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Method for preparing oxygen by using lunar soil through hydrogen reduction-electrolysis method

An electrolysis and oxygen technology, applied in the field of metallurgy, can solve the problem of inability to extract oxygen, achieve the effects of low cost, strong oxidation resistance and corrosion resistance, and improve current efficiency

Pending Publication Date: 2022-05-10
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the hydrogen reduction method can only reduce the ilmenite contained in the lunar soil to obtain iron, titanium dioxide and water, but cannot extract the oxygen element in the anorthite, the main phase of the lunar soil.

Method used

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  • Method for preparing oxygen by using lunar soil through hydrogen reduction-electrolysis method

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Experimental program
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Effect test

Embodiment 1

[0030] The process of hydrogen reduction-electrolysis method for producing oxygen from lunar soil is as follows: figure 1 As shown, the specific steps are as follows: the chemical composition of lunar soil used in this embodiment is 43.56% SiO by mass fraction 2 , 24.52% Al 2 o 3 , 8.36% FeO, 12.74% CaO, 4.13% MgO, 6.46% TiO 2 , 0.22%K 2 O, the balance is impurities.

[0031] S1. Put 50g of lunar soil into a closed reactor and raise the temperature to 900°C under vacuum;

[0032] S2. Introduce hydrogen into the reactor at a rate of 150mL / min, and keep it warm for 6 hours to produce metallic iron and anorthite-rich lunar soil, and condense to obtain another product water; and condense to obtain The water is electrolyzed to produce hydrogen and oxygen;

[0033] S3. Put the anorthite-rich lunar soil separated from the metal iron into an electrolytic cell with graphite as the cathode and iridium-tungsten alloy as the anode, and raise the temperature to 1550°C to melt the lun...

Embodiment 3

[0040] S1. Put 50g of lunar soil into a closed reactor and raise the temperature to 1250°C under vacuum conditions; among them, the chemical composition of lunar soil is 46.95% SiO by mass fraction 2 , 22.47% Al 2 o 3 , 5.14% FeO, 11.38% CaO, 5.34% MgO, 8.27% TiO 2 , 0.43%K 2 O, the balance is impurities.

[0041] S2. Introduce hydrogen gas at a rate of 250mL / min into the reactor and keep it warm for 2 hours to produce metallic iron and anorthite-rich lunar soil, and condense to obtain another product water, which is electrolyzed to prepare hydrogen and oxygen ;

[0042]S3. Put the anorthite-rich lunar soil separated from the metallic iron into the electrolytic cell, and raise the temperature to 1650°C to melt the lunar soil into liquid slag;

[0043] S4. Using graphite as the cathode and iridium-tungsten alloy as the anode, control the current density of the electrolytic cell to be constant at 1.0A / cm 2 , the contact surface area between the anode of the electrolytic ce...

Embodiment 4

[0046] S1. Put 50g of lunar soil into a closed reactor and raise the temperature to 950°C under vacuum; among them, the chemical composition of lunar soil is 49.25% SiO by mass fraction 2 , 18.61% Al 2 o 3 , 12.83% FeO, 10.2% CaO, 7.87% MgO, 0.86% TiO 2 , 0.37%K 2 O, the balance is impurities.

[0047] S2. Introduce hydrogen at a rate of 200mL / min into the reactor and keep it warm for 3 hours to prepare metallic iron and anorthite-rich lunar soil, and condense to obtain another product water, and electrolyze the condensed water to prepare hydrogen and oxygen;

[0048] S3. Put the anorthite-rich lunar soil separated from the metallic iron into the electrolytic cell, and raise the temperature to 1600°C to melt the lunar soil into liquid slag;

[0049] S4. Using graphite as the cathode and iridium-tungsten alloy as the anode, control the current density of the electrolytic cell to be constant at 0.8A / cm 2 , the contact surface area between the anode of the electrolytic cell...

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Abstract

The invention belongs to the technical field of metallurgy, and relates to a method for preparing oxygen from lunar soil through a hydrogen reduction-electrolysis method. The method comprises the steps that the lunar soil is heated to the reduction temperature under the vacuum condition; introducing hydrogen into the mixture, keeping the temperature for a period of time to prepare metal iron and anorthite-rich lunar soil, and condensing to obtain water; the method comprises the following steps: putting anorthite-rich lunar soil separated from metal iron into a closed electrolytic bath, and heating to an electrolysis temperature to melt the lunar soil into liquid slag; and the anorthite-rich lunar soil slag is electrolyzed, an aluminum-silicon alloy is obtained at a cathode, and oxygen is obtained at an anode. According to the method, iron in the lunar soil is extracted in advance through hydrogen reduction, mutual conversion of Fe (II) and Fe (III) ions between the cathode and the anode in the electrolysis process is avoided, and the current efficiency is high; oxygen in the main phase anorthite of the lunar soil is extracted through an electrolytic method, and the yield of the oxygen is high.

Description

technical field [0001] The invention relates to a hydrogen reduction-electrolysis method for preparing oxygen from lunar soil, which belongs to the technical field of metallurgy. Background technique [0002] The development of lunar resources and the construction of lunar bases are a cutting-edge subject that intersects multiple disciplines and is of great scientific significance. The distance between the earth and the moon is about 380,000 kilometers, and the transportation cost is expensive. Therefore, the metal materials and oxygen required for long-term and permanent lunar activities cannot rely on the supply and delivery of the earth, and can only be used in situ according to the environmental conditions of the lunar surface. The composite oxide contained in the lunar soil realizes the self-sufficiency of metal materials and oxygen in the lunar base. [0003] The mineral analysis of lunar soil samples shows that the lunar soil located in the highlands is mainly anorth...

Claims

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Application Information

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IPC IPC(8): C25B1/02C25B1/04C25B1/33C25B15/02C25C3/06
CPCC25B1/02C25B15/02C25B1/04C25C3/06C25B1/33
Inventor 刘爱民张杰石忠宁张元坤刘风国胡宪伟于江玉王兆文
Owner NORTHEASTERN UNIV
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