speed of 200 rpm, the composition of Li 3 N-LiNH 2 Lightweight gas-solid hydrogen storage material with +25wt.% TPP.

[0032] The obtained sample carries out XRD test, and its result is consistent with figure 1 resemblance. Li 3 N-LiNH 2 +25wt.%TPP material only consists of Li 3 N and LiNH 2 phase composition, and the diffraction peaks are wider, indicating that TPP acts as a lubricant and dispersant, making the sample ball milled more fully and uniformly, and the crystal grains of the sample become smaller. TPD curve shape and embodiment 1 figure 2 rese...

Embodiment 3

[0034] A preparation method of light gas-solid hydrogen storage material, the steps are as follows:

[0035] 1) Under the protection of argon atmosphere, the equimolar ratio of Li 3 N and LiNH 2 Put it in a ball mill jar, mix evenly and add TPP with a mass percentage of 5%;

[0036] 2) Under the protection of argon atmosphere, ball milling for 50 hours under the conditions of ball-material ratio of 10:1 and rotation speed of 450 rpm, the composition of Li 3 N-LiNH 2 Lightweight gas-solid hydrogen storage material with +5wt.%TPP.

[0037] The obtained sample carries out XRD test, and its result is consistent with figure 1 resemblance. Li 3 N-LiNH 2 +5wt.%TPP material only consists of Li 3 N and LiNH 2 phase composition, and the diffraction peaks are wider, indicating that TPP acts as a lubricant and dispersant, making the sample ball milled more fully and uniformly, and the crystal grains of the sample become smaller. TPD curve shape and embodiment 1 figure 2 resemb...

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Abstract

The invention relates to a light gas-solid hydrogen storage material. The light gas-solid hydrogen storage material consists of a Li-N-H composite hydrogen storage material and triphenyl phosphite, wherein the Li-N-H composite hydrogen storage material is an active material, and consists of lithium nitride (Li3N) and lithium amide (LiNH2), and triphenyl phosphate is a non-active material. The preparation method comprises the following steps of: mixing the Li3N and the LiNH2 with equal molar ratio under the argon shield, adding triphenyl phosphate, and carrying out ball milling for 2-50h with the ratio of grinding media to material being (10-60):1 and the rotating speed of 100-450 turns/min. The invention has the advantages that the phenomena of wall attachment and agglomeration of powder in the ball milling process are eliminated due to the addition of triphenyl phosphite, the hydrogen discharge temperature of the Li-N-H material is lowered, the Li-N-H material is effectively prevented from being sintered in the cyclic process of absorbing and discharging hydrogen, the hydrogen discharge dynamic performance and cyclic stability are improved, and hydrogen can be stored and transported safely and efficiently. The preparation method is simple and easy to implement.

Description

technical field [0001] The invention relates to a hydrogen storage material and a preparation method thereof, in particular to a light gas-solid hydrogen storage material and a preparation method thereof. Background technique [0002] Hydrogen energy has the advantages of abundant resources, no pollution, and renewable, and is one of the ideal green energy sources. At present, many countries in the world are stepping up the deployment and implementation of hydrogen energy strategies, such as the "Future Gen" plan in the United States, the "Framework" plan in Europe, and the "New Sunshine" plan in Japan. However, as a new energy source, hydrogen energy has not been commercialized so far, and the fundamental constraints lie in the unresolved issues of hydrogen safety, large-scale storage and transportation. Therefore, the development of hydrogen storage materials with high hydrogen storage capacity and good safety has always been one of the key technologies to realize their a...

Claims

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Application Information

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IPC IPC(8): C01B3/02
Inventor 杨化滨肖琪陈志
Owner NANKAI UNIV
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