用于 ISRU 应用的熔融氟化盐中的月球模拟物行为

IF 1.8 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Planetary and Space Science Pub Date : 2024-03-01 DOI:10.1016/j.pss.2024.105854
M. Maes , M. Gibilaro , P. Chamelot , C. Chiron , S. Chevrel , P. Pinet , L. Massot , J.J. Favier
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引用次数: 0

摘要

作为原地资源利用(ISRU)研究的一部分,本研究调查了在 800 °C 下溶解于熔融 LiF-NaF 中的月兔结晶类似物在原地生产金属方面的表现。熔融氟化物具有溶解金属氧化物的能力,霍尔-赫鲁特(Hall-Héroult)工艺就是利用这种介质从 Al2O3 中生产铝的。第一步是利用电感耦合等离子体-原子发射光谱(ICP-AES)比较构成月球泥土的主要氧化物(SiO2、Al2O3、Fe2O3 和 MgO)的溶解度与晶体类似物的溶解度。联合添加的物种浓度低于单独添加的相同物种浓度。不过,这项研究表明,LiF-NaF 可用来溶解类似物,在 800 °C 时的最大溶解度为 3.9 wt%。研究还利用循环伏安图验证了 LiF-NaF 中所有氧化物的电活性,其中除 SiO2 和 TiO2 外,所有主要氧化物都具有电活性。然后在不同的条件下对不同的阴极基底进行电解,并用扫描电子显微镜(SEM)和能量色散光谱(EDS)对得到的阴极产物进行分析。尽管二氧化硅和二氧化钛不具有电活性,但它们还是通过欠电位沉积(UPD)以合金形式被提取出来。在碳电极上实现了铝和钛等其他金属的金属沉积。最后,还研究了一种由不同氧化物种类组成的合成混合物,其化学成分与模拟物相同,可替代月壤。它的电化学行为与结晶月球模拟物相同,这表明我们基于氧化物溶解的原始工艺不受原材料非晶/结晶状态的影响。
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Lunar simulant behaviour in molten fluoride salt for ISRU applications

This study investigated the behaviour of a lunar mare crystalline analog dissolved in molten LiF–NaF at 800 °C for the in situ production of metals as a part of In Situ Resource Utilization (ISRU) research. Molten fluorides have the capability to dissolve metallic oxides, and the Hall-Héroult process uses this kind of media to produce Al from Al2O3.The first step was to compare the individual solubility of the main oxides composing the mare lunar soil (SiO2, Al2O3, Fe2O3, and MgO) with the solubility of the crystalline analog using Inductively Coupled Plasma – Atomic Emission Spectroscopy (ICP-AES). The species concentration added jointly are lower than the concentration of the same species added separately. Nonetheless, this study showed that LiF–NaF can be used to dissolve the analog with a maximum solubility of 3.9 wt% at 800 °C. Cyclic voltammograms were also used to verify the electroactivity of all oxide species in LiF–NaF, wherein all the main oxides are electroactive except SiO2 and TiO2. Then electrolyses on different cathodic substrates were performed at different conditions and the obtained cathodic products were analysed with a scanning electron microscope (SEM) coupled with an energy dispersive spectroscopy (EDS). Despite the non-electroactivity of SiO2 and TiO2, they were extracted in an alloyed form through Under Potential Deposition (UPD). Metallic deposition of other metals such as aluminium and titanium was achieved on carbon electrode. Finally, a synthetic mixture made of the different oxide species with the same chemical composition as the simulant, was investigated as a viable substitute for lunar mare soil. Its electrochemical behaviour was identical to the crystalline lunar simulant showing that our original process based on oxides dissolution is not influenced by the amorphous/crystalline state of the raw material.

the outputs of LiF–NaF molten process are not critically influenced by the physical state of the lunar regolith.

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来源期刊
Planetary and Space Science
Planetary and Space Science 地学天文-天文与天体物理
CiteScore
5.40
自引率
4.20%
发文量
126
审稿时长
15 weeks
期刊介绍: Planetary and Space Science publishes original articles as well as short communications (letters). Ground-based and space-borne instrumentation and laboratory simulation of solar system processes are included. The following fields of planetary and solar system research are covered: • Celestial mechanics, including dynamical evolution of the solar system, gravitational captures and resonances, relativistic effects, tracking and dynamics • Cosmochemistry and origin, including all aspects of the formation and initial physical and chemical evolution of the solar system • Terrestrial planets and satellites, including the physics of the interiors, geology and morphology of the surfaces, tectonics, mineralogy and dating • Outer planets and satellites, including formation and evolution, remote sensing at all wavelengths and in situ measurements • Planetary atmospheres, including formation and evolution, circulation and meteorology, boundary layers, remote sensing and laboratory simulation • Planetary magnetospheres and ionospheres, including origin of magnetic fields, magnetospheric plasma and radiation belts, and their interaction with the sun, the solar wind and satellites • Small bodies, dust and rings, including asteroids, comets and zodiacal light and their interaction with the solar radiation and the solar wind • Exobiology, including origin of life, detection of planetary ecosystems and pre-biological phenomena in the solar system and laboratory simulations • Extrasolar systems, including the detection and/or the detectability of exoplanets and planetary systems, their formation and evolution, the physical and chemical properties of the exoplanets • History of planetary and space research
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