Inert anode in a high-temperature molten salt system and oxygen generation by moon regolith electrolysis

被引:0
作者
Kou M.-Y. [1 ,2 ,3 ]
Wang M.-Y. [1 ,2 ,3 ]
Jiao S.-Q. [1 ,2 ,3 ]
机构
[1] State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing
[2] School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing
[3] Beijing Key Laboratory of Green Recovery and Extraction of Rare and Precious Metals, University of Science and Technology Beijing, Beijing
来源
Gongcheng Kexue Xuebao/Chinese Journal of Engineering | 2021年 / 43卷 / 12期
关键词
Carbon emission reduction; High-temperature molten salt; Inert anode; Molten salt electrolysis; Oxygen generation from moon regolith;
D O I
10.13374/j.issn2095-9389.2021.10.08.001
中图分类号
学科分类号
摘要
In 2020, China proposed to reach the peak of CO2 emissions before 2030 and achieve carbon neutrality by 2060, which is the so-called "carbon peak and carbon neutrality" strategy. Due to strategic requirements, the metallurgical industry has the responsibility of reducing its CO2 emission as it is one of the major CO2 emitters. Therefore, it is imperative to develop low-carbon metallurgical technology. High-temperature molten salt electrochemical metallurgy uses electrons as the energy carrier and reaction driving force, having the advantages of cleanliness and high efficiency. It is the main extraction technology for aluminum, rare earth elements, alkali metal, and alkaline earth metals. Currently, carbon anodes are commonly used in molten salt electrochemical metallurgy, and CO2 product is an important carbon emission source. If an inert oxygen evolution anode is used in a high-temperature molten salt system, then low-carbon emissions can be achieved in the molten salt electrolysis process. Therefore, the development of inert anodes suitable for molten salt electrolysis systems is very important, which has recently become a worldwide research hotspot. This article first reviewed the research progress of inert anodes in various high-temperature molten salt systems, including aluminum electrolytic fluoride salts, CaCl2 molten salts, carbonates, and molten oxides. Meanwhile, the recent development and the utilization of the moon have received widespread attention. In the future construction of lunar bases, oxygen will be the basic prerequisite for human survival. Solar-driven in-situ oxygen production with molten salt electrochemistry from the moon regolith will be an important method in the future to support the oxygen demand for human survival on the moon. Hence, inert oxygen evolution anodes are essential. Therefore, this article also briefly summarized oxygen production technology by moon regolith electrolysis based on inert anodes. © 2021, Science Press. All right reserved.
引用
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页码:1618 / 1629
页数:11
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