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Preparation method of composite hydride hydrogen storage material and composite hydride hydrogen storage material

A hydrogen storage material and hydride technology, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve problems such as kinetic obstacles, and achieve the effect of simple process and strong safety and operability

Inactive Publication Date: 2018-04-17
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

However, due to its great kinetic hindrance, Mg(NH 2 ) 2 The dehydrogenation starting temperature of -2LiH system is as high as about 120°C, and the rapid absorption and release of 5.4wt% hydrogen can only be carried out in the range of 180°C, so how to reduce the hydrogen absorption and dehydrogenation temperature to achieve its hydrogen absorption and dehydrogenation below 100°C , to become Mg(NH 2 ) 2 Research focus on practical application of -2LiH system

Method used

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  • Preparation method of composite hydride hydrogen storage material and composite hydride hydrogen storage material
  • Preparation method of composite hydride hydrogen storage material and composite hydride hydrogen storage material
  • Preparation method of composite hydride hydrogen storage material and composite hydride hydrogen storage material

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Effect test

Embodiment 1

[0041] Embodiment 1: prepare Li-Mg-N-H (xMg (NH 2 ) 2 -yLiH) system

[0042] (1) Take a certain amount of magnesium amide and a corresponding amount of lithium hydride (such as 2Mg(NH 2 ) 2 -3LiH system, the molar ratio of Mg and Li is 2:3), and then added to the ball mill jar, followed by injection of argon.

[0043] (2) After adding magnesium amide, lithium hydride and argon as described in step (1), place the ball mill jar on a planetary ball mill at 50-200 rpm to mix evenly, and the ball milling time is 24h-36h.

[0044] (3) The sample obtained after mixing uniformly as in step (2) was subjected to a temperature programmed deammonization test (TPD-MS) to determine its dehydrogenation temperature, and an appropriate temperature was selected for dehydrogenation.

[0045] (4) Take out the sample mixed in step (2) and place it in a pressure-resistant reactor for dehydrogenation reaction, and the dehydrogenation temperature is between 20 and 150°C;

[0046] (5) As in step ...

Embodiment 2

[0048] Embodiment 2: Preparation of LiBH 4 Modified Li-Mg-N-H(xMg(NH 2 ) 2 -yLiH-zLiBH 4 )system

[0049] (1) Take a certain amount of magnesium amide and a corresponding amount of lithium hydride and lithium borohydride (such as 2Mg(NH 2 ) 2 -3LiH-4LiBH 4 The system is Mg(NH 2 ) 2 , LiH and LiBH 4 The molar ratio is 2:3:4), and then added to the ball mill jar, followed by injection of argon.

[0050] (2) After adding magnesium amide and the corresponding amount of lithium hydride and lithium borohydride as described in step (1), place the ball mill jar on a planetary ball mill at 50-200rpm and mix evenly, so that the three main materials and additives can be fully mixed well mixed.

[0051] (3) The sample obtained after mixing uniformly as in step (2) was subjected to a temperature programmed deammonization test (TPD-MS) to determine its dehydrogenation temperature, and an appropriate temperature was selected for dehydrogenation.

[0052] (4) Take out the sample mi...

Embodiment 3

[0055] Embodiment 3: prepare KH modified Li-Mg-N-H(xMg(NH 2 ) 2 -yLiH-zKH) system

[0056] (1) Take a certain amount of magnesium amide and corresponding amount of lithium hydride and potassium hydride (such as Mg(NH 2 ) 2 -1.9LiH-0.1KH system, Mg(NH 2 ) 2 , LiH and KH in a molar ratio of 1:1.9:0.1), and then added to the ball mill jar, followed by injection of argon.

[0057] (2) After adding magnesium amide and the corresponding amount of lithium hydride and potassium hydride as described in step (1), place the ball mill jar on a planetary ball mill at 50-200rpm and mix evenly, so that the three main materials and additives can be fully mixed uniform.

[0058] (3) The sample obtained after mixing uniformly as in step (2) was subjected to a temperature programmed deammonization test (TPD-MS) to determine its dehydrogenation temperature, and an appropriate temperature was selected for dehydrogenation.

[0059] (4) Take out the sample mixed in step (2) and place it in a ...

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Abstract

The invention belongs to the field of hydrogen storage materials and particularly relates to a preparation method of a composite hydride hydrogen storage material and the composite hydride hydrogen storage material. According to the method, a metallic amino compound and / or a metal imino compound and metal hydride are taken as main materials, an aid is added, the raw materials are mixed uniformly in the reaction atmosphere, and the composite hydride hydrogen storage material is obtained through steps including dehydrogenation and hydrogenation. The composite hydride hydrogen storage material asa novel reversible hydrogen storage material has good hydrogen absorption and dehydrogenation properties in testing of the hydrogen storage property and has very important guide value for civilian use and practical use of the hydrogen storage system.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage, and in particular relates to a preparation method of a composite hydride hydrogen storage material and a composite hydride hydrogen storage material. The composite hydride hydrogen storage material can perform reversible absorption and discharge in a low temperature range (less than 100°C). hydrogen. Background technique [0002] Due to the increasing depletion of traditional fossil energy such as coal, oil, and natural gas, as well as the environmental pollution caused by combustion, people are forced to actively seek new renewable green energy that can replace traditional energy, such as: wind energy, solar energy, biomass, hydrogen, etc. can wait. Among them, hydrogen energy has a high combustion calorific value (142MJ·kg) due to its abundant reserves in the universe. -1 ), which is about 3 times that of gasoline, 3.9 times that of alcohol, and 4.5 times that of coke, and the combus...

Claims

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Application Information

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IPC IPC(8): C01B3/00
CPCC01B3/0078Y02E60/32
Inventor 陈萍王涵
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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