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Magnesium hydride-in-situ generated metal borohydride hydrolysis hydrogen production material and preparation method thereof

A metal borohydride, in-situ generation technology, applied in the directions of alkali metal/alkaline earth metal/beryllium/magnesium hydride, borane/diborane hydride, chemical instruments and methods, etc. Regeneration, high price of calcium hydride, difficult separation and regeneration of hydrolyzed products, etc., to avoid significant decline, increase specific surface area, and low price

Active Publication Date: 2022-05-06
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there is no problem that chlorides reduce the hydrogen release capacity of the system, the price of calcium hydride is relatively high, and the hydrolyzate is difficult to separate and regenerate
Hydrogenation after alloying is also an effective method to improve the hydrolysis performance of magnesium hydride, but the hydrolyzed products are complex and difficult to regenerate quickly

Method used

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  • Magnesium hydride-in-situ generated metal borohydride hydrolysis hydrogen production material and preparation method thereof
  • Magnesium hydride-in-situ generated metal borohydride hydrolysis hydrogen production material and preparation method thereof
  • Magnesium hydride-in-situ generated metal borohydride hydrolysis hydrogen production material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] In a glove box of 0.1MPa argon atmosphere, take magnesium hydride and 4mol% sodium metaborate, mix them and put them into a ball mill jar and place the ball mill jar in a vibration ball mill (QM-3C) with a ball-to-material ratio of 50 : 1, ball milling speed 1000r / min, ball milling directly under the argon atmosphere for 2h, to obtain the ball milling product. figure 1 Middle curve 2) is the FTIR spectrogram of this ball mill product, 2200-2425cm in the curve -1 and 1127cm -1 corresponding to the B-H bond stretching vibration in sodium borohydride ( figure 1 ν) and rocking vibration ( figure 1 The δ) absorption peak in , proves that sodium borohydride was successfully generated in situ. The prepared magnesium hydride-sodium borohydride hydrolysis hydrogen production material was hydrolyzed in pure water at 25°C to release hydrogen, and the hydrolysis performance was significantly improved compared with unmilled magnesium hydride, and 1298.9mL·g was released within 1h...

Embodiment 2

[0045] In a glove box of 0.1MPa argon atmosphere, take magnesium hydride and 4mol% sodium metaborate, mix them and put them into a ball mill jar and place the ball mill jar in a vibration ball mill (QM-3C) with a ball-to-material ratio of 50 : 1, ball milling speed 1000r / min, ball milling 4h directly under this argon atmosphere, obtains ball milling product. figure 1 Middle curve 3) is the FTIR spectrogram of this ball mill product, 2200-2425cm in the curve -1 and 1127cm -1 corresponding to the B-H bond stretching vibration in sodium borohydride ( figure 1 ν) and rocking vibration ( figure 1 The δ) absorption peak in , proves that sodium borohydride was successfully generated in situ. The prepared magnesium hydride-sodium borohydride hydrolysis hydrogen production material was hydrolyzed in pure water at 25°C to release hydrogen, and the hydrolysis performance was significantly improved compared with unmilled magnesium hydride, and the hydrolysis rate was extremely fast. Th...

Embodiment 3

[0047] In a glove box of 0.1MPa argon atmosphere, take magnesium hydride and 4mol% sodium metaborate, mix them and put them into a ball mill jar and place the ball mill jar in a vibration ball mill (QM-3C) with a ball-to-material ratio of 50 : 1, ball milling speed 1000r / min, ball milling directly under the argon atmosphere for 6h, to obtain a ball milling product. figure 1 Middle curve 4) is the FTIR spectrogram of this ball mill product, in the curve 2200-2425cm -1 and 1127cm -1 corresponding to the B-H bond stretching vibration in sodium borohydride ( figure 1 ν) and rocking vibration ( figure 1 The δ) absorption peak in , proves that sodium borohydride was successfully generated in situ. The prepared magnesium hydride-sodium borohydride hydrolysis hydrogen production material was hydrolyzed in pure water at 25°C to release hydrogen, and the hydrolysis performance was significantly improved compared with that of unmilled magnesium hydride, and the average hydrolysis rate...

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Abstract

The invention discloses a magnesium hydride-in-situ generated metal borohydride hydrolysis hydrogen production material and a preparation method thereof. The preparation method of the magnesium hydride-in-situ generated metal borohydride hydrolysis hydrogen production material comprises the following steps that magnesium hydride and a metaborate additive are mixed to obtain a mixture, the adding amount of metaborate is 1-8 mol%, the mixture is subjected to solid-phase ball milling treatment in a ball milling tank under the non-oxidizing atmosphere, and the magnesium hydride-in-situ generated metal borohydride hydrolysis hydrogen production material is obtained. The magnesium hydride-in-situ generated metal borohydride hydrolysis hydrogen production material is obtained. Lithium borohydride, sodium borohydride, potassium borohydride, magnesium borohydride and calcium borohydride which are high in price are avoided, and the directly-used metal metaborate is rich in source, low in price, low in toxicity, high in safety and suitable for mass production. In addition, the adding amount of the metal metaborate is small, and the hydrogen capacity of the system is prevented from being obviously reduced.

Description

Technical field: [0001] The invention belongs to the technical field of hydrolysis hydrogen production materials, and in particular relates to a magnesium hydride-in-situ generated metal borohydride hydrolysis hydrogen production material and a preparation method. Background technique: [0002] Hydrogen energy will play an important role in the path of carbon neutrality, but hydrogen energy storage and transportation technology is still a bottleneck in the large-scale application of hydrogen energy. Storing hydrogen in solid materials is one of the most promising methods to solve this bottleneck. However, the performance of existing reversible hydrogen storage materials still does not meet the requirements of practical applications. High-capacity light metal hydrides usually suffer from high thermodynamic stability and slow hydrogen absorption / desorption kinetics. Irreversible hydrogen storage materials can produce hydrogen under suitable conditions, and have high hydrogen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/06C01B6/21C01B6/04
CPCC01B3/065C01B6/21C01B6/04C01P2004/80Y02E60/36
Inventor 朱用洋曾黎明周建邦吴岱丰李睿曾炜炜唐仁衡周庆
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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