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Method for preparing hydrogen by reducing carbon dioxide by using alkali metal hydride

A technology of alkali metal hydride and carbon dioxide, applied in the field of clean energy, can solve problems such as unfavorable M-N-H system applications, and achieve the effect of simple reaction preparation equipment

Inactive Publication Date: 2017-12-01
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These factors are not conducive to the practical application of the M-N-H system

Method used

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  • Method for preparing hydrogen by reducing carbon dioxide by using alkali metal hydride
  • Method for preparing hydrogen by reducing carbon dioxide by using alkali metal hydride
  • Method for preparing hydrogen by reducing carbon dioxide by using alkali metal hydride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. In an argon glove box, place the NaH sample in a ball mill jar (with an internal volume of about 70 cm 3 ), put 30 small steel balls (diameter 6mm), take out the ball mill tank containing the NaH sample, pump out the argon gas and fill it with 0.25MPa high-purity CO 2 gas such that NaH / CO 2 The molar ratio is 4:1, using a planetary ball mill (QM-3SP4) at a speed of 450 rpm to perform ball milling reactions for 0.5h, 1h, and 2h respectively to obtain a mixed gas.

[0032] 2. After the reaction is over, the generated gas is passed into a vacuum pipeline system with a pressure sensor and connected to the chromatogram for GC detection. The product is characterized by the peak position, the peak area, and the pressure of the mixed gas after the reaction to calculate the hydrogen in the mixture. The mole fraction in the gas and the yield of hydrogen after the reaction.

Embodiment 2

[0034] 1. In an argon glove box, place the KH sample in a ball mill jar (with an internal volume of about 70 cm 3 ), put 30 small steel balls (diameter 6mm), take out the ball mill tank containing the KH sample, pump out the argon and fill it with 0.25MPa high-purity CO 2 gas such that KH / CO 2 The molar ratio is 4:1, using a planetary ball mill (QM-3SP4) at a speed of 450 rpm to perform ball milling reactions for 0.5h, 1h, and 2h respectively to obtain a mixed gas.

[0035] 2. After the reaction is over, the generated gas is passed into a vacuum pipeline system with a pressure sensor and connected to the chromatogram for GC detection. The product is characterized by the peak position, the peak area, and the pressure of the mixed gas after the reaction to calculate the hydrogen in the mixture. The mole fraction in the gas and the yield of hydrogen after the reaction.

[0036] Three, the yield calculation method of hydrogen in the mixed gas that each example obtains:

[0037]...

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Abstract

The invention relates to a method for preparing hydrogen by reducing carbon dioxide by using alkali metal hydride and belongs to the technical field of clean energy. The method comprises the steps of putting the alkali metal hydride into a ball mill tank in argon atmosphere; pumping argon in the ball mill tank and filling a high-purity CO2 gas; and carrying out ball mill reaction by adopting a ball mill at room temperature to prepare the hydrogen. The hydrogen is prepared by using the alkali metal hydride and CO2 at room temperature, and a novel approach is provided for preparation of the hydrogen free of NH3 and COx.

Description

technical field [0001] The invention belongs to the technical field of clean energy, and in particular relates to a method for preparing hydrogen by reducing carbon dioxide with alkali metal hydride under mechanical ball milling conditions at room temperature. Background technique [0002] With the continuous development of society and economy and the continuous increase of population, while the consumption of energy and energy in countries around the world continues to rise, the carbon dioxide emitted by the combustion of fossil fuels is also increasing day by day. Frequent occurrence of events and changes in phenological characteristics are changing the earth's ecosystem and threatening the survival and development of human beings. Carbon dioxide, on the other hand, is a safe, abundant, non-toxic and cheap raw material. If the seriously excessive CO in the air can be 2 Transforming into new energy and utilizing it not only solves the problem of the greenhouse effect, but...

Claims

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Application Information

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IPC IPC(8): C01B3/06
CPCC01B3/06Y02E60/36
Inventor 董宝霞卜凡艳
Owner YANGZHOU UNIV
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