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MgH2-M-G mixture system material having high hydrogen desorption rate and method for improving MgH2 hydrogen desorption rate

A mixture, mgh2-m-g technology, applied in the production of hydrogen, alkali metal/alkaline earth metal/beryllium/magnesium hydride, etc., can solve problems such as poor thermal conductivity, and achieve high heating efficiency, fast heating rate, and hydrogen release rate. improved effect

Inactive Publication Date: 2016-11-09
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventive method is simple and easy, both overcomes the MgH 2 The problem of poor thermal conductivity improves the heating efficiency and promotes the MgH 2 Hydrogen desorption kinetics

Method used

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  • MgH2-M-G mixture system material having high hydrogen desorption rate and method for improving MgH2 hydrogen desorption rate
  • MgH2-M-G mixture system material having high hydrogen desorption rate and method for improving MgH2 hydrogen desorption rate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In this example, see figure 1 , an enhanced MgH 2 The method for hydrogen release rate has the following steps:

[0021] a.MgH 2 -TiO 2 - Raw material ingredients of G mixture system materials: titanium dioxide is used as a wave absorbing agent and catalyst, graphite is used as a microwave auxiliary heat agent, and MgH with a purity of 80wt.% is weighed according to the proportion 2 Powder 1g, titanium dioxide (TiO2) with a purity of 98 wt.% 2 ) powder 0.1 g, graphite (G) powder 0.02 g with a purity of 95 wt.% is used as a raw material component, that is, when the raw material is mixed, the content of titanium dioxide and graphite is calculated according to the molar percentage of the raw material component, and the content of titanium dioxide is the raw material 5.0mol% of the total molar number of various ingredients in the raw material, the content of graphite is 4.2mol% of the total molar number of the various ingredients in the raw material, in order to prevent...

Embodiment 2

[0027] This embodiment is basically the same as Embodiment 1, especially in that:

[0028] In this example, an improved MgH 2 The method for hydrogen release rate has the following steps:

[0029] a.MgH 2 -TiO 2 - Raw material ingredients of G mixture system materials: titanium dioxide is used as a wave absorbing agent and catalyst, graphite is used as a microwave auxiliary heat agent, and MgH with a purity of 80wt.% is weighed according to the proportion 2 Powder, titanium dioxide (TiO2) with a purity of 98 wt.% 2 ) powder and graphite (G) powder with a purity of 95 wt.% are used as raw material components, that is, when the raw materials are mixed, the content of titanium dioxide and graphite is calculated according to the molar percentage of the raw material components, and the content of titanium dioxide is the various ingredients in the raw materials. 5.0mol% of the total molarity of the components, and the content of graphite is 2.0mol% of the total molarity of the v...

Embodiment 3

[0035] This embodiment is basically the same as the previous embodiment, and the special features are:

[0036] In this example, an improved MgH 2 The method for hydrogen release rate has the following steps:

[0037] a.MgH 2 -TiO 2 - Raw material ingredients of G mixture system materials: titanium dioxide is used as a wave absorbing agent and catalyst, graphite is used as a microwave auxiliary heat agent, and MgH with a purity of 80wt.% is weighed according to the proportion 2 Powder, titanium dioxide (TiO2) with a purity of 98 wt.% 2 ) powder and graphite (G) powder with a purity of 95 wt.% are used as raw material components, that is, when the raw materials are mixed, the content of titanium dioxide and graphite is calculated according to the molar percentage of the raw material components, and the content of titanium dioxide is the various ingredients in the raw materials. 9.0mol% of the total molarity of the components, and the content of graphite is 2.0mol% of the to...

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Abstract

The invention discloses an MgH2-M-G mixture system material having the high hydrogen desorption rate and a method for improving the MgH2 hydrogen desorption rate. The method is a method of adding an oxide-type medium having the dual roles of wave absorption and catalysis under the effect of microwave radiation to improve the hydrogen desorption rate. The MgH2-M-G mixture system material is characterized in that an oxide M is adopted to serve as a wave absorbing agent and a catalyst simultaneously, the molar percentage content of the oxide M is 3-9%. G (graphite) serves as a microwave auxiliary heating agent, and the mole percentage content of the G (graphite) is 1-5%. After the ball milling method is adopted to conduct ball milling and mixing on MgH2, the oxide M and the G under the protection of inert gas, the material under the condition of microwave heating has the MgH2 hydrogen desorption rate 2-10 times higher than that under the common heating condition. The MgH2-M-G mixture system material has the advantages that the dual roles of wave absorption and catalysis of the oxide M are utilized to make the material have a better catalysis effect in a microwave field, and accordingly the hydrogen desorption rate of the MgH2 under the effect of microwave radiation is remarkably improved.

Description

technical field [0001] The invention relates to a hydrogen storage material and a hydrogen release method thereof, in particular to a Mg-based hydrogen storage material and a hydrogen release method thereof, which are applied in the field of hydrogen storage material preparation technology and application technology. Background technique [0002] Due to the advantages of high combustion calorific value, clean combustion products, and abundant resources, hydrogen energy has received more and more attention. In the process of hydrogen energy utilization, efficient and safe hydrogen storage technology has largely become a bottleneck restricting the application and development of hydrogen energy. The current hydrogen storage technology is mainly divided into three methods: solid hydrogen storage, liquid hydrogen storage and gaseous hydrogen storage. Among them, solid-state hydrogen storage materials have the advantages of large hydrogen storage capacity and high safety, and hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B6/04C01B3/02
CPCC01B6/04C01B3/02
Inventor 李谦任俊弛冷海燕尹杰周小龙周国治
Owner SHANGHAI UNIV