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Lunar soil can be used to generate oxygen and fuel for astronauts on the moon

An artist’s rendering of the shape of the lunar base. Scientists studying whether lunar resources could be used to facilitate human exploration on the moon and beyond have reported that lunar soil contains active compounds that can convert carbon dioxide into oxygen and fuel. Photo credit: ESA – P. Carril

Soil on the Moon contains active ingredients that can convert carbon dioxide into oxygen and fuel, according to a new study by scientists in China, published in the Journal on May 5, 2022. Joule. They are currently investigating whether lunar resources can be harnessed to facilitate human exploration on the moon or beyond.

Nanjing University materials scientists Yingfang Yao and Zhigang Zou hope to develop a system that uses lunar soil and solar radiation, the two most abundant resources on the moon. After analyzing the lunar soil brought back by China’s Chang’e 5 spacecraft, the research team found that the sample contained compounds — including iron- and titanium-rich materials — that act as catalysts for making desirable products like oxygen using sunlight and carbon dioxide could act .

lunar soil sample

This image shows a sample of lunar soil returned by China’s Chang’e 5 spacecraft. Photo credit: Yingfang Yao

Based on the observation, the team proposed an “alien photosynthesis” strategy. Essentially, the system uses lunar soil to break down water, extracted from the moon and in astronauts’ exhaled gases, into oxygen and hydrogen, which is fueled by sunlight. Carbon dioxide emitted by the lunar inhabitants is also collected and combined with hydrogen from the electrolysis of water during the lunar soil-stimulated hydration process.

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The process produces hydrocarbons such as methane that can be used as fuel. The researchers say the strategy uses sunlight rather than external energy to produce a variety of desirable products, including water, oxygen and fuel, that could support life on the lunar base. The team is looking for a way to test the system in space, likely on China’s future manned lunar missions.

How lunar soil can be an inspiring chartHow lunar soil can be an inspiring chart

This diagram shows how the lunar soil could act as a catalyst for extraterrestrial photosynthesis to produce the oxygen and fuel needed for long-term survival on the moon. Photo credit: Yingfang Yao

“We use on-site environmental resources to reduce rocket payload, and our strategy provides a scenario for a sustainable and affordable off-planet living environment,” says Yao.

While the catalytic efficiency of lunar soil is lower than that of catalysts available on Earth, Yao says the team is testing various ways to improve the design, such as melting lunar soil into a high-entropy nanomaterial that’s a better catalyst.

This video shows photovoltaic cell powered water electrolysis stimulated by lunar soil. Photo credit: Yingfang Yao

Previously, scientists proposed many strategies for alien survival. However, most designs require power sources from the ground. for example,[{“attribute=””>NASA’sPerseverance[{“attribute=““>NASA’sPerseveranceMars rover brought an instrument that can use carbon dioxide in the planet’s atmosphere to make oxygen, but it’s powered by a nuclear battery onboard.

Research Team With Lunar Soil SampleResearch Team With Lunar Soil Sample

This photograph shows the research team at Nanjing University holding the lunar soil sample. Credit: Yingfang Yao

“In the near future, we will see the crewed spaceflight industry developing rapidly,” says Yao. “Just like the ‘Age of Sail’ in the 1600s when hundreds of ships head to the sea, we will enter an ‘Age of Space.’ But if we want to carry out large-scale exploration of the extraterrestrial world, we will need to think of ways to reduce payload, meaning relying on as little supplies from Earth as possible and using extraterrestrial resources instead.”

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Reference: “Extraterrestrial photosynthesis by Chang’E-5 lunar soil” by Yingfang Yao, Lu Wang, Xi Zhu, Wenguang Tu, Yong Zhou, Rulin Liu, Junchuan Sun, Bo Tao, Cheng Wang, Xiwen Yu, Linfeng Gao, Yuan Cao , Bing Wang, Zhaosheng Li, Wei Yao, Yujie Xiong, Mengfei Yang, Weihua Wang and Zhigang Zou, 5 May 2022, Joule.
DOI: 10.1016/j.joule.2022.04.011

This work was supported by the National Key Research and Development Program of China, the Major Research Plan of the National Natural Science Foundation of China, the National Natural Science Foundation of China, the Fundamental Research Funds for the Central Universities, the Program for Guangdong Introducing Innovative and Entrepreneurial Teams, the Natural Science Foundation of Jiangsu Province. the open fund of Wuhan National Laboratory for Optoelectronics, the Hefei National Laboratory for Physical Sciences at the Microscale, the Civil Aerospace Technology Research Project: Extraterrestrial In-situ water Extraction and Photochemical Synthesis of Hydrogen and Oxygen, and Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory.

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