2017
DOI: 10.1149/2.1381702jes
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Lunar Soil Simulant Electrolysis Using Inert Anode for Al-Si Alloy and Oxygen Production

Abstract: NEU-1, a new lunar soil simulant mined from the Longgang Volcano Group in Jilin Province of China, was electrochemically split into Al-Si alloy and oxygen in molten 52.7wt%NaF-47.3wt%AlF3 at 1233 K using 56wt%Fe-44wt%Ni metallic inert anode. The anode gas was analyzed by gas chromatography, while the cathode product obtained by galvanostatic electrolysis for 8 h was analyzed by means of X-ray diffraction, X-ray fluorescence, scanning electron microscopy and energy dispersive spectrometer. The results showed th… Show more

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Cited by 28 publications
(12 citation statements)
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“…The carbothermal reduction of molten regolith at ~1600 °C (also requiring subsequent methanereforming and electrolysis steps; Rosenberg et al, 1992;Gustafson et al, 2006;Balasubramaniam, 2010;Sanders and Larson, 2012), and the direct electrolysis of molten regolith at >1600 °C Haskin, 1992, 1993;Vai et al 2010;Sirk 2010;Wang et al 2011;Schreiner 2016), are less feedstock-dependent and higher yielding (theoretically 10-20% and 20-30% respectively), but require the handling of molten regolith at extreme temperatures. Research has also been conducted into the use of molten fluoride salts as a flux to dissolve lunar regolith oxide simulants and related silicate rocks at 960 -1250 °C, and hence to extract a mixed alloy electrochemically; however, these processes rely on the solubility of the various oxides and the efficacy in terms of oxygen yield has not been quantified (Kesterke 1970;Liu et al 2017).…”
Section: Introductionmentioning
confidence: 99%
“…The carbothermal reduction of molten regolith at ~1600 °C (also requiring subsequent methanereforming and electrolysis steps; Rosenberg et al, 1992;Gustafson et al, 2006;Balasubramaniam, 2010;Sanders and Larson, 2012), and the direct electrolysis of molten regolith at >1600 °C Haskin, 1992, 1993;Vai et al 2010;Sirk 2010;Wang et al 2011;Schreiner 2016), are less feedstock-dependent and higher yielding (theoretically 10-20% and 20-30% respectively), but require the handling of molten regolith at extreme temperatures. Research has also been conducted into the use of molten fluoride salts as a flux to dissolve lunar regolith oxide simulants and related silicate rocks at 960 -1250 °C, and hence to extract a mixed alloy electrochemically; however, these processes rely on the solubility of the various oxides and the efficacy in terms of oxygen yield has not been quantified (Kesterke 1970;Liu et al 2017).…”
Section: Introductionmentioning
confidence: 99%
“…Molten salt electrolysis of lunar oxides to produce oxygen and useful metals/alloys is also being considered. [280][281][282][283] Moon could then be a forward base for refuelling and replenishing essential supplies. The extra-terrestrial production of oxygen from CO 2 in the Martian atmosphere, [284][285][286] the gas making up 95 % of the atmospheric pressure of about 600 Pa, and metals from Martian regolith [287][288][289] are crucial if missions to Mars and beyond are to be sustained.…”
Section: Electrochemistry In Spacementioning
confidence: 99%
“…Electrolysis of ice in the permanently shadowed regions of Moon and liquefaction to liquid oxygen and hydrogen is an option. Molten salt electrolysis of lunar oxides to produce oxygen and useful metals/alloys is also being considered [280–283] . Moon could then be a forward base for refuelling and replenishing essential supplies.…”
Section: Introductionmentioning
confidence: 99%
“…Apparently, low‐carbon metallurgy by UTE could contribute to the goal of carbon neutrality. At the same time, lunar exploration has been a topic of intense interest worldwide during the past 50 years, and scientific research stations on the Moon are expected to be built before 2040 [50–53] . A reliable O 2 supply is a fundamental prerequisite the long‐term duty of personnel.…”
Section: Introductionmentioning
confidence: 99%