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Method of using alkaline earth metal hydrides to prepare hydrogen-methane mixed fuel

An alkaline earth metal, mixed fuel technology, applied in the production of hydrocarbons from carbon oxides, hydrogen production, organic chemistry, etc., can solve the problems of incomprehensible reaction mechanism, expensive equipment, complicated operation, etc., to reduce combustion duration, reduce The effect of quenching interval and simple preparation device

Inactive Publication Date: 2017-09-22
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, although researchers have discovered a series of materials with good methane storage capacity, such as natural gas hydrate, metal organic framework, zeolite molecular sieve, carbon nanotube, etc., none of them can meet the level requirements of wide application
[0004] At present, the technology of carbon dioxide methanation under mild conditions is complicated to operate, the reaction mechanism is difficult to understand, and the required equipment is expensive

Method used

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  • Method of using alkaline earth metal hydrides to prepare hydrogen-methane mixed fuel
  • Method of using alkaline earth metal hydrides to prepare hydrogen-methane mixed fuel
  • Method of using alkaline earth metal hydrides to prepare hydrogen-methane mixed fuel

Examples

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Effect test

Embodiment 1

[0026] 1. In an argon glove box, the CaH 2 The sample is placed in a ball mill jar (with an internal volume of about 70 cm 3 ), put 30 small steel balls (diameter 6mm), take out the CaH 2 The ball mill tank of the sample is filled with 0.25MPa high-purity CO after the argon gas is pumped out. 2 gas, such that CaH 2 / CO 2 The molar ratio is 2:1, and the planetary ball mill (QM-3SP4) is used to carry out the ball milling reaction at 350 rpm, 450 rpm, and 550 rpm for 24 hours to obtain a mixed gas of methane and hydrogen.

[0027] 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 methane in the mixture. The mole fraction in the gas and the yield of methane after the reaction.

Embodiment 2

[0029] 1. Dissolve MgH in an argon glove box 2 The sample is placed in the ball milling jar, the ball milling jar is taken out, the argon in it is pumped out and filled with 0.25MPa high-purity CO 2 gas, such that MgH 2 / CO 2 The molar ratio is 2:1, and the planetary ball mill (QM-3SP4) is used to carry out the ball milling reaction at 350 rpm, 450 rpm, and 550 rpm for 24 hours to obtain a mixed gas of methane and hydrogen.

[0030] 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 methane in the mixture. Graph of the mole fraction in the gas and the yield of methane after the reaction.

Embodiment 3

[0032] 1. Dissolve MgH in an argon glove box 2 The sample is placed in the ball mill jar, and the ball mill jar is taken out, and the argon gas in it is pumped out and then filled with 0.1MPa, 0.25MPa, and 0.5MPa high-purity CO 2 gas, and makes MgH 2 / CO 2The molar ratio is 2:1, and the planetary ball mill (QM-3SP4) is used to carry out the ball milling reaction at a speed of 450 rpm for 24 hours to obtain a mixed gas of methane and hydrogen.

[0033] 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 methane in the mixture. Graph of the mole fraction in the gas and the yield of methane after the reaction.

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Abstract

The invention discloses a method of using alkaline earth metal hydrides to reduce carbon dioxide to prepare a hydrogen-methane mixed fuel. According to the method, in an argon atmosphere, alkaline earth metal hydrides are placed in a ball mill tank, argon is extracted from the ball mill tank, highly pure CO2 gas is filled into the ball mill tank, and a ball milling machine is adopted to carry out ball milling reactions at a room temperature to obtain the hydrogen-methane mixed fuel. The method can prepare hydrogen-methane mixed gas at a room temperature, a novel method is provided for high density storage and preparation of methane, and a novel technology, which can carry out carbon dioxide methanation under mild conditions, is also provided.

Description

technical field [0001] The invention belongs to the technical field of hydrogen-methane mixed energy, and specifically relates to a method for preparing hydrogen-methane mixed fuel by using alkaline earth metal hydride to reduce carbon dioxide under normal temperature mechanical ball milling conditions. Background technique [0002] CO 2 It is a small molecular compound with double bonds, and its comprehensive utilization has great environmental significance such as mitigating the greenhouse effect. The methanation reaction was proposed by the French chemist Paul Sabatier (carbon dioxide reduction technology). Therefore, the methanation reaction of carbon dioxide and hydrogen is also called Sabatier reaction, the process is to mix CO in a certain proportion 2 and H 2 Through a reactor equipped with a catalyst, at a certain temperature and pressure, the CO 2 and H 2 A reaction occurs to form water and methane. Although this process is under the action of a catalyst, a re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/02C07C1/02C07C9/04
CPCC01B3/02C07C1/02C07C9/04
Inventor 滕云雷王璐董宝霞
Owner YANGZHOU UNIV
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