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Application of metal nitrogen-based hydrogen storage material in hydrogen isotope separation and preparation method of metal nitride

A technology for hydrogen isotopes and hydrogen storage materials, applied in the separation of different isotopic elements, separation methods, nitrogen-metal/silicon/boron binary compounds, etc.

Pending Publication Date: 2022-06-14
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are very few general-purpose methods for synthesizing nitrides. Industrial nitrides are mainly obtained by reacting simple metals or anhydrous metal halides directly with nitrogen or ammonia to prepare nitrides at high temperatures (>1273K).

Method used

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  • Application of metal nitrogen-based hydrogen storage material in hydrogen isotope separation and preparation method of metal nitride
  • Application of metal nitrogen-based hydrogen storage material in hydrogen isotope separation and preparation method of metal nitride
  • Application of metal nitrogen-based hydrogen storage material in hydrogen isotope separation and preparation method of metal nitride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Weigh 2g Li rods with a purity of 99.8% in a glove box protected by an inert gas, put them into a ball mill jar, and fill the jar with high-purity nitrogen gas of 10MPa. , the speed is 400 rpm. After the ball milling, the high-purity nitrogen gas was slowly filled into the ball mill tank at room temperature to 10MPa, and the nitrogen gas was repeatedly filled until the pressure in the ball mill tank no longer decreased, and the reaction was carried out for a total of 40h to obtain brown Li. 3 N powder.

[0068] figure 1 is the obtained Li 3 XRD pattern of N sample, it can be seen that the reaction product is completely Li 3 N, no impurity phase is formed.

Embodiment 2

[0070] In an inert gas protection glove box, weigh 2g of LiAl alloy block with a purity of 98% and put it into a ball mill jar, and fill the jar with high-purity nitrogen gas of 10MPa. The ratio of ball to material is 60:1. hour at 400 rpm. After the ball milling, the ball mill tank was slowly filled with high-purity nitrogen to 10MPa at room temperature, and nitrogen was repeatedly filled until the pressure in the ball mill tank no longer decreased, and the reaction was carried out for a total of 60h to obtain gray-brown Li. 3 Mixed powder of N and AlN.

Embodiment 3

[0072] Weigh 0.14 g of Li in an inert gas protected glove box 3 N was loaded into the reactor, the reactor was evacuated and heated to 473K, and kept for 0.5 hours; by controlling the input gas pressure 0.2MPa, 0.0042mol of hydrogen isotope mixed gas (n D : n H = 1.8), after the adsorption is balanced (the pressure is no longer reduced), record the current pressure value, use the mass spectrometer to test the gas composition in the current reactor, and combine the total amount of hydrogen-deuterium mixture adsorbed by the solid material to obtain the hydrogen in the current material. Deuterium content molar ratio, recorded as [D] / [H]) solid ; The temperature of the reactor is quickly reduced to 293K, and the reactor is quickly evacuated to remove the gas mixture in the reactor that is not adsorbed; After the mixed gas in the reactor is completely evacuated, the reactor is slowly heated to make it warm to 473K And keep the temperature for 1 hour, thermally remove the mixture ...

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Abstract

The invention discloses application of a metal nitrogen-based hydrogen storage material in hydrogen isotope separation or enrichment and a preparation method of metal nitride. According to the application of the metal nitrogen-based hydrogen storage material in separation or enrichment of hydrogen isotopes, a gas mixture containing the hydrogen isotopes and the metal nitrogen-based hydrogen storage material are contacted and treated, so that the hydrogen isotopes are separated or enriched; the metal nitrogen-based hydrogen storage material comprises at least one of a metal nitride, a metal imino compound and a metal amino compound. The metal nitrogen-based hydrogen storage material provided by the invention has relatively good hydrogen isotope separation efficiency, and T2, D2 and H2 in hydrogen isotopes can be purified and separated or enriched and stored. The preparation method of the metal nitride is a mechanical ball milling method, is simple and low in energy consumption, can be used for large-scale synthesis, and can be used for preparing the high-purity powdery metal nitride without high temperature and high pressure.

Description

technical field [0001] The application relates to an application of a metal nitrogen-based hydrogen storage material in the separation or enrichment of hydrogen isotopes and a preparation method of metal nitride, belonging to the fields of nuclear energy utilization technology, material preparation technology and hydrogen storage technology. Background technique [0002] Controlled nuclear fusion releases energy by polymerizing deuterium and tritium to form helium, which has the advantages of high energy release and environmental friendliness, and is considered to be the ultimate solution to human energy problems. The separation of hydrogen isotopes in nuclear fusion systems is an essential process, because deuterium and tritium are the main nuclear fuels for nuclear fusion reactions, and hydrogen isotopes in nature are mostly H 1 (Protium, H) exists, H 2 (Deuterium, D) about 0.015%, H 3 (Tritium, T) is almost negligible. Therefore, how to efficiently separate hydrogen iso...

Claims

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Application Information

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IPC IPC(8): B01D59/00C01B21/06C01B21/072
CPCB01D59/00C01B21/0607C01B21/0612C01B21/061C01B21/0722C01P2002/72C01P2004/80
Inventor 曹湖军张钊陈萍
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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